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Tytuł:
Characterization of the mechanomyographic signal of three different muscles and at different levels of isometric contractions
Autorzy:
Jotta, B.
Garcia, M. A. C.
Pino, A. V.
Souza, M. N. de
Powiązania:
https://bibliotekanauki.pl/articles/306272.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mechanomiografia
sygnał MMG
mięśnie
siła mięśni
mechanomyography
MMG signal
muscle twitch
muscle activation pattern
muscle force
Opis:
Purpose: Lateral (X) and longitudinal (Y) mechanical oscillations of muscle fibers that take place during muscular contraction seem to contain information additionally to the myoelectric activity, which can contribute to the interpretation of some muscle gradation force mechanisms. However, no previous study was found that had investigated the relationship between the muscle force and features associated to the mechanomyographic (MMG) signal obtained by means of a biaxial accelerometer in three different muscles. Therefore, the aim of this study was to evaluate the relationship between the force output at different load levels (20% to 100%) of the maximum voluntary isometric contraction (%MVIC) and the two signals supplied by a biaxial accelerometer and, in addition, the so-called resultant (R) acceleration signal derived from the two signals mentioned previously. Twenty seven male volunteers participated in this study. Methods: The force output related to the right biceps brachii, soleus and gastrocnemius medialis muscles was studied by means of linear regression models fit to log-transformed of the root mean square (RMS) values of the MMG signals in X, Y, and R axes versus each %MVIC. The phase angle of R acceleration (PhaseR) and anthropometric data were also considered. Results: The angular coefficient a and the antilog of y-intercept b from the log-transformed of MMG data values versus force output were able to distinguish partially motor unit strategies during isometric contractions in the three muscles studied. Conclusion: The findings suggest that biaxial accelerometer seems to be an interesting approach in the assessment of muscle contraction properties.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 4; 73-84
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Muscle torque of healthy individuals and individuals with spastic hemiparesis after passive static streching
Autorzy:
Freitas, S. T. T.
Abreu, E. M. C.
Reis, M. C.
Cunha, B. S.
Prianti, T. S. M.
Lima, F. P.
Lima, M. O.
Powiązania:
https://bibliotekanauki.pl/articles/306898.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mięśnie
siła mięśni
rozciąganie
muscle hypertonia
muscle strength
passive stretching
Opis:
Spasticity is one of the main causes of contracture, muscle weakness and subsequent functional incapacity. The passive static stretching can be included as having the purpose of increasing musculoskeletal flexibility, however, it also can influence the muscle torque. The objective is to verify the immediate effect of passive static stretching in the muscle strength of healthy and those who present spastic hemiparesis. There were assessed 20 subjects, 10 spastic hemiparetic (EG) and 10 healthy individuals (CG), including both sexes, aged between 22 and 78 years. The torque of extensor muscles of the knee was analyzed using isokinetic dynamometer. Results have shown that EG has less muscle torque compared to CG ( p < 0.01). In addition, EG presented a decrease in significance of muscle torque after stretching ( p < 0.05), however, it has not shown significant alteration in muscle torque of CG after performing the program that was prescribed. Immediately after the passive stretch, a significant torque decrease can be seen in hypertonic muscle; it is believed that this reduction may be associated with the physiological overlap between actin and myosin filaments and so preventing the muscle to develop a maximum contraction.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 1; 35-39
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do different muscle strength levels affect stability during unplanned gait termination?
Autorzy:
Cen, Xuanzhen
Jiang, Xinyan
Gu, Yaodong
Powiązania:
https://bibliotekanauki.pl/articles/306615.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
siła mięśni
chód
ciśnienie podeszwowe
równowaga
muscle power
muscle strength
gait stop
plantar pressure
foot balance
Opis:
Unplanned gait termination (UGT) widely occurs in various sports and daily life as a kind of stress response to unexpected stimulus. However, the body stability may be greatly affected when the body completely stops. The purpose of this study was to examine the association between muscle strength levels and body stability during UGT through comparing the plantar pressure. Methods: Twenty healthy participants (10 male and 10 female) with different lower limbs muscle strength and power were asked to perform planned gait termination (PGT) and unplanned gait termination (UGT) on an 8-m walkway. Related plantar pressure data including maximum pressure, maximum force, contact area and center of pressure were recorded with Footscan pressure platform. Results: Two types of gait termination have significant differences in the plantar pressure distribution. Maximum pressure and maximum force in the lateral metatarsal increased significantly during UGT, compared to PGT. At the same time, data from the current study suggested that there might be a correlation between the muscle strength levels of individual and the stability during the gait termination, especially between the muscle power and UGT, which means that the more excellent muscle power an individual has, the more stable the body is when UGT is performed. Conclusions: The findings suggest that different muscle strength levels could affect stability during unplanned gait termination.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 4; 27-35
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical characteristics of the jump down of healthy subjects and patients with knee injuries
Autorzy:
Mielińska, A.
Czamara, A.
Szuba, Ł.
Będziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/307066.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mięśnie
siła mięśni
aktywność mięśni
prędkość
biomechanika
vertical ground reaction forces
muscle power
muscle activity
velocity
acceleration
mass centre reposition
Opis:
Purpose: The aim of this study is to investigate the drop jump performance of male patients who underwent ACLR and a control group using combined data acquisition system. Methods: A total of 28 male subjects aged 20 to 26 were studied: 22 did not show and were not diagnosed with any knee joint dysfunction (the control group) and six men who underwent ACLR of the left limb (group of patients). The control group was age, height and body mass matched. A data acquisition setup consisting of three independent modules including force platforms, position analysis system and electromyography was used. Subjects were jumping down from 0.1, 0.2, and 0.3 m step heights. The acquired signals were used to determine the ground reaction force, muscular activity, mass centre position, velocity and acceleration. Results: Statistically significant differences were found between the groups (t-test, p < 0.05) in the maximum vertical ground reaction force in the left limb for 0.2 and 0.3 m step heights. Differences in the muscle activity between the groups were found to be statistically significant (t-test, p < 0.05) before the jump, during the landing phase, and after the jump for selected muscle groups and step heights. Conclusion: Combing the three independent measurement systems provided new information on drop jump biomechanics. The distribution of loads in different muscles was not uniform across the groups. Patients allocated more energy to control their motion and seemed to protect their operated limb by shifting the bodyweight to the healthy limb.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 2; 111-120
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of relationship between the results of selected tests for muscle strength assessment of the hip abductors
Autorzy:
Szczygieł, E.
Kotla, K.
Masłoń, A.
Golec, J.
Czechowska, D.
Staszkiewicz, R.
Krzywda, E.
Golec, E.
Powiązania:
https://bibliotekanauki.pl/articles/306845.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biodro
siła mięśni
test
hip
muscle strength
functional testing
Opis:
Purpose: The assessment of hip joint abductor muscle strength is most often carried out using a dynamometric test. However, both in clinical practice and literature, evaluation is performed by means of the single-leg half-squat or the amount of abduction movements performed in the hip joint. In this context, the question arises whether the results of individual tests are convergent. The aim of the study is to evaluate the relationship between strength of the hip abductor muscle measured by dynamometer, the single-leg-squat and the number of repetitions of the movements in time. Methods: A group of 35 students (20 women and 15 men) between 20 and 24 years old participated in the study. Each student was subjected to three tests assessing the condition of the hip and associated abductor muscles. Those included: assessment of hip joint abduction muscle strength in a dynamometric study, assessment of the number of abdomen movements performed lying on the side and standing, during a 30-second interval, and the single-leg-squat test. Results: Based on the tests conducted, a significant relationship was observed between the muscle strength measurement results for the left and right side in the dynamometric study and the number of hip abduction repetitions in 30 seconds and the single-leg-squat test. Conclusions: The obtained results indicate a significant relationship between the results of all the tests. In practice, this means that the tests can be used interchangeably.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 2; 125-131
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Handgrip explosive force is correlated with mobility in the elderly women
Autorzy:
Borges, L. S.
Fernandes, M. H.
Schettino, L.
Coqueiro, R. S. da
Pereira, R.
Powiązania:
https://bibliotekanauki.pl/articles/306407.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
starzenie
mobilność
siła mięśni
aging
mobility
maximum muscle strength
Opis:
The analysis of explosive force, through rate of force development (RFD) and contractile impulse (CI), from handgrip strength data seems to be useful and promising information to study the aging of musculoskeletal system and health status. We aimed to test the hypothesis that, in elderly women, the handgrip explosive force could be better associated to the functional mobility than maximum handgrip strength. Handgrip strength and the performance of Timed Up & Go Test (TUG) were measured from sixty-five community-dwelling healthy elderly women. The average slope of the moment–time curve (Δ moment/Δ time) over the time interval of 0–200 ms relative to the onset of contraction was calculated to provide the RFD and CI. The highest strength achieved during the isometric contraction was used as maximum handgrip strength. Pearson correlations were used to assess the strength of the relationship between the handgrip strength parameters (Maximum strength and explosive force from 0–200 ms) and TUG test performance from older women. The correlation analysis showed that the TUG test performance was inversely correlated to the handgrip strength parameters, with better relationship with explosive force parameters. The handgrip explosive force seems to be a promising predictor of functional mobility of elderly women, since it showed a better relationship with functional mobility than maximum handgrip strength.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 3; 145-149
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyznaczanie sił mięśniowych podczas chodu dzieci zdrowych
Estimation of muscle forces during gait of healthy children
Autorzy:
Głowacka, A.
Świtoński, E.
Michnik, R.
Powiązania:
https://bibliotekanauki.pl/articles/99317.pdf
Data publikacji:
2012
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
siła mięśni
elektromiografia
biomechanika chodu
sEMG
muscle forces
electromyography
gait biomechanics
Źródło:
Aktualne Problemy Biomechaniki; 2012, 6; 31-36
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of upper limb muscle strength in the early phase of brain stroke
Autorzy:
Starosta, M.
Kostka, J.
Redlicka, J.
Miller, E.
Powiązania:
https://bibliotekanauki.pl/articles/306344.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
siła mięśni
kończyna górna
udar
dynamometr
muscle strength
upper limb
stroke
dynamometer
Opis:
Purpose: The aim of this study was to determine the muscles with the lowest strength in nonaffected (non-A) and affected upper limb (A), to assess differences between men and women and to correlate these values with age in patients after stroke. Methods: Sixty hospitalized in Neurorehabilitation Ward patients (40 male, 20 female), 1-2 weeks after stroke, were enrolled to the study. Their age ranged from 50 to 80 years with a mean (sd) of 65,5 (18,7) years. Muscle force values from upper limb muscles were measured using the MicroFet 2 hand-held dynamometer. The results are displayed in newtons [N], mean values of muscular force, effect sizes and confidence intervals displayed as Cohen’s d and 95% CI were determined. Moreover, we made the coefficients correlation for differences in muscular force versus the Rivermead Motor Assessment (RMA) arm section. Results: Strength of (A) upper limb in comparison to (non-A) was 39% weaker. The severely affected muscle groups were the shoulder flexion 41% (women) versus 46% (men); elbow flexion 39% (women) versus 31% (men); wrist extension 36% (women) versus 42% (men). No significant correlations were found between muscle strength results and RMA or age. Conclusions: Muscle force of (A) upper limb after stroke demonstrates 39% decrease. Men show more significant decrease than women (40% vs 35%). Functional assessment in RMA values show the better results in women (4,9 ± 4,1) than men (3,4 ± 3,2).
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 3; 85-91
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower extremity muscle strength, postural stability and functional movement screen in female basketball players after ACL reconstruction : Preliminary report
Autorzy:
Wrzesień, Zuzanna
Truszczynska-Baszak, Aleksandra
Rzepka, Remigiusz
Powiązania:
https://bibliotekanauki.pl/articles/307162.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
koszykówka
ACL
siła mięśni
basketball players
ACL reconstruction
functional stability
muscle strength
Opis:
The anterior cruciate ligament (ACL) tear is a common injury in basketball. Its consequence is a long absence from training, resulting from surgical treatment and long physiotherapy. The aim of the study was to assess muscle strength, postural stability and functional movements in female basketball players, who returned to professional sport careers after anterior cruciate ligament reconstruction. Methods: The study population consisted of 10 female basketball players after surgical reconstruction of anterior cruciate ligament. The control group consisted of 10 players without ACL injury. We used the Biodex System 4 Pro dynamometer to assess the muscle strength of the knee. We used it to conduct the test of flexors and extensors of the knee in isokinetic conditions. We also used Keiser Power Squat A300 in the single leg squat to measure power and the Biodex Balance SD dynamographic platform to assess balance in single leg stance. Results: We found deficits in both movement patterns and in muscle strength in the study population, compared to control group. Conclusions: The basketball players after ACL reconstruction had significant differences between the operated and non-operated limb. The differences may predispose them towards repeated ACL injuries.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 2; 71-81
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlations between somatic features, anteroposterior spinal curvatures and trunk muscle strength in schoolchildren
Autorzy:
Barczyk-Pawelec, K.
Dziubek, W.
Piechura, J. R.
Rożek, K.
Powiązania:
https://bibliotekanauki.pl/articles/307173.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
krzywizna kręgosłupa
fotogrametria
postura
siła mięśni
spinal curvatures
photogrammetry
posture
muscle strength
Opis:
Background: Evaluation of body posture and strength of spinal muscles in children during their progressive ontogenesis is significant for the evaluation of their physical health condition and physical fitness. It is also a reference point in a process of control and medical care. Purpose: The aim if this study was to evaluate correlation between the selected features of somatic body structure, shape of anteroposterior spinal curves and force-velocity (FV) parameters of trunk muscles in school children. Participants and methods: The sample involved 104 children aged 10–11 years, 60 females (10.74 ± 0.7) and 44 males (10.50 ± 0.9). Body posture was assessed using the Moiré photogrammetry while trunk muscles (flexors and extensors) strength was measured isokinetically. Results: The results of the research revealed the existence of many average and strong correlations observed between the analysed somatic characteristics and forcevelocity (FV) parameters of trunk muscles. Correlation between the volume of the spinal curvatures in the sagittal plane and forcevelocity parameters of trunk extensors and flexors were average or weak for both groups of children. Conclusion: Somatic features indicated stronger correlation with trunk muscles' strength than with the size of the anteroposterior spinal curves.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 133-139
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Body balance a few years after total hip replacement
Autorzy:
Wareńczak, Agnieszka
Lisiński, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/307510.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
staw biodrowy
chód
siła mięśni
balance
total hip replacement
gait
muscle strength
Opis:
These aim of the study was to conduct a long-term evaluation of whether total hip replacement permanently affects the dynamic body balance. Methods: Twenty-five patients after the unilateral total hip replacement (mean age: 69.9 ± 6.2) and 25 subjects without the total hip replacement (mean age: 68.4 ± 4.8) who matched the age and overall health participated in this study. The force platform and functional tests such as Timed Up and Go, 3m walk test, Functional Reach Test, 30s Chair Stand Test, Step Test and Berg Balance Scale were used to assess dynamic balance. The results obtained in individual trials were compared using the Student’s t-test for independent variables, the Welch test or the non-parametric Mann–Whitney U-test. Results: Subjects from the THR group exhibited significantly increased time and distance in the tests performed on the force platform, compared to the control group. We also observed worse balance and functional test scores in the THR group: Timed Up and Go test ( p < 0.001), 3 m walk test ( p < 0.001), Functional Reach Test ( p < 0.001), 30 s Chair Stand Test ( p = 0.001) and Step Test (operated leg: p < 0.001, non-operated leg: p < 0.001). The results obtained in the Berg Balance Scale tests were not significantly different between the groups ( p = 0.218). Conclusions: We observed significant differences in postural stability and dynamic balance between patients after THR and subjects in the same age without endoprosthesis. Our research shows that total hip replacement permanently impairs patients’ dynamic balance and their functionality in certain lower-extremity activities.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 1; 87-96
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Force analysis of shoulder joint muscles in the early phase of brain stroke
Autorzy:
Starosta, M.
Kostka, J.
Miller, E.
Powiązania:
https://bibliotekanauki.pl/articles/306827.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
siła mięśni
staw ramienny
udar
dynamometr
muscle force
upper limb
shoulder joint
stroke
dynamometer
Opis:
Upper limb impairment in the early phase of brain stroke is one of the key problems in rehabilitation. An estimation of muscle force can be a helpful factor for functional improvement after a stroke. The primary goals of this study were to determine the muscles with the lowest force in the affected (A) and non-affected (non-A) upper limb. Moreover, the differences between men and women were compared and these values were correlated with age. Methods: One hundred (n = 35 female, n = 65 male) post-stroke patients met the inclusion criteria. The mean age of the study participants was 66.1 years. Muscle force for external and internal rotators of shoulder was measured with handheld dynamometer. Moreover, the correlation coefficients for differences in muscular force with the patient’s age were estimated. Results: Our study reports that the force of the (A) side in relation to the (non-A) was by 37% weaker. We observed about a 40% decrease in the force of the shoulder’s external rotation (female – 42%; male – 41%) and shoulder’s flexion (by 38% – female; 40% – male). Significant correlations between the muscle force and the age of post-stroke patients were also found. It was concluded that about 4 weeks after the first stroke in the patient’s life, the external rotators are the most affected group of shoulder muscles. Conclusions: Neither sex nor the side of the ischemic brain injury influence the muscle force, whereas age determines both muscle force and muscle force deficits. Older post-stroke patients demonstrate fewer deficits in muscle strength than younger ones.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 107-113
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilometric indicators as an element of verifying rehabilitation of patients before and after reconstruction of anterior cruciate ligament
Autorzy:
Ogrodzka-Ciechanowicz, K.
Czechowska, D.
Chwała, W.
Ślusarski, J.
Gądek, A.
Powiązania:
https://bibliotekanauki.pl/articles/306953.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ACL
kontrola postawy ciała
siła mięśni
rehabilitacja
body posture control
stabilometric indicators
muscle strength
rehabilitation
Opis:
The aim of the study was to evaluate effectiveness of rehabilitation in patients before and after rACL, based on stabilographic indicators. Methods: The research group was comprised of 31 men aged 20–57 with anterior cruciate ligament injury, qualified for reconstruction surgery. A measurement of static stabilometric indicators and muscle strength was taken twice for each patient – before surgery and after 6 months. To assess stabilographic indicators the stabilographic platform was used and to asses muscle strength a dynamometer was used. In order to assess knee function the Lysholm scale and VAS scale were used. Results: The rehabilitation programme improved static stability of the knee in the frontal plane, which is manifested by a significant shortening of the SPML path length. Rehabilitation proceedings should focus on improving static stability of the knee joint in the sagittal plane, because the results obtained indicate only a slight shortening of the SPAP length. The results of the Lysholm and VAS scales point to a positive influence of the applied rehabilitation. Conclusion: Inclusion into rehabilitation diagnostic tools to assess stabilometric indicators enables for effective verification of rehabilitation proceedings focused on restoring body posture control before and after the rACL.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 101-107
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Is there any relationship between decrease in bone mineral density in women, and deterioration in quality of life?
Czy istnieje związek pomiędzy zmniejszeniem gęstości masy kostnej u kobiet a pogorszeniem jakości życia?
Autorzy:
Mika, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1934241.pdf
Data publikacji:
2005
Wydawca:
Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie
Tematy:
Osteoporosis
Physical activity
muscle strength
Spine
range of motion
osteoporoza
aktywność fizyczna
siła mięśni
kręgosłup
zakres ruchomości
Opis:
Background: Osteoporosis is a chronic metabolic bone disease leading to progressive destruction of bone microarchitecture and loss of function. Osteoporosis as a chronic disease can contribute to psychosocial disorders like changes in quality of life. The aim of our study was to assess if quality of life, especially such factors like pain, emotional status, physical fitness, are related to functional state of the spine of evaluated patients?Methods:189 female subjects aged 50 to 80 years were evaluated in this study. All were evaluated for: bone mineral density (BMD), the thoracic kyphosis, range of spinal thoracic motion in sagittal plane, strength of the back extensors and the physical activity level. Quality of life was assessed by SF–36 questionnaire.Results: Physically active subjects assessed their quality of life significantly better in all evaluated categories than sedentary subjects (p<0.01). When the cohort was divided according to their back extensor strength value there were significant differences in 5 from among 8 categories of quality of life (p<0.001), where stronger subjects assessed their quality of life better than sedentary. Subjects with a greater range of sagittal spinal motion assessed better their quality of life in 2 categories (p<0.001). There were no significant differences in quality of life both when the cohort were divided according to their BMD (p>0.05) and to thoracic kyphosis (p>0.05).Conclusion: The decrease in quality of life is influenced by pain, restriction in spinal range of motion, and decrease in back muscle strength. It was also observed that sedentary subjects assessed their quality of life worse in comparison to people who were physically active.
Cel: Osteoporoza jako uogólniona choroba szkieletu skutkuje wystąpieniem złamań, którym często towarzyszy ból i utrata sprawności. Efektem tych często przewlekłych dolegliwości są zaburzenia natury psycho-społecznej wpływające na jakość życia. Celem pracy jest stwierdzenie czy samoocena jakości życia, czyli czynniki takie jak ból, stan emocjonalny, sprawność fizyczna wykazują związek ze stwierdzonym u pacjentów stanem funkcjonalnym kręgosłupa oraz gęstością mineralną kości? Materiał i Metoda: Badaniami objęto 189 kobiet w wieku 50–80 lat. U każdego pacjenta wykonano następujące pomiary, na podstawie których podzielono badaną populację na podgrupy: pomiar gęstości tkanki kostnej (BMD), pomiar kąta kifozy piersiowej, pomiar zakresu ruchomości w płaszczyźnie strzałkowej odcinka piersiowego kręgosłupa, pomiar siły mięśni prostowników kręgosłupa oraz ocena poziomu aktywności fizycznej. Do oceny jakości życia pacjentów zastosowano kwestionariusz samooceny SF–36. Wyniki: Osoby aktywne fizycznie wykazywały statystycznie istotnie lepszą samoocenę jakości życia w zakresie wszystkich analizowanych kategorii w porównaniu z pacjentami prowadzącymi siedzący tryb życia (p<0,01). W przypadku, gdy siła mięśni stanowiła kryterium grupujące stwierdzono statystycznie istotne różnice w 5 z 8 analizowanych kategorii samooceny jakości życia (p<0,001) – osoby silniejsze oceniały jakość swojego życia lepiej niż słabsze. Osoby, u których zakres ruchomości kręgosłupa w płaszczyźnie strzałkowej był większy wykazywały lepszą samoocenę w 2 kategoriach (p<0,001). Nie stwierdzono statystycznie istotnych różnic zarówno, gdy analizowano zmienność w samoocenie jakości życia w zależności od stwierdzonej u pacjentów gęstości masy kostnej (p>0,05), jak i w zależności od wielkości kąta kifozy piersiowej (p>0,05). Wnioski: Na pogorszenie jakości życia wpływa ograniczenie ruchomości kręgosłupa i spadek siły mięśniowej. Zaobserwowano też gorszą samoocenę u osób prowadzących siedzący tryb życia w porównaniu z osobami aktywnymi fizycznie.
Źródło:
Medical Rehabilitation; 2005, 9(2); 15-19
1427-9622
1896-3250
Pojawia się w:
Medical Rehabilitation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromyographic Analysis of a Repetitive Hand Gripping Task
Autorzy:
Cook, T.
Rosecrance, J.
Zimmermann, C.
Gerleman, D.
Ludewig, P.
Powiązania:
https://bibliotekanauki.pl/articles/91061.pdf
Data publikacji:
1998
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
electromyography
cumulative trauma disorders
work-rest cycle
muscle force
hand gripping
elektromiografia
siła mięśni
cykl pracy
kończyna górna
Opis:
Electromyography (EMG) has been proposed as a method for determining muscle effort in repetitive upper limb tasks, which are often related to cumulative trauma disorders. EMG activity of the finger flexor musculature was investigated during a repetitive hand gripping task having 5 different cycle durations (2 to 6 s), various percentage of work time (and rest) within the work cycle (20% to 80%), and 3 different grip force levels. Thirty healthy adult participants each performed 27 randomly ordered 30-s repetitive hand gripping trials as well as 3 isometric contractions, which were used to normalize data from the hand gripping trials. There was a significant decrease in mean EMG as the duration of the work-rest cycle time increased. At each force level, EMG increased as the percentage of work time within the work-rest cycle increased, but to a greater extent at the highest force level. The results of this study suggest that overall muscle effort, and perhaps muscle fatigue, can be reduced most effectively by modifying the force requirements of the repetitive task. Other variables, such as the percentage of work time within a cycle and overall work cycle time have less effect on the EMG activity level. The results of this study have implications for developing strategies to reduce muscle fatigue during repetitive hand gripping tasks in an effort to reduce the effects of cumulative trauma disorders.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1998, 4, 2; 185-198
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
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