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Wyświetlanie 1-8 z 8
Tytuł:
Acute effects of different orthoses on lower extremity kinetics and kinematics during running; a musculoskeletal simulation analysis
Autorzy:
Sinclair, Jonathan
Ingram, Jane
Taylor, Paul John
Chockalingam, Nachiappan
Powiązania:
https://bibliotekanauki.pl/articles/307279.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bieg
orteza
biomechanika
patologia
running
orthoses
biomechanics
pathology
Opis:
The current investigation aimed to examine the effects of different orthotic conditions on the biomechanical mechanisms linked to the aetiology of chronic pathologies using musculoskeletal simulation. Methods: 16 male and 20 females ran over an embedded force plate at 4.0 m/s, in five different conditions (medial, lateral, no-orthoses, semi-custom and off the shelf). Kinematics of the lower extremities were collected using an eight-camera motion capture system and lower extremity joint loading also explored using a musculoskeletal simulation approach. Differences between orthoses conditions were examined using 2 2 mixed ANOVA. Results: External instantaneous load rate was significantly reduced in the off the shelf orthoses (male = 1290.60 and female = 1567.10 N/kg/s), compared to the medial (male = 1480.45 and female = 1767.05 N/kg/s) and semi-custom (male = 1552.99 and female = 1704.37 N/kg/s) conditions. In addition, peak patellofemoral stress was significantly lower in the off the shelf orthoses (male = 68.55 and female = 94.91 KPa/kg) compared to the lateral condition (male = 70.49 and female = 103.22 KPa/kg). Finally, peak eversion angles were significantly attenuated in the medial orthoses (male = –6.61 and female = –7.72 deg) compared to the lateral (male = –9.61 and female = –10.32 deg), no-orthoses (male = –8.22 and female = –10.10 deg), semi-custom (male = –8.25 and female = –9.49 deg) and off the shelf (male = –7.54 and female = –8.85 deg) conditions. Conclusions: The current investigation shows that different orthotic devices/ configurations may provide distinct benefits in terms of their effectiveness in attenuating the biomechanical parameters linked to the aetiology of chronic running injuries.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 4; 13-25
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal velocity in the race over variable slope trace
Autorzy:
Maroński, R.
Samoraj, P.
Powiązania:
https://bibliotekanauki.pl/articles/307299.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
czas jazdy
trasa
rower
minimum-time running
variable slope trace
velocity
Opis:
The minimum-time running problem is reconsidered. The time of covering a given distance is minimized. The function that should be found is the runner’s velocity that varies with the distance. The Hill-Keller model of motion is employed. It is based on the Newton second law and an equation of power balance. The new element of the current approach is that the trace slope angle varies with the distance. The problem is formulated and solved in optimal control applying the Chebyshev direct pseudospectral method. The essential finding is that the optimal velocity during the cruise is constant regardless of the local slope of the terrain. Such result is valid if the inequality constraints imposed on the propulsive force or the energy are not active.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 2; 149-153
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of minimalist and conventional sports shoes and lower limbs dominance on running gait
Autorzy:
Jandova, S.
Volf, P.
Vaverka, F.
Powiązania:
https://bibliotekanauki.pl/articles/307459.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
analiza kinematyczna
siły reakcji podłoża
bieganie
laterality
kinematic analysis
ground reaction forces
running
Opis:
Purpose: The aim of this study was to determine how minimalist running shoes (MRS), conventional running shoes (CRS) and the dominance of lower limbs influence the running gait. Methods: Trained recreational runners (N = 13) who have been engaged in regulary running for more than one year were participants in this study. They were experienced with using MRS and CRS for more than half year and they used both types of shoes. An in-shoe pressure measuring system (Pedar-X®, Novel, Munich, Germany) was used to monitor plantar pressure and vertical force and the temporal parameters when running in MRS and CRS during the stance phase, the swing phase and over one stride. Results: Running in CRS significantly prolonged stance, swing and stride phases by 2–11% compared to MRS. In contrast, when running in MRS significantly larger values of maximum pressure (9–14%) and maximum vertical force (3–7%) than in CRS were found. Conclusions: For this reason, running in MRS could be recommended to recreational runners only with care. The effect of limb dominance on temporal characteristics was detected when running in CRS. Significantly longer stance phase for dominant limb is associated with a shorter swing. The kinematics variables were significantly higher for dominant limb than for non-dominat limb when running in MRS and CRS (by 12–23%).
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 3-9
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between lower limbs kinematic variables and effectiveness of sprint during maximum velocity phase
Autorzy:
Struzik, A.
Konieczny, G.
Grzesik, K.
Stawarz, M.
Winiarski, S.
Rokita, A.
Powiązania:
https://bibliotekanauki.pl/articles/307199.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
prędkość kątowa
czujniki inercjalne
docieranie
sportowiec
angular velocity
inertial sensors
motion pattern
running
young athletes
Opis:
Purpose: The aim of the study was to determine the relationships between time of running over a 15–25 m section of a 30-meter run along a straight line and changes in the angle and angular velocity observed in ankle, knee and hip joints. Therefore, the authors attempted to answer the question of whether a technique of lower limbs movement during the phase of sprint maximum velocity significantly correlates with the time of running over this section. Methods: A group of 14 young people from the Lower Silesia Voivodeship Team participated in the experiment. A Fusion Smart Speed System was employed for running time measurements. The kinematic data were recorded using Noraxon MyoMotion system. Results: There were observed statistically significant relationships between sprint time over a section from 15 to 25 m and left hip rotation (positive) and between this time and left and right ankle joint dorsi-plantar flexion (negative). Conclusions: During the maximum velocity phase of a 30 m sprint, the effect of dorsi-plantar flexion performed in the whole range of motion was found to be beneficial. This can be attributed to the use of elastic energy released in the stride cycle. Further, hip rotation should be minimized, which makes the stride aligned more along a line of running (a straight line) instead of from side to side.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 4; 131-138
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for acquiring data on terrain geomorphology, course geometry and kinematics of competitors’ runs in alpine skiing : a historical review
Autorzy:
Erdmann, W. S.
Giovanis, V.
Aschenbrenner, P.
Kiriakis, V.
Suchanowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/306710.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
narciarstwo alpejskie
topografia terenu
zawody sportowe
kinematyka
alpine skiing
topographical methods
course geometry
competitors’ running
Opis:
Purpose: This paper aims at the description and comparison of methods of topographic analysis of racing courses at all disciplines of alpine skiing sports for the purposes of obtaining: terrain geomorphology (snowless and with snow), course geometry, and competitors’ runs. Methods: The review presents specific methods and instruments according to the order of their historical appearance as follows: (1) azimuth method with the use of a compass, tape and goniometer instruments; (2) optical method with geodetic theodolite, laser and photocells; (3) triangulation method with the aid of a tape and goniometer; (4) image method with the use of video cameras; (5) differential global positioning system and carrier phase global positioning system methods. Results: Described methods were used at homologation procedure, at training sessions, during competitions of local level and during International Ski Federation World Championships or World Cups. Some methods were used together. Conclusions: In order to provide detailed data on course setting and skiers’ running it is recommended to analyse course geometry and kinematics data of competitors’ running for all important competitions.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 69-79
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical properties of alternative suture technique for flexor tendon repair
Autorzy:
Andrzejewski, T.
Czarnecki, P.
Dąbrowski, M.
Spławski, R.
Rogala, P.
Romanowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/307209.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
obrażenia ciała
szew
wytrzymałość na zerwanie
flexor injuries
multistrand running suture
modified Kessler suture
suture breaking strength
Opis:
Purpose: Flexor injuries are most common in the hand and require special attention and experience from the surgeon. Both quality and technique affect the stability of the suture. The selection of the optimum method will influence the process of rehabilitation. The aim of this study was to compare three different suture techniques based on the strength, depending on the method of breakage, i.e., axial or pulley load. Methods: The study was divided into six sessions. The research material was dissected deep flexor porcine tendons. Three types of stitches were used: the modified Kessler suture with an additional running suture, the cruciate four-strand suture with an additional running suture and the multistrand running suture. We obtained 120 sutures, 40 for each technique. Breaking strength was assessed using a tensile machine in two ways, i.e., axial or pulley load, with 20 sutures per group. Results: The strongest suture for both axial and pulley load was the cruciate four-strand suture. Between the multistrand running suture and the modified Kessler suture, there was no statistically significant difference in the strength of breaking for both axial and pulley load. Comparing the two ways of breaking, there was no statistically significant difference in the strength of the suture. Conclusions: The multistrand running locking suture is a good alternative to widely used core sutures. It not only provides the same strength as other techniques examined by us but also reduces the procedure time and trauma to the tips of the tendon.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 167-172
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How foot morphology changes influence shoe comfort and plantar pressure before and after long distance running?
Autorzy:
Mey, Q.
Gu, Y.
Sun, D.
Fernandez, J.
Powiązania:
https://bibliotekanauki.pl/articles/306388.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ciśnienie podeszwowe
obuwie
kształt stopy
komfort
bieg długodynstansowy
foot shape
plantar pressure
footwear
comfort
long distance running
Opis:
Prolonged running has been popularized globally in recent decades. This study was aimed to reveal information about foot morphology, shoe comfort and plantar loading among recreational heel-strike runners. Methods: Twenty-six runners participated in foot morphology, perceived scores and peak pressure tests after 10- and 20-km track running. The foot morphology was measured using a 3D foot scanner, perceived scores were recorded using a visual analogue scale and plantar pressure was measured via insole plantar pressure measurement system. The statistical significance level was set at 0.05. Results: The heel midsole materials properties were measured before and after 20 km. Significant changes were observed in ball width and girth, arch height and foot volume. The perceived scores showed significance in overall, forefoot and heel comfort, arch support and forefoot width. Peak pressure to the heel, medial mid-foot and metatarsal greatly increased. The first metatarsal showed consecutive increase from static to 10 km, and 20 km, while big-toe showed a decrease. Conclusions: The morphology variations and forefoot loading concentration may lead to discomfort and possibly imply dermatological problems and metatarsal bone stress, particularly on the first metatarsal. Combining changes of heel midsole property, knowledge of foot shape, shoe perception and plantar pressure is of great value for recreational long-distance running shoes design and materials selection.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 2; 179-186
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Difference of walking plantar loadings in experienced and novice long-distance runners
Autorzy:
Gao, Zixiang
Mei, Qichang
Xiang, Liangliang
Gu, Yaodong
Powiązania:
https://bibliotekanauki.pl/articles/27324132.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
prolonged running
novice
experienced
plantar pressure
statistical parametric mapping
długotrwałe bieganie
nowicjusz
doświadczony
ciśnienie podeszwowe
statystyczne mapowanie parametryczne
Opis:
Purpose: Long-distance running has been a global popularity, and differences may be observed in runners of experience. This study was aimed to evaluate the differences in plantar loading between experienced long-distance runners and novice runners during walking. The hypotheses were that smaller load in the middle of the forefoot and the stable foot balance would be observed in experienced runners during walking. Methods: Twenty-five participants were recruited as the experienced runners group (ten: frequency ≥ 4 times/week and distance ≥ 40 km/week, for over 1 year) and the novice group (fifteen: frequency ≤ 2 times/week and distance ≤ 10 km/week, for less than 1 year). Results: The peak Meta loading showed that the novice runners were significantly larger than the experienced runners ( p ≤ .001). The occurring time of peak Meta loading was significantly delayed compared to the experienced runners ( p = .050). Peak Foot balance was higher in the novice runners group ( p ≤ 0.001). Conclusions: This study highlighted the findings of the potential differences of plantar pressures and foot functional parameters during walking in experienced runners and novice runners, specifically the contact duration of phases during stance, toes functions and medial-lateral loading shifting (foot balance) and metatarsals (central forefoot) offloading.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 3; 85--93
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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