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    Wyświetlanie 1-4 z 4
    Tytuł:
    A new hand dynamometer activforce isometric muscle activation on single joint muscle force of volleyball players
    Autorzy:
    Kahraman, Yeliz
    Powiązania:
    https://bibliotekanauki.pl/articles/34671012.pdf
    Data publikacji:
    2024-02-23
    Wydawca:
    Akademia Tarnowska
    Tematy:
    isometric force
    peak
    average
    volleyball players
    Opis:
    Isometric muscle activation of single joint to volleyball players is critic on sport performance to produce potential muscle force, however isometric measurement limited in isokinetic muscle activity measurement of volleyball players. Indeed, hand dynamometers commonly use in various body isometric force. Professional volleyball players age 16.23 ± 0.59 yr, body mass 60.22 ± 4.64 kg, hight 1.69 ± 0.04 m participated to peak and average isometric force measurement over 8 week pre and post test. Accordingly, single joint muscle force production measurement of volleyball players tested on isometric muscle activation using a new hand dynamometer activforce 2. Isometric muscle activation tests consisted of 24 body region from upper and lower compartment. For this isometric muscle action test detected on peak force outcomes (SEM: 37.90; CV: 1.79) and average force outcomes (SEM: 33.62; CV: 1.84). The high isometric muscle action joint loading performing mechanical test application recommended on athletic population to using isometric potential high contraction model by strength training performance separately in-season and off-season measurement modeling. Conclusion, peak and average force production progressive isometric modeling of volleyball athletes worked to current sport–health condition. As out, conclusion must be advanced isometric force measurement proper work in sport-specific tasks. The proper isometric force must be repeat sport performance outcome in different sport modalities.
    Źródło:
    Health Promotion & Physical Activity; 2023, 25, 4; 22-30
    2544-9117
    Pojawia się w:
    Health Promotion & Physical Activity
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deep tissue massage and flexibility in the structural components of the superficial back line of professional volleyball players: a pilot study.
    Autorzy:
    Steuer, M.
    Jędrzejewski, G.
    Dolibog, P.
    Kasper-Jędrzejewska, M.
    Mroczek, A.
    Kaczorowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2088234.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Opolski. Instytut Nauk o Zdrowiu
    Tematy:
    deep tissue massage
    superficial back line
    volleyball players
    Opis:
    Background: Massage is a common treatment in physiotherapy, often used as a prophylaxis or during recovery following a musculoskeletal contusion. One form of therapeutic massage is deep tissue massage (DTM), which has become more popular in recent years as a way of performing targeted work with the myofascial system. Aim of the study: The aim of the study was to examine the effectiveness of deep tissue massage on superficial back line flexibility (hip flexion and knee extension range of motion – ROM). Material and methods: Elite volleyball players (n=15), age: 22.8 ± 4.41 years; mass: 82.67 ± 6.99 kg; height: 1.96 ± 0.08 m) were recruited for this study. Deep tissue massage of the myofascial superficial back line was performed from the plantar fascia through the gastrocnemius and soleus muscles, the hamstrings to the ischial tuberosity (based on Myers, 2014). Hip flexion and knee extension ROM were measured at rest both before and after DTM. The Wilcoxon signed-rank test was used to compare pre and post values during the intervention. Results: Following deep tissue massage, there was significant improvement in superficial back line flexibility, demonstrated by an increase in hip flexion angle compared to pre-DTM values in both lower limbs. Right lower limb pre-DTM 1.86±0.66; post 2.79±0.43 (p<0.005), left lower limb pre-DTM 2.36±0.74; post 2.79±0.43 (p<0.028). There was also significant improvement in superficial back line flexibility demonstrated by an increase in knee extension angle post-DTM in both lower limbs. Right lower limb pre-DTM 69.79°±10.8; post 81.43°±6.06, left lower limb pre-DTM 73.07°±11.45, post 82.50°±8.39). Conclusions: Deep tissue massage increases the flexibility of the superficial back line and can be used as a form of increasing range of motion in the hips and knees.
    Źródło:
    Medical Science Pulse; 2019, 13, 3; 29-34
    2544-1558
    2544-1620
    Pojawia się w:
    Medical Science Pulse
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Somatotype : variables related to muscle torque and power output in female volleyball players
    Autorzy:
    Buśko, K.
    Lewandowska, J.
    Lipińska, M.
    Michalski, R.
    Pastuszak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307269.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    female
    volleyball players
    somatotype
    strength
    power
    jump
    wytrzymałość
    energia
    skok
    Opis:
    The purpose of this study was to investigate the relationship between somatotype, muscle torque, maximal power output and height of rise of the body mass centre measured in akimbo counter movement jump (ACMJ), counter movement jump (CMJ) and spike jump (SPJ), and power output measured in maximal cycle ergometer exercise bouts in female volleyball players. Fourteen players participated in the study. Somatotype was determined using the Heath–Carter method. Maximal muscle torque was measured under static conditions. Power output was measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight (BW). All jump trials (ACMJ, SPJ and CMJ) were performed on a force plate. The mean somatotype of volleyball players was: 4.9-3.5-2.5. The value of the sum of muscle torque of the left upper extremities was significantly correlated only with mesomorphic component. Mesomorphic and ectomorphic components correlated significantly with values of maximal power measured during ACMJ and CMJ. Power output measured in maximal cycle ergometer exercise bouts at increasing external loads equal to 2.5, 5.0 and 7.5% of BW was significantly correlated with endomorphy, mesomorphy and ectomorphy.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 2; 119-126
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in electromyographic signals and skin temperature during standardised effort in volleyball players
    Autorzy:
    Kuniszyk-Jóźkowiak, W.
    Jaszczuk, J.
    Czaplicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307133.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    termografia
    zmienność temperatury
    siatkówka
    sygnał elektromiograficzny
    thermography
    temperature variability
    volleyball players
    electromyographic signals
    standardised effort
    Opis:
    The state of athletes’ muscles is not constant, but it differs depending on the stage of sports training, which is associated with different degrees of muscle fatigue. There is thus a need to find a non-invasive and simple method to assess muscle fatigue. The aim of the study was to determine the relationship between muscle fatigue due to physical effort and changes in skin temperature, measured using a thermographic camera. Methods: The study involved 12 volleyball players. The participants were to maintain 70% of peak torque in the joint for as long as possible. We measured peak torque and the time of maintaining 70% of its value (tlim) as well as continuously recording skin temperature and electromyographic (EMG) signals in the region of the belly of the rectus femoris. The measurements were taken twice: before and after a series of squats. Results: The study found that tlim decreased when isometric contraction was performed after physical effort. Pre- and post-exercise skin temperature did not differ significantly, however, the increase rates of temperature and the root mean square (RMS) of the EMG signals grew significantly. In most of the players, skin temperature also correlated with the RMS, median frequency (MDF), and mean frequency (MF) of the EMG signals. Conclusions: Measuring the time of maintaining submaximal torque during isometric contraction and the slope coefficient for the increase in temperature recorded using a thermographic camera can be a simple, cost-effective, and non-invasive method of assessing fatigue and efficiency decreases in the muscles in volleyball players.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 3; 115-122
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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