|
|
The effect of various breathing variations on intra-thoracic pressure, bar kinematics and muscle activity in bench press exercise.
Blažek, Dušan ; Šťastný, Petr (advisor) ; Vágner, Michal (referee)
Title: The effect of breathing technique on intra-thoracic pressure, kinematics of barbell, and muscle activity during bench press exercise. Objectives: The main aim of this study is to determine relationship between breathing technique and bench press exercise. Furthermore, determine which breathing modification leads to overcoming highest resistance and how each individual breathing techniques (Valsalva maneuver (VM), Hold breath (HB), Lung packing (PAC), "reversed breathing" (REVB)) affects kinematics of barbell, and muscle activity, during different intensity (1 RM, 4RM, 8RM, 12RM). Methods: Experiment of cross-sectional character, with usage of our-calibrated sensor, for intrathoracic pressure measurements, 3D kinematics with passive markers and surface electromyography. For measuring anthropometric measurements was further used goniometer, digital scale, and measuring tape. Comparisons of the breathing techniques was done by analysis of covariance ANOVA, while particular parameters were compared by Pearson correlation. Results: Except of REVB technique, which indicated significantly lower load, there was no significant difference between techniques in lifted resistance. Similar effect was observed at results of intrathoracic pressure, where REVB technique showed significantly lower pressure,...
|
|
|
The effect of various breathing variations on intra-thoracic pressure, bar kinematics and muscle activity in bench press exercise.
Blažek, Dušan ; Šťastný, Petr (advisor) ; Vágner, Michal (referee) ; Farana, Roman (referee)
Title: The effect of breathing technique on intra-thoracic pressure, kinematics of barbell, and muscle activity during bench press exercise. Objectives: The main aim of this study is to determine relationship between breathing technique and bench press exercise. Furthermore, determine which breathing modification leads to overcoming highest resistance and how each individual breathing techniques (Valsalva maneuver (VM), Hold breath (HB), Lung packing (PAC), "reversed breathing" (REVB)) affects kinematics of barbell, and muscle activity, during different intensity (1 RM, 4RM, 8RM, 12RM). Methods: Experiment of cross-sectional character, with usage of our-calibrated sensor, for intrathoracic pressure measurements, 3D kinematics with passive markers and surface electromyography. For measuring anthropometric measurements was further used goniometer, digital scale, and measuring tape. Comparisons of the breathing techniques was done by analysis of covariance ANOVA, while particular parameters were compared by Pearson correlation. Results: Except of REVB technique, which indicated significantly lower load, there was no significant difference between techniques in lifted resistance. Similar effect was observed at results of intrathoracic pressure, where REVB technique showed significantly lower pressure,...
|
|
|
Muscle activity in sticking region during flat bench press
Kopecký, Václav ; Šťastný, Petr (advisor) ; Petr, Miroslav (referee)
Title: Muscle activity when surpassing the sticking region in the concentric phase of a bench-press Objectives: The aim of this work is to compare muscle activity of prime movers and stabilizing muscles in each region of the concentric phase in a bench- press (pre-sticking, sticking and post-sticking phase). Methods: To get all the necessary data a method of randomized experimental research was used in preset laboratory conditions. Afterward a method of analysis was used for data evaluation. Results: Neuromuscular fatigue had occurred at submaximal (4 RM) loads in the primary movers during the sticking and post-sticking phase. In case of maximal (1 RM) loads the hypothesis was rejected due to that fatigue had occurred later, during post-sticking phase. Furthermore a neuromuscular fatigue of stabilizing muscles during maximal (1 RM) and submaximal (4 RM) loads was found. Keywords: bench-press, sticking region, sticking point, electromyography, EMG, muscle activity, resistance training
|
|
|
The anthopometric relation to bench press performance and sticking region
Široký, Michal ; Šťastný, Petr (advisor) ; Petr, Miroslav (referee)
Title: The anthopometric relation to bench press performance and sticking region Objectives: The aim of the thesis is to determine the influence of anthropometric parameters on the performance in bench press and its critical phase of motion. Another objective of this work is to determine the differences of influence anthropometry between 1 RM, 4 RM, 8 RM and 12 RM as well as anthropometric impact on the area occurring before the critical phase of motion and on the area after the critical phase of motion. Methods: This is a quantitative research based on the comparison of measured anthropometric parameters with performance and kinematics by bench press analysis. For experimental methods it was used laboratory conditions and it was used methods of analysis to evaluate the acquired data. Results: The results of the work show that anthropometric parameters affect the performance especially at 1 RM and 12 RM. Overall, the forearm has the greatest impact, reaching a strong negative correlation r = -0.69. Lower arm abduction at 12 RM has a large correlation coefficient r = 0.68, and the chest ratio with upper limb length has a mean positive correlation r = 0.55 for 1 RM and 12 RM. The influence of anthropometry on the critical phase of motion has not been confirmed. Only the correlation between...
|
guest ::
