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THE ANALYSIS OF THE EFFECT OF WEIGHTLIFTING SHOES AND BAREFOOT ON THE PERFORMANCE MEASURES OF BACK SQUAT
Dobeš, Adam ; Jebavý, Radim (advisor) ; Šťastný, Petr (referee)
Title: The Analysis of the Effect of Weightlifting Shoes and Bare Feet Lifting on the Performance Measures of Back Squat. Objectives: The main goal of this study was to compare speed, power, and depth of the back squat performed both barefoot and in weightlifting shoes using the training protocol 5 × 5 (5 sets with 5 reps) at 70 % one-repetition maximum (1RM). Methods: Ten elite, male participants (27 ± 3.54 years old, 93 ± 10.23 kg of body weight, 179.28 ± 8.54 cm of height) were involved and assessed for the purposes of the study. All participants' 1RM back squat was not lower than 1.5 times of their body weight and they all had many years of experience using weightlifting as a part of their athletic development. The assessment was carried out at the training adaptation lab of the Department of Physiology and Biochemistry, the Faculty of Physical Education and Sport, Charles University in Prague (UK FTVS). Each participant followed the same training protocol during two sessions not less than 48 hours apart; the first one performed barefoot and the second one wearing the weightlifting shoes. Participants were asked to perform three repetitions, first with 20 % of their estimated 1RM, then with 40 % and 60 %, followed by two repetitions with 70 % and 80 % of their estimated 1RM to determine their...
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Analysis and comparasion of squat exercise due to surface EMG
Orava, Boris ; Kračmar, Bronislav (advisor) ; Jebavý, Radim (referee)
ABSTRACT Title of dissertation: Analysis and comparasion of squat exercise due to surface EMG Objectives of dissertation: To measure and describe the structure involving specific muscles durring back squat, front squat and smith machine squat exercise. Method: Surface EMG analysis and simple kinematic analysis. Results: Activation of m. gluteus maximus was highest after the start of excentric movement. Main muscle working on the chase between the concentric and excentric movement was m. rectus femoris. Very similar timing and synergy were between m. erector spinae and m. biceps femoris. In this study was not higher activation of m. quadriceps femoris during front squat exercise, activation of m. gluteus maximus were also higher. Key words: squat, strengthening, bar, front squat, back squat, Smith machine squat, bodybuilding, weightlifting, powerlifting, EMG analysis, kinematic analysis 6
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