Papers by Mohamed Abdelsattar
The aim of the present study was to investigate the effects of high intensity interval training (... more The aim of the present study was to investigate the effects of high intensity interval training (HIIT) using the elevation training mask (ETM) on the aerobic capacity (VO2max) and heart rate variability (HRV) for trained athletes. Accordingly, the HRV investigated parameters in this research are mean of the time interval between R-Rms of the QRS complex, High frequency peak (HFPeak)(0.15-0.4 Hz), Low frequency peak (LFPeak) (0.04-0.15 Hz). 12 physically active male soccer players from University of Mansoura were accepted to participate in this study (mean + SD: 21.58+ 0.67 years, 177.8+7.11 cm, 71.33 + 6.65 kg). Individuals were randomly assigned to a mask group (MG) and a control group (CG). An eight week HIIT program was applied three times per week on both MG and CG. Post-test protocol was performed four days after the last training session. Results indicates significant differences between pre-and post-measurements in VO2max (p<0.05) with both MG and CG for post-measurement. ...
The purpose of this study was to investigate the relationship between Achilles tendon stiffness a... more The purpose of this study was to investigate the relationship between Achilles tendon stiffness and ground contact time (GCT) during drop jumps. The property of "springiness" and a short GCT during the movement is required in several types of sports. Therefore, a stiff tendon might be advantageous due to the quick force transmission from the muscle to the bone. Hence, a secondary aim was to relate Achilles tendon stiffness with squat jump (SJ) and counter movement jump (CMJ) performance, respectively. Nineteen physically active healthy males (mean ± SD: 26.7 ± 3.9 years, 1.77 ± 0.07 m, 76.5 ± 6.7 kg) participated in this study. Subjects were asked to perform squat jumps and counter movement jumps to determine jump height, and drop jumps were undertaken on a force plate to determine GCT. We then simultaneously measured isometric maximum voluntary contraction (MVIC) of the plantar flexors with a dynamometer and recorded the elongation of the tendon with ultrasound; hence, we could calculate tendon stiffness. The results show a correlation between GCT and Achilles tendon stiffness (r = −0.50) and MVIC (r = −0.48), respectively. Achilles tendon stiffness was not significantly correlated with squat jump and counter movement jump height, respectively. According to the results, we can confirm the main hypothesis that a stiff Achilles tendon tends to result in a shorter GCT during drop jumps. However, Achilles tendon stiffness does not appear to be a key determinant in jumping performance.
The purpose of this study was to investigate the relationship between Achilles tendon stiffness a... more The purpose of this study was to investigate the relationship between Achilles tendon stiffness and ground contact time (GCT) during drop jumps. The property of "springiness" and a short GCT during the movement is required in several types of sports. Therefore, a stiff tendon might be advantageous due to the quick force transmission from the muscle to the bone. Hence, a secondary aim was to relate Achilles tendon stiffness with squat jump (SJ) and counter movement jump (CMJ) performance, respectively. Nineteen physically active healthy males (mean ± SD: 26.7 ± 3.9 years, 1.77 ± 0.07 m, 76.5 ± 6.7 kg) participated in this study. Subjects were asked to perform squat jumps and counter movement jumps to determine jump height, and drop jumps were undertaken on a force plate to determine GCT. We then simultaneously measured isometric maximum voluntary contraction (MVIC) of the plantar flexors with a dynamometer and recorded the elongation of the tendon with ultrasound; hence, we...
The aim of the present study was to investigate the effects of high intensity interval training (... more The aim of the present study was to investigate the effects of high intensity interval training (HIIT) using the elevation training mask (ETM) on the aerobic capacity (VO2max) and heart rate variability (HRV) for trained athletes. Accordingly, the HRV investigated parameters in this research are mean of the time interval between R-Rms of the QRS complex, High frequency peak (HFPeak)(0.15-0.4 Hz), Low frequency peak (LFPeak) (0.04-0.15 Hz). 12 physically active male soccer players from University of Mansoura were accepted to participate in this study (mean + SD: 21.58+ 0.67 years, 177.8+7.11 cm, 71.33 + 6.65 kg). Individuals were randomly assigned to a mask group (MG) and a control group (CG). An eight week HIIT program was applied three times per week on both MG and CG. Post-test protocol was performed four days after the last training session. Results indicates significant differences between pre-and post-measurements in VO2max (p<0.05) with both MG and CG for post-measurement. ...
The purpose of this study was to investigate the relationship between Achilles tendon stiffness a... more The purpose of this study was to investigate the relationship between Achilles tendon stiffness and ground contact time (GCT) during drop jumps. The property of " springiness " and a short GCT during the movement is required in several types of sports. Therefore, a stiff tendon might be advantageous due to the quick force transmission from the muscle to the bone. Hence, a secondary aim was to relate Achilles tendon stiffness with squat jump (SJ) and counter movement jump (CMJ) performance, respectively. Nineteen physically active healthy males (mean ± SD: 26.7 ± 3.9 years, 1.77 ± 0.07 m, 76.5 ± 6.7 kg) participated in this study. Subjects were asked to perform squat jumps and counter movement jumps to determine jump height, and drop jumps were undertaken on a force plate to determine GCT. We then simultaneously measured isometric maximum voluntary contraction (MVIC) of the plantar flexors with a dynamometer and recorded the elongation of the tendon with ultrasound; hence, ...
The <b>aim</b> of the present research was to investigate the effect of an eight week... more The <b>aim</b> of the present research was to investigate the effect of an eight week motor coordination program using elastic bands on speed, agility, and power for 15 year old soccer juniors. it was <b>hypothesized</b> that involving the elastic resistance bands during motor coordinative and soccer specific tasks would significantly improve speed, agility and power for 15 year old soccer juniors. The quasi experimental design was applied on a sample 30 healthy and physically active male soccer juniors of Mansoura club (mean + SD: 15.38+ 0.67 years, 165.8+7.11 cm, 57.33 + 5.65 kg). They were randomly assigned to two groups. An experimental group (15 juniors) which trained using the motor coordination program using the elastic resistance bands (EXG) and a control group (15 juniors) which trained using the motor coordination program without elastic resistance bands (CG). Result showed a statistically significant improvement in vertical jump, movement speed, ag...
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Papers by Mohamed Abdelsattar