Effect of Descent Velocity upon Muscle Activation and Performance in Two-Legged Free Weight Back Squats
Abstract
:1. Introduction
2. Materials and Methods
2.1. Subjects
2.2. Procedures
2.3. Statistical Analysis
3. Results
4. Discussion
5. Conclusions
Funding
Conflicts of Interest
References
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Events | Interval (s) | Velocity (m/s) | Displacement Barbell (m) | Maximal Force (F) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Fast | Normal | Slow | Fast | Normal | Slow | Fast | Normal | Slow | Fast | Normal | Slow | |
Repetition 2 | ||||||||||||
Vdown | 0.43 ± 0.11 * | 0.82 ± 0.29 * | 1.72 ± 0.80 * | −1.03 ± 0.17 * | −0.74 ± 0.15 * | −0.44 ± 0.12 * | 0.26 ± 0.10 * | 0.38 ± 0.16 | 0.40 ± 0.20 | |||
V0 | 0.61 ± 0.22 | 0.56 ± 0.27 | 0.88 ± 0.52 | 0.41 ± 0.09 * | 0.28 ± 0.15 | 0.25 ± 0.16 | 3195 ± 792 | 3067 ± 686 | 2778 ± 559 * | |||
Vmax1 | 0.24 ± 0.07 | 0.25 ± 0.06 | 0.28 ± 0.07 * | 0.55 ± 0.12 | 0.54 ± 0.10 | 0.47 ± 0.11 * | 0.10 ± 0.04 | 0.09 ± 0.03 | 0.09 ± 0.03 | |||
Vmin | 0.43 ± 0.12 | 0.40 ± 0.16 | 0.43 ± 0.11 | 0.32 ± 0.13 | 0.34 ± 0.14 | 0.30 ± 0.11 | 0.16 ± 0.03 | 0.15 ± 0.04 | 0.15 ± 0.03 | |||
Vmax2 | 0.60 ± 0.16 | 0.63 ± 0.15 | 0.66 ± 0.17 | 0.93 ± 0.21 | 0.86 ± 0.23 | 0.86 ± 0.17 | 0.31 ± 0.03 | 0.31 ± 0.03 | 0.31 ± 0.04 | |||
Repetition 3 | ||||||||||||
Vdown | 0.43 ± 0.09 * | 0.86 ± 0.34 * | 1.59 ± 0.77 * | −0.98 ± 0.21 * | −0.72 ± 0.18 * | −0.44 ± 0.10 * | 0.24 ± 0.10 * | 0.39 ± 0.15 | 0.39 ± 0.19 | |||
V0 | 0.67 ± 0.27 | 0.54 ± 0.22 | 0.89 ± 0.58 | 0.42 ± 0.08 * | 0.27 ± 0.14 | 0.26 ± 0.17 | 3254 ± 842 | 3070 ± 743 | 2772 ± 551 * | |||
Vmax1 | 0.24 ± 0.06 | 0.24 ± 0.05 | 0.27 ± 0.07 * | 0.56 ± 0.14 | 0.52 ± 0.14 | 0.44 ± 0.12 * | 0.09 ± 0.03 | 0.09 ± 0.02 | 0.08 ± 0.02 | |||
Vmin | 0.42 ± 0.19 | 0.45 ± 0.14 | 0.48 ± 0.12 | 0.33 ± 0.16 | 0.29 ± 0.13 ↓ | 0.25 ± 0.10 ↓† | 0.16 ± 0.04 | 0.16 ± 0.03 | 0.15 ± 0.03 | |||
Vmax2 | 0.66 ± 0.24 | 0.70 ± 0.24 | 0.80 ± 0.28 ↓ | 0.87 ± 0.25 ↓ | 0.86 ± 0.24 | 0.82 ± 0.17 ↓ | 0.30 ± 0.03 | 0.31 ± 0.04 | 0.32 ± 0.05 | |||
Repetition 4 | ||||||||||||
Vdown | 0.43 ± 0.11 * | 0.85 ± 0.40 * | 1.82 ± 0.78 * | −0.99 ± 0.20 * | −0.72 ± 0.17 * | −0.40 ± 0.12 * | 0.26 ± 0.12 * | 0.38 ± 0.17 | 0.42 ± 0.17 | |||
V0 | 0.65 ± 0.27 | 0.57 ± 0.28 | 0.85 ± 0.48 | 0.41 ± 0.10 * | 0.29 ± 0.15 | 0.22 ± 0.14 | 3203 ± 880 | 3112 ± 741 | 2690 ± 474 * | |||
Vmax1 | 0.23 ± 0.05 | 0.23 ± 0.05 | 0.26 ± 0.06 * | 0.54 ± 0.14 | 0.54 ± 0.14 | 0.42 ± 0.11 * | 0.09 ± 0.02 | 0.09 ± 0.02 | 0.08 ± 0.03 | |||
Vmin | 0.50 ± 0.20 ↓ | 0.48 ± 0.12 ↓ | 0.59 ± 0.27 ↓ | 0.28 ± 0.15 ↓↓ | 0.25 ± 0.13 ↓ | 0.19 ± 0.08 ↓↓† | 0.17 ± 0.04 | 0.16 ± 0.02 | 0.15 ± 0.05 | |||
Vmax2 | 0.77 ± 0.31 ↓ | 0.83 ± 0.35 ↓ | 0.87 ± 0.26 ↓ | 0.85 ± 0.26 ↓ | 0.82 ± 0.26 | 0.78 ± 0.19 ↓ | 0.31 ± 0.04 | 0.32 ± 0.04 | 0.31 ± 0.05 |
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Van den Tillaar, R. Effect of Descent Velocity upon Muscle Activation and Performance in Two-Legged Free Weight Back Squats. Sports 2019, 7, 15. https://doi.org/10.3390/sports7010015
Van den Tillaar R. Effect of Descent Velocity upon Muscle Activation and Performance in Two-Legged Free Weight Back Squats. Sports. 2019; 7(1):15. https://doi.org/10.3390/sports7010015
Chicago/Turabian StyleVan den Tillaar, Roland. 2019. "Effect of Descent Velocity upon Muscle Activation and Performance in Two-Legged Free Weight Back Squats" Sports 7, no. 1: 15. https://doi.org/10.3390/sports7010015