Journal Article10.1519/JSC.0B013E3182510827N
The effect of loading on kinematic and kinetic variables during the midthigh clean pull.
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TL;DR: If maximizing force production is the goal, then training at a higher load may be advantageous, with peak Fz occurring at 140% 1RM, and decreases in peak power and peak velocity during the midthigh clean pull.
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Abstract: The ability to develop high levels of muscular power is considered a fundamental component for many different sporting activities; however, the load that elicits peak power still remains controversial. The primary aim of this study was to determine at which load peak power output occurs during the midthigh clean pull. Sixteen participants (age 21.5 ± 2.4 years; height 173.86 ± 7.98 cm; body mass 70.85 ± 11.67 kg) performed midthigh clean pulls at intensities of 40, 60, 80, 100, 120, and 140% of 1 repetition maximum (1RM) power clean in a randomized and balanced order using a force plate and linear position transducer to assess velocity, displacement, peak power, peak force (Fz), impulse, and rate of force development (RFD). Significantly greater Fz occurred at a load of 140% (2,778.65 ± 151.58 N, p < 0.001), impulse within 100, 200, and 300 milliseconds at a load of 140% 1RM (196.85 ± 76.56, 415.75 ± 157.56, and 647.86 ± 252.43 N·s, p < 0.023, respectively), RFD at a load of 120% (26,224.23 ± 2,461.61 N·s-1, p = 0.004), whereas peak velocity (1.693 ± 0.042 m·s-1, p < 0.001) and peak power (3,712.82 ± 254.38 W, p < 0.001) occurred at 40% 1RM. Greatest total impulse (1,129.86 ± 534.86 N·s) was achieved at 140% 1RM, which was significantly greater (p < 0.03) than at all loads except the 120% 1RM condition. Results indicate that increased loading results in significant (p < 0.001) decreases in peak power and peak velocity during the midthigh clean pull. Moreover, if maximizing force production is the goal, then training at a higher load may be advantageous, with peak Fz occurring at 140% 1RM.
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Developing maximal neuromuscular power: part 2 - training considerations for improving maximal power production.
TL;DR: This series of reviews focuses on the most important neuromuscular function in many sport performances, the ability to generate maximal muscular power, and the factors that affect maximal power production.
The effect of heavy- vs. light-load jump squats on the development of strength, power, and speed.
TL;DR: This investigation indicates that training with light-load jump squats results in increased movement velocity capabilities and that velocity-specific changes in muscle activity may play a key role in this adaptation.
Power and Maximum Strength Relationships During Performance of Dynamic and Static Weighted Jumps
Michael H. Stone,Harold S. O'Bryant,Lora B. McCOY,Robert Coglianese,Mark Lehmkuhl,Brian K. Schilling +5 more
TL;DR: Investigation of the relationship of the 1 repetition maximum (1RM) squat to power output during countermovement and static weighted vertical squat jumps suggests that improving maximum strength should be a primary component of training programs and that strength training should shift from lighter to heavier loads.
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Effects of maximal effort strength training with different loads on dynamic strength, cross-sectional area, load-power and load-velocity relationships.
TL;DR: In conclusion, training with loads of 15% and 35% of 1RM resulted in an increase in 1RM, and the high correlation between 1RM and maximal power at load 2.5 kg also would indicate that maximal strength is important for performance at light loads.
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