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Power (along with Impulse) is arguably the most import characteristic for an athlete to develop. Power (particularly peak power) has strong relationships with sports performance such as lifting, throwing, sprinting, jumping and agility. Development of power is best accomplished by a progressive sequence that is characterized by successive phases that increased work capacity, muscle cross-section area, maximum strength and task specific power. Furthermore, evidence indicates that for power development, weaker athletes benefit as much or more from the development of strength through basic strength training than from power training.

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Principles and Practice of Resistance Training represents a true breakthrough in planning and monitoring strength training programs. This research-based book details how to systematically examine the physical, physiological, and biomechanical parameters associated with crafting resistance training programs to improve sport performance and strength and power in athletes. The authors bring together more than 100 collective years of teaching, conducting research, and coaching national- and international-level athletes to share their unique insights concerning adaptations to strength and conditioning. The text is written in a manner that challenges professionals while remaining accessible to advanced coaches. It begins by presenting readers with an understanding of basic science. This scientific foundation allows readers to formulate a sound training process that is more likely to produce the desired short- and long-term results. Next, the text examines how to test, monitor, and evaluate adaptations to various types of training programs. It emphasizes the significance of appropriately monitoring training programs to identify elements of the program to adjust so the goals of clients or athletes are more effectively and efficiently achieved. Finally, the authors discuss exercise selection and present a practical example so readers can learn to apply the information in the text to build their own training programs. Each chapter is written in a “stand-alone” manner so that readers can refer back to the material as needed. Principles and Practice of Resistance Training also explores key questions that currently have no clear, scientifically proven answers. For these issues, the authors offer reasoned, speculative explanations based on the best available information and data—including anecdotal evidence— intended to stimulate additional observation and research that will eventually offer a clearer understanding and resolution of the issues involved. In sharing their personal experiences as coaches and research scientists, the authors are able to address issues that are not normally dealt with in academic programs. Principles and Practice of Resistance Training is far more than a general guide for strength training. It is an in-depth exploration of the science behind the training. Armed with the scientific understanding and the tools to put that information into practice, you will be able to develop training programs that help your athletes or clients excel. / https://dc.etsu.edu/etsu_books/1206/thumbnail.jpg

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Glaister, M., M.H. Stone, A.M. Stewart, M.G. Hughes, and G.L. Moir. The influence of endurance training on multiple sprint cycling performance. J. Strength Cond. Res. 21(2):606-612. 2007. - The aims of the present study were to examine the effects of endurance training on multiple sprint cycling performance and to evaluate the influence of recovery duration on the magnitude of those effects. Twenty-one physically active male university students were randomly assigned to either an experimental (n = 12) or a control (n = 9) group. The experimental group cycled for 20 minutes each day, 3 times per week, for 6 weeks at 70% of the power output required to elicit maximal oxygen uptake (Vo2max). Multiple sprint performance was assessed using 2 maximal (20 × 5 seconds) sprint cycling tests with contrasting recovery periods (10 or 30 seconds). All tests were conducted on a friction-braked cycle ergometer. Relative to controls, training resulted in a 0.2 L·min -1 increase in mean Vo2max (95% likely range: -0.04 to 0.44 L·min-1). Changes in anaerobic capacity (determined by maximal accumulated oxygen deficit) over the same period were trivial (p = 0.96). After training, the experimental group showed significant improvements (∼40 W), relative to controls, in multiple sprint measures of peak and mean power output. In contrast, training-induced reductions in fatigue were trivial (p = 0.63), and there were no significant between-protocol differences in the magnitude of any effects. In summary, 6 weeks of endurance training resulted in substantial improvements in multiple sprint cycling performance, the magnitude of the improvements being largely unaffected by the duration of the intervening recovery periods.

ABSTRACT: Wong, H, Gentles, J, Bazyler, C, and Ramsey, M. Exploring the utility of performing a down set as a postactivation potentiation strategy. J Strength Cond Res 35(5): 1217-1222, 2021-The purpose of this study was to determine if successive heavy sets of back squats can augment the concentric velocity of a lighter down set performed by strength-trained men. Twelve trained men with experience in the back squat volunteered to perform a 5 repetition maximum (5RM) along with 2 separate squat sessions consisting of 3 sets of 5 repetitions with 85% of their 5RM. One condition involved performing a "down set" (DS) after the 3 working sets at 85% of 5RM equivalent to 60% of the working-set load that was also performed during the warm-up. A "No down set" condition involved performing an additional warm-up set before the working sets with 60% of the working-set load instead of the down set to determine if velocity was augmented because of postactivation potentiation in the DS condition. In both conditions, 3 minutes of rest was applied between all sets. A paired sample t-test was used to compare the mean concentric velocities (MCVs) of the working sets of both conditions, and a repeated measures analysis of variance was used to assess differences in MCVs between sets performed at 60% of the working-set load. Cohen's d effect sizes were reported for all comparisons, and the critical alpha was set at p ≤ 0.05. No significant differences were observed in the working-set MCVs in both conditions (p = 0.412, d = 0.246) or between MCVs in the down set and equivalent warm-up set load in the DS condition (p = 0.270, d = 0.002).Although performing a down set may still be efficacious for developing power across a broad spectrum of loads, the results of this study suggest successive heavy sets of back squats do not acutely augment down set concentric velocity in strength-trained men.