Two factors that determine running speed are stride cadence and stride length. Because athletes propel themselves forward only when their foot is in contact with the ground, the stance phase of the running stride should be the focus of speed enhancement programs.

This excerpt breaks down the optimal positions of the body during acceleration and deceleration.

Acceleration and maximal velocity are two factors that are key for any position in football and can determine success in many situations out on the field. This article will review several aspects of sprint mechanics and training to enhance linear (straight-ahead) speed for football players.

This book excerpt is an overview of the fundamentals to sprinting mechanics and technique. It also covers starting, acceleration, drive phase, recovery phase, and deceleration.

Acceleration is the rate of change in velocity, so this phase of sprinting is critical for changing directions as rapidly and efficiently as possible. Optimal technique for linear sprinting in the acceleration phase involves four factors that maximize stride length and frequency.

This article seeks to provide some insight to optimal biomechanics in running technique and why normal gravitational techniques may not suit tactical athletes while load-bearing.

Gary Boros, Assistant Sport Performance Coach at the University of Denver, talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about being flexible in your programming and with your staff, not always grinding your athletes into the ground, and the need to learn from others.

Various methods of eccentric training that aim to increase muscle mass or reduce ground contact time during a landing task have been extensively researched and practically examined. However, multiple methods to implement eccentric training currently exist; they differ in execution and intended training adaptions. There is a clear differentiation between an eccentric muscle action and an eccentric motion whereby a motion alludes to a downward movement of an exercise. The proposed eccentric motions are dissipating eccentrics, deceleration eccentrics, overcoming eccentrics, maximal eccentrics, and rebound eccentrics. These motions formulate into training methods and cues to allow practitioners to clearly differentiate the various eccentric training methods used in research and practice. This review proposes a new conceptual framework that clearly outlines the different forms of eccentric motions that fall into a desired eccentric training method.

This article is the first of a continuing series on practical, evidence-based approaches to reducing the risk of injury while developing tactical strength and conditioning. The focus of this article is on how to reduce non-contact ACL rupture injuries from turf and artificial fields.

It is apparent that speed plays a vital role in successful baseball performance. Because of the short distances involved in the game, players rarely, if ever, achieve maximum speed and in actuality, it is acceleration that plays a much greater role in baseball.