This excerpt from Developing the Core briefly defines closed- and open-chain exercises and their respective roles in training.

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 from Developing Speed discusses the various start patterns that exist and how to include them in a speed development program.

For emerging athletes to move properly and develop athletic skills, they must first develop proficiency in fundamental motor skills. The ABCs of athleticism, therefore, must reflect the development of fundamental motor skills first, and specific athletic skills second.

This video demonstrates coaching cues that can help an athlete to utilize optimal squat technique. It specifically addresses stance width, heel position, head position, and squat depth

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.

The purpose of this article is to examine which foot placement (staggered or parallel) provides better trunk stability when performing the barbell biceps curl exercise.

This article provides essential guidelines for athletes beginning a strength and conditioning program that ensures safety and productivity of the training sessions.

High knee drills help develop coordinated front-side mechanics and are often used as part of a warm-up. This article details several high knee drills that you can use with your athletes.

The squat is one of the most widely used exercises in resistance training programs. The aim of this narrative review was to analyze the effect of the squat on lower-limb muscle hypertrophy. Briefly, the available literature indicates that the squat is an effective exercise for inducing hypertrophy of the quadriceps, mainly the vastii, but also the rectus femoris, although to a reduced magnitude. Multiple lines of evidence suggest little to no hamstring hypertrophy from the back squat. Although the gluteus maximus clearly participates mechanically in the back squat, few longitudinal studies exist on the topic. The limited evidence available on this topic suggests deeper squats may be more hypertrophic for the gluteus maximus, and that, squat depth beyond 908 of knee flexion may not provide further hypertrophy of the knee extensors. Despite the popularity of the many squat variations, there are still controversies surrounding their hypertrophic potential for lower-limb musculature. Further studies are needed to investigate the hypertrophic effects of different squat variations, as well as differences in hypertrophy because of squat depth, stance, barbell position, and different squat apparatuses/machines.