The catecholamines—primarily epinephrine, but also norepinephrine and dopamine—are secreted by the adrenal medulla and are important for the acute expression of strength and power because the hormones act as central motor stimulators and peripheral vascular dilators to enhance enzyme systems and calcium release in muscle.

Oxygen uptake (or consumption) is a measure of a person’s ability to take in oxygen and deliver it to the working tissues, and the ability of working tissues to use oxygen. During low-intensity exercise with a constant power output, oxygen uptake increases for the first few minutes until a steady state of uptake is reached.

Coaches can also benefit from understanding the concepts of positive and negative reinforcement and positive and negative punishment as they relate to motivation. Although coaches use a mixture of both reward and punishment, using rewards and a positive approach is arguably the best approach because it focuses on what athletes should do and what they did right.

Flexibility training is important because of the role that flexibility plays in improving movement performance and reducing the opportunity for injury. Learn more about the role of flexibility training in this exclusive excerpt from the book NSCA's Essentials of Personal Training, Second Edition, published by Human Kinetics.

As the final article of the three-part series on long-term athletic development (LTAD), this article will focus on enhancing physical fitness and participation in LTAD programs that promote physical fitness and physiological wellbeing, regardless of age, ability, and aspirations.

This article explores a return to duty program for the tactical facilitator to implement with injured firefighters.

The NSCA Foundation (NSCAF) awards hundreds of thousands in research grant dollars each year to outstanding individuals within the strength and conditioning community. The NSCAF is one of the few foundations that fund research for master’s degree students and across all levels of education and experience up to senior investigators, as well as one of the few sources that funds work in the strength and conditioning field

We are excited about your interest in CASCE accreditation. Your application is the first step in the accreditation process.

Rugby strength and conditioning coach Ashley Jones talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about early involvement in the NSCA, working in professional sports, why it is important to write as a strength and conditioning coach, building your network, and avoiding burnout.

This excerpt from Developing Agility and Quickness provides a needs analysis for field hockey and possible program design options for optimal performance outcomes.