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.

Exercise and physical activity are necessary for the development of optimal bone health, as well as the preservation of bone mass density (BMD) throughout life. It is imperative, as health and fitness professionals, to understand the impact of exercise on skeletal health and overall wellness and to serve as an educational resource for clients.

In this session from the 2016 NSCA Coaches Conference, the Sports Science and Performance Manager for the Seattle Sounders Major League Soccer (MLS) team, David Tenney, discusses the “high performance model” in the American elite sports environment. Tenney delves into how this model impacts hierarchy and daily decision making, as well as the obstructions that many organizations face, how this model can help to drive decision making and optimize training strategies, and the different strategies that can help make this happen.

Fitness testing uses a battery of protocols recognized by the scientific community as both reliable and valid, and it measures important fitness constructs such as aerobic endurance, muscular strength, muscular endurance, power, agility, flexibility, and balance.

This Personal Trainers Quarterly article examines a client's ability to maintain pelvic and trunk stability during a dynamic fitness screening. Visit NSCA online to read more on corrective exercises, health, and fitness.

This article discusses the idea of Confucian adaptability as a framework for cultivating interpersonal skills for personal trainers.

This article in PTQ 11.4 shares the latest fitness news to provide personal trainers with strategies for perimenopausal clients. Visit NSCA online to read articles on exercise science and fitness.

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

This article provides a narrative of the effects of a five-week strength and conditioning program on collegiate female volleyball athletes and shows the potential benefits that may occur in lower-body performance.

Unlocking Rotational Power