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.

Through this article, personal trainers should understand the extremes of the Wim Hof method, and instead encourage clients to follow scientifically-backed deep breathing and cold therapy practices to supplement a well-rounded exercise program.

Patrick McHenry, Head Strength and Conditioning Coach at Castle View High School in Castle Rock, CO, and member of the NSCA Board of Directors, talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about high school strength and conditioning and his growth in the NSCA from a volunteer to an NSCA Board mMember. Connect with Patrick on Twitter: @strengthcentral and Instagram: @ptmchenry | Find Scott on Instagram: @coachcaulfield and Twitter: @scottcaulfield

This article presents the shoulder taps, which could serve as a more time-efficient screening tool for tactical operators. Although this article will present the shoulder taps as an assessment modality, it may be expanded upon and prescribed as an exercise for the purpose of improving trunk, hip, and shoulder stability.

Bone tissue is “alive” and is a dynamic tissue that can respond to resistance training. In addition to the obvious effects of resistance training on muscle mass and strength, resistance training may lead to decreased risk for osteoporosis, fractures, and falls in later life.

NSCA Member Spotlight: Diane Homan shares her journey from club volleyball to coaching youth and professional athletes, built on NSCA credentials and community.

Understanding how the body adapts to the overload of aerobic exercise is critical to designing effective exercise training programs, monitoring exercise responses and progress, and assessing training outcomes.

This article from Developing Agility briefly discusses the importance of age-appropriate speed and agility drills.

This is an excerpt from NSCA's Essentials of Sport Science by NSCA -National Strength & Conditioning Association, Duncan N. French & Lorena Torres-Ronda.