Periodization of training is based on the principle that different loads (e.g., light, moderate, or heavy) or power requirements recruit different types and numbers of motor units. Recruitment order is important from a practical standpoint for several reasons.

The U.S. Department of Health and Human Services (HHS) recently recognized the National Strength and Conditioning Association (NSCA) as one of the first organizations to join the National Youth Sports Strategy (NYSS) Champion℠ program. HHS released the NYSS in September 2019 in response to Presidential Executive Order 13824, which called for a national strategy to increase youth sports participation. The NYSS is the first Federal roadmap with actionable strategies to increase participation in youth sports, increase awareness of the benefits of youth sports participation, monitor and evaluate youth sports participation, and recruit and engage volunteers in youth sports programming.

The purpose of this article is to propose a training model for the aging firefighter to improve the athletic qualities of aerobic fitness and muscular strength so that they may remain healthier longer into their careers.

The path to actual integration of mental and physical training for the tactical athlete is paved with growing empiricism. The current challenge is to sustain creative development of functional approaches and demonstrate that integration can deliver potential benefits.

Although most resources on program design review the foundational scientific principles of training, they often fail to provide practical strategies that strength and conditioning professionals need in order to apply these principles successfully. To help bridge the gap between science and application, this article provides a simple and practical, step-by-step system for applying the scientific principles of training into the program design process.

Osteoporosis and low bone mineral density (BMD) are conditions that affect millions of people, and the amount of people afflicted is on the rise. To potentially reverse this trend, personal trainers can provide group sessions of high-intensity progressive resistance training to increase BMD and prevent osteoporosis.

This article will examine the physical demands of soccer players and discuss why repeated sprint ability (RSA) is considered highly important in the performance of these athletes.

The purpose of this article is to identify and discuss the difficulties that can arise when performing physiological-based research with firefighters.

This article highlights the scientific evidence on exercises like the seated leg extension, leg curl, and adduction machines to highlight their potential benefits on enhanced performance and potentially reducing injury risk.