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.

This article briefly examines the most popular instability training devices and provides examples of how instability training can be incorporated into traditional resistance training programs.

Chris Frankel, Head of Human Performance for TRX Training, spoke at the NSCA's 2013 TSAC Conference on training tactical athletes with limited resources and space. In this hands-on presentation, Chris performs exercises using the TRX Suspension Training System.

This article provides a brief overview of literature where regional hypertrophy was reported. It also discusses the basic science and application of regional hypertrophy training.

Speed and Agility Training

Scientific Principles of Training

Joe Kenn, MA, CSCS,*D, RSCC, spoke at the NSCA's National Conference about training and the impact of training in a fatigued state.

Chris Morris, Director or Performance Science at the University of Kentucky, talks to the NSCA Coaching Program Manager, Eric McMahon, about the importance of capturing athlete readiness through data and technology. Topics under discussion include Dr. Morris’s time as a University of Kentucky football player turned PhD student, how sports science is critical to understanding athlete’s capacities on a much deeper view, and developing interpersonal relationships with athletes to create trust and buy-in. Find Dr. Morris on Twitter: @CMorrisPhD | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

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 excerpt from NSCA’s Essentials of Sport Science highlights the importance of quantifying training load for both programming and monitoring an athlete’s progression or regression over time.