The purpose of this article is to provide an introduction to contrast training, including how it is defined, what variables are utilized, and examples of how to use it in training.

Paul Comfort, program leader for the Master’s degree in Strength and Conditioning at the University of Salford, talks to the NSCA Coaching Program Manager, Eric McMahon, about his desire to continuously learn through practical application and research in the field. Topics under discussion include creating the post graduate program for the University of Salford, being a founding member of the United Kingdom Strength and Conditioning Association (UKSCA), and the complexities of technology in the weight room. Find Paul on Twitter: @PaulComfort1975 or Instagram: @PaulComfort1975 | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

This article briefly explains the two principles necessary for muscle growth.

Beyond the programming, exercise technique, and human physiology, it is also important to create a customized system for sales success. Re-framing the purpose of the sales presentation in the proper light and creating a customized system that will allow a fitness professional to sell their services with integrity can allow them to help more clients.

This article presents information about assessing speed and agility in a controlled environment with a test that is similar to the actual demands of a specific sport.

This Personal Trainers Quarterly article presents protein dosing strategies to maximize wellness for the aging population. Visit NSCA online to read more on nutrition, health, and wellness.

Squash demands speed, strength, and control at the edge of human range — but still suffers from a massive stigma around heavy lifting and underuse of strength and conditioning. Brigita Roemer is leading the shift as Director of Strength and Conditioning for U.S. Squash, where she oversees all off-court physical development. After suffering a devastating injury as a track and field athlete, she discovered strength and conditioning when a biomechanics team “put [her] back together,” setting her on a linear path in the profession. Assigned to a sport she had never heard of before, Roemer began by emphasizing injury risk reduction, full range of motion, and “strength at length” to meet squash’s extreme movement and deceleration demands. With frequent connective tissue injuries like sprains and strains, athlete availability remains a top concern. By prioritizing continuing education and building relationships, Roemer has helped U.S. Squash make history — on the path to LA 2028. Connect with Brigita on Instagram: @brigey_lux | Find Eric on Instagram: @ericmcmahoncscs and LinkedIn: @ericmcmahoncscs Elite strength and conditioning pros like Brigita Roemer rely on NSCA events to stay sharp, grounded, and connected. Join them at the 2025 NSCA National Conference (NSCACon) this July 16–19 in Kansas City, MO.

Learn about the emerging field of biomechanics in professional baseball from Georgia Giblin, the Director of Performance Science for the Detroit Tigers Major League Baseball (MLB) team. Giblin shares her professional journey with NSCA Coaching and Sport Science Program Manager, Eric McMahon, from working with Olympic athletes in Australia to educating coaches on emerging technology tools within MLB. This episode features discussion on the recent growth of athletic performance departments, the current state of sport science in the United States, and the helpful role of strength and conditioning coaches in supporting sport science initiatives. Connect with Georgia on Twitter: @GeorgiaGiblin| Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

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.

This NSCA Coach article discusses training modalities in bench press training and incorporating accessories to improve rate of force development (RFD) among athletes. Visit NSCA online to read more on strength training and exercise science.