Growth hormone release is affected by the type of resistance training protocol used, including the duration of rest periods. Short rest period types of workouts result in greater serum concentrations compared to long rest protocols of similar total work; however, at present it is not clear how the various molecular forms or types of growth hormones are affected by rest period duration.
John Hofman, CSCS, MS, spoke at the NSCA's 2013 TSAC Conference on preventing injury when providing firefighters with an in-house training program. In this hands-on presentation, John demonstrates exercises and prevention strategies.
May 30, 2025by Juan Gonzalez, PhD, CSCS, Jung-Il Oh, PhD, Sofia Alvarado-Valdez, Brianna Villarreal, Edgar De La Cruz, Daniela Barrera, and Nicole Trevino
The purpose of this article is to provide fitness professionals with best practices on creating a program that uses red light therapy to aid in weight loss and weight management.
Personal trainersExercise ScienceNutritionProgram design
The loading intensity a person chooses depends on his or her goals and training status (i.e., whether the person is a trained athlete or a sedentary individual). Ultimately, the number of repetitions you can perform at a given intensity or load determines the effects of training on strength develop.
Personal trainersTSAC FacilitatorsCoachesExercise TechniqueProgram design
This Kinetic Select from NSCA’s Essentials of Personal Training, Second Edition gives a brief overview of respiratory adaptations, and how aerobic interventions of duration and intensity can be used for specific adaptations for endurance training.
Personal trainersCoachesExercise ScienceProgram design
This Personal Training Quarterly article explores the science behind strength training’s effects on mental health and strategies for integrating wellness programming. Visit NSCA online to read more on fitness news and exercise research.
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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.
This study compared the effectiveness of the single-leg Roman chair hold exercise with the Nordic hamstring curl exercise in athletes with previous hamstring injuries.
Personal trainersTSAC FacilitatorsCoachesProgram design
This article includes examples of exercises that can be incorporated into a training program that is performed outdoors. Take advantage of warm weather with these suggestions.