This article aims to share practical application strategies that strength and conditioning coaches can use in fostering a positive change in their athlete’s performance by understanding intrinsic and extrinsic performance motivation and how to adopt an autonomy-supportive coaching style.

Although fatigue is commonly experienced in many highly demanding occupations (e.g., military, first responders, etc.), it is poorly defined. Fatigue can strongly affect occupational performance by negatively influencing the ability to interact with the world by altering the capacity to think, move, feel, see, and speak. The first step in fatigue risk management strategies is to establish a context. The context of this narrative review is to specifically describe and discuss the 6 overarching types of occupational fatigue: cognitive, physical, burnout, emotional, visual, and vocal fatigue, and how each affects varying occupations. Furthermore, fatigue type can be influenced by several intrinsic factors, such as sleep deprivation, circadian alignment, ultradian process, sleep homeostasis, and health factors. Similarly, extrinsic factors influence fatigue, such as workload, shift work, and environmental issues. Understanding the types and contributors to occupational fatigue may help clarify the context of occupational fatigue and serve to guide future occupational fatigue management.

This article briefly describes how individuals can have the same training program, but have large fluctuations in the adaptation responses due to genetic and life style factors.

The physiological response to breath holding includes bradycardia and peripheral vasoconstriction, which contrasts with that of exercise which includes tachycardia and peripheral vasodilation. This raises the question as to what the physiological response is to breath holding during exercise. During low-intensity exercise, the breath holding response of bradycardia and peripheral vasoconstriction prevails over the exercise response of tachycardia and peripheral vasodilation, but nevertheless the exercise may be sustained. Due to the lack of availability of extrinsic oxygen (O 2 ) from the atmosphere during breath holding, the energy demands can be met by increased reliance on intrinsic O 2 stores (i.e., O 2 that was in the body before the breath hold) via increased O 2 extraction at the muscle compared with exercise while breathing, or increased contributions from anaerobic energy systems. During high intensity exercise of short duration, the exercise response may prevail over the breath holding response due to the increased parasympathetic withdrawal and sympathetic drive of higher intensity exercise. If breath holding during high-intensity exercise was sustained for long enough, the breath holding response may eventually overcome the exercise response, although this may be difficult due to the inverse relationship between exercise intensity and breath hold duration.

This article is the fourth of a continuing series that examines pertinent and recent tactical strength and conditioning research reviews.

This book excerpt reviews the psychological principal of the self-determination theory (SDT) and its role in motivation and how this can be used in a tactical setting.

The aim of this article is to highlight the functional importance of the foot, and to provide recommendations for foot conditioning.

This article aims to help personal trainers understand the unique symptoms accompanying multiple sclerosis, how exercise recommendations change based on disease progression, and which techniques to best program for your client.

This article discusses motivation, self-efficacy, and barriers to exercise specific to law enforcement officers. Visit NSCA online to learn more about tactical performance and occupational fitness.

This article explores the process and reasoning behind integrating an athletic trainer within a fire department to provide clinical care and injury prevention protocols.