Oxygen uptake (or consumption) is a measure of a person’s ability to take in oxygen and deliver it to the working tissues, and the ability of working tissues to use oxygen. During low-intensity exercise with a constant power output, oxygen uptake increases for the first few minutes until a steady state of uptake is reached.

Knowledge of metabolic rate can help athletes as well as health-conscious people improve their exercise performance or obtain the fat-to-lean-mass ratio optimal for their personal situations. Two examples of how this works follow.

Athletes in field and court sports require reactive agility—they must accelerate, decelerate, and change direction in a constantly changing environment. These requirements result in technical differences between sprinting in a field or court sport and sprinting the 100-m.

Research shows that the appropriate integration of resistance training into the endurance athlete’s training can result in significantly better performance when compared to classic endurance training plans that focus only on aerobic endurance.

Coaches can also benefit from understanding the concepts of positive and negative reinforcement and positive and negative punishment as they relate to motivation. Although coaches use a mixture of both reward and punishment, using rewards and a positive approach is arguably the best approach because it focuses on what athletes should do and what they did right.

The periodization of training is facilitated by a hierarchical structure that allows for several distinct interrelated levels that can be used in the planning process. Each level of the periodization process should be based on the training goals established for the athlete or team.

Scenarios that provide a stimulus relevant to the sporting environment may help athletes develop better anticipation skills through the refinement of search strategies, response speed and accuracy, pattern recognition, and decision-making abilities.

Flexibility training is important because of the role that flexibility plays in improving movement performance and reducing the opportunity for injury. Learn more about the role of flexibility training in this exclusive excerpt from the book NSCA's Essentials of Personal Training, Second Edition, published by Human Kinetics.

The top concern of strength coaches should always be athlete safety. For this reason, the NSCA has compiled a list of resources to raise the standard of care when working as a strength coach at any level. By reading and sharing these examples of standards and guidelines, policies and procedures, position statements on vital topics, mental health best practices, and more, strength coaches can push to increase the safety of athletes around the world.

[High School Athletic Directors] Help your coaches gain the skills they need to safely and confidently teach complex lifts to student-athletes with this 1-day course. Skilled coaches are a key to a safe weight room, happy parents, and improved sports performance.