Considering the great popularity of eccentric-based training, the purpose of this review is to first provide the scientific rationale for its use; second, summarize the eccentric-based training modalities that can be used; and finally, offer practical recommendations on how to implement eccentricbased modalities to enhance sports performance. The molecular and neural mechanisms underlying eccentric actions are partially distinct from those of concentric and isometric actions. During eccentric actions, theories suggest a strain-induced modulation of actin-myosin interactions at the crossbridge level, activation of structural protein titin, and winding of titin on actin. Eccentric acute physiological responses differ from concentric exercise responses, including variations in neuromuscular, metabolic, hormonal, and anabolic signaling. Eccentric training elicits greater improvements in muscle strength, power, and stretch-shortening cycle function compared with concentric-only or traditional resistance training. Therefore, eccentric-based training can lead to unique neuromuscular (e.g., improved coordination of motor units) and morphological (e.g., increased muscle fascicle length and enhanced distal cross-sectional area) adaptations that could play a key role in sport performance. Practitioners may implement eccentric exercises with external loads, fully eccentric-based exercises (e.g., Nordic hamstring curl), accentuated eccentric loading, flywheel resistance exercise, and plyometrics to develop specific physical adaptations in line with their goals. Eccentric work (e.g., for hamstrings) can be obtained during other exercises such as downhill running tasks, decelerations, and sprinting activities. Practitioners need to be aware that no single “silver bullet” training modality exists; consequently, practitioners should use a combination of eccentric-based training approaches with their athletes to obtain the desired adaptations.

Every three years, we conduct an audit of NSCA certified individuals who have completed the recertification process. We require each randomly selected certificant to share documentation that shows proof of compliance with recertification requirements.

On April 24, 2014, the National Collegiate Athletic Association (NCAA) adopted a standard of certification for Division I strength and conditioning coaches. The article provides information and answers to frequently asked questions about the standard.

The NSCA is a nonprofit association dedicated to advancing strength, conditioning, & related sport science professions.

The National Strength and Conditioning Association (NSCA) is proud to announce the winners of the organization’s 2022 Tactical Awards. The NSCA is honored to announce Joseph R. Kelleher, CSCS, TSAC-F has been selected as the 2022 Tactical Strength and Conditioning Coach of the Year. The NSCA is equally honored to announce Robin Orr, PhD, TSAC-F,*D, has been selected as the Tactical Strength and Conditioning Professional of the Year.

This is the NSCA’s Coaching Podcast, where strength and conditioning coaches share their experience, lessons learned, and advice about how to thrive in a highly competitive profession.

The College Strength and Conditioning Coach of the Year Award is given to an outstanding Certified Strength and Conditioning Specialist® (CSCS) to recognize their dedication to improving athletic performance with safe and effective science-based programs.