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.

Colorado Springs, CO – Strength and conditioning coaches from across the nation will converge at the NSCA’s Coaches Conference on January 4, 2018 in Charlotte, NC to discover cutting-edge research and practical applications in strength and conditioning, presented by the industry’s most elite and respected experts.

This article is the first of a continuing series on practical, evidence-based approaches to reducing the risk of injury while developing tactical strength and conditioning. The focus of this article is on how to reduce non-contact ACL rupture injuries from turf and artificial fields.

This article from the TSAC Report shares dietary guidance, customized exercise programs, and strategies for integrating whole health for veterans. Visit NSCA online to learn more about exercise science.

Bo Sandoval, Director of Strength and Conditioning for the UFC Performance Institute, walks through weightlifting examples used to elicit changes in the force-velocity curve.

Congratulations to the 2021 NSCA Award Winners!