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.

This NSCA Coach article examines strength and conditioning strategies for collegiate distance runners to build performance for outdoor competition. Visit NSCA online to read about sport science.

This NSCA Coach article discusses training modalities in bench press training and incorporating accessories to improve rate of force development (RFD) among athletes. Visit NSCA online to read more on strength training and exercise science.

Dietmar Schmidtbleicher, Head and Chair for Sport Sciences at the Institute of Sport Sciences at the Goethe University Frankfurt/Main in Frankfurt, Germany—and one of the world’s leading experts on strength and power training—explains the influencing factors of force production in eccentric muscle actions. Schmidtbleicher made a rare appearance in the United States at the NSCA’s 2015 National Conference.

This video demonstrates techniques used for the four primary components of deceleration: dynamic balance, eccentric strength, power, and reactive strength.

This article examines why the Romanian deadlift (RDL) provides a suitable in-season strength training application, explores the interlinked relationship between the demands of practice and resistance training, and identifies how the RDL functions with other lower-extremity exercises.

Matthew Ibrahim, Co-Owner of TD Athletes Edge, talks to the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about using setbacks as a learning opportunity. Topics under discussion include creating a holistic approach to a client’s training by collaborating with other professionals, and the importance of deceleration technique and eccentrics in his programs for skill acquisition. Find Matthew on Instagram: @matthewibrahim_ | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

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.

NSCA Coach 11.4 shares how strength training of the posterior chain in athletes can reduce injury risk and aid rehabilitation. Visit us online to read more about exercise research.

Hear from strength and conditioning coach, Tim Caron, on his path from collegiate strength and conditioning into a unique private sector business model in the Los Angeles, CA area. Caron connects with NSCA Coaching and Sport Science Program Manager, Eric McMahon, to discuss the potential role of sport science in the private sector with general population clients. This episode is full of training insights for coaches to re-engage their thought process around working with groups and teams. In addition, Caron shares the origins of his new book, Strength Deficit, on considerations for concentric and eccentric strength training. You can reach Tim on Instagram at @coachtimcaron or Twitter at @coachtimcaron | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs