A major goal of the Foundation is to maximize assets to increase grants and scholarships for NSCA members. Donations come from contributors and selected sponsors who are also dedicated to science and research. With the growth of the Foundation, the NSCA has the ability to give back to its membership, affirming its mission of being the worldwide authority on strength and conditioning, supporting and disseminating research-based knowledge and its practical application to improve athletic performance and fitness.

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.

Learn how to prep for your NSCA-CPT® exam. Explore study timelines, optional NSCA Exam Prep resources, and community support through our clinics and Prep Group.

Advance the strength and conditioning profession while earning CEUs when you share your knowledge by getting published.

This continuing education opportunity explores a variety of topics as they pertain to sport psychology and coaching. To earn your CEUs, it will be necessary to review several articles and pass a 50-question quiz. Please note: this quiz awards 1.0 CEU (10 contact hours).