Ground-based free weight lifts, especially the explosive Olympic-style lifts, are highly recommended for athletic conditioning for the core muscles. They can provide a moderately unstable stimulus to augment activation of the core and limb muscles, while still providing maximal or near maximal strength, velocity, and power output.

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.

The purpose of this article is to discuss relationships between current fitness testing within the United States Army and its effect on overall tactical readiness.

If you want to manage the performance of assets worth hundreds of millions of dollars, you better know what you’re doing. At the elite and professional levels of sport, strength and conditioning coaches are responsible for managing the performance of teams’ most valuable assets – The Athletes.

Congratulations to the NSCA's 2025 awardees for their dedication and contributions to the NSCA and the field of strength and conditioning.

This article compares an equipment-heavy Army Combat Fitness Test to a minimal-equipment training program and test.

Christina Rasnake, Director of Sport Science and Analytics at the University of Delaware, talks to the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about the budding future of sport science in college athletics. Topics under discussion include the staffing of sport science initiatives, effective communication across departments, and how technology and wellness surveys can support actionable change in the coaching process. Find Christina on Twitter: @Coach_Raz26 | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs