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 provide warfighters and tactical facilitators with an evidence-based approach to improve maximal strength and power using the trap bar deadlift as it relates to combat preparedness.

Older adults who desire to remain physically active at work, recreation, or sport can improve muscular strength, physical performance, and injury prevention if engaged in a properly designed resistance exercise program. The programming considerations presented herein may serve as a useful reference for strength and conditioning professionals working closely with active older adults.

In this session from the NSCA’s 2017 Coaches Conference, Tara De Leon presents common issues that female athletes face and provides solutions for how to optimize training in females. CEUs available.

Matt Berenc, Director of Education for Equinox, discusses key points to consider when adding kettlebells into a personal training program

The goal of this article is to define some of the basic physiological responses to acute and chronic altitude exposure and to provide some evidence-based, practical guidelines when approaching training and racing at higher altitudes.

The purpose of this article is to provide personal trainers an overview of training clients for their first Spartan Sprint event.

Brad Schoenfeld, MS, CSCS, CSPS, NSCA-CPT, spoke at the NSCA's 2012 National Conference on the primary principle of metabolic resistance training.

Matt Berenc, Director of Education for Equinox, discusses key points to consider when adding kettlebells into a personal training program

This book excerpt from Developing Endurance goes over nutritional strategies for pre-competition and during competition phases to maximize performance.