NSCA Coach provides valuable takeaways for every level of strength and conditioning coach through quarterly, electronic issues. You can find scientifically based articles specific to a wide variety of your athletes’ needs with Nutrition, Programming, and Youth columns.

This article is part of a continuing series of tactical strength and conditioning (TSAC) research reviews. It is designed to bring awareness to new research findings of relevance to tactical strength and conditioning communities.

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

Gain a thorough understanding of thoracic spine anatomy, the causes and effects of limited thoracic mobility, and the diverse strategies that may enhance thoracic mobility from the Arizona Diamondbacks Major League Baseball (MLB) Strength and Conditioning Team.

The purpose of this article was to conduct a process evaluation of a six-week recruit strength and conditioning programming for rural structural firefighter recruits.

This article explains the connections between the upper and lower body and their influence on performance and recovery strategies in sprinting.

This purpose of this article is to supply personal trainers with resistance training techniques, progressions, and cues that can assist their clients in overcoming sarcopenia and to eventually press to the overhead position pain free and with confidence.

This article is the sixth in a continuing series of tactical strength and conditioning (TSAC) research reviews. It is designed to bring awareness to new research findings of relevance to tactical strength and conditioning communities.

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.