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 VO2max test is the most effective measurement of the body’s ability to deliver and use oxygen for producing energy that can be used by the muscles. VO2max (i.e., maximum aerobic power) simply stands for the maximal volume of oxygen that can be used.

The steps on this page will help you select the right certification that fits your career goals.

This column reviews recent literature that investigated the appropriateness of a commonly utilized on-duty exercise training modality for firefighters and describes the occupational demands of specialist tactical police officers.

This article discusses the variability in physical testing outcomes for law enforcement recruits based on the ambient temperatures and relative humidity present on test day.

Learn about the framework for practical, functional, and sequential skill development for a “best practices” model. This model is designed to develop a movement vocabulary, physical literacy, and movement skills for improved athleticism.

This article serves to educate people about the menstrual cycle in the tactical female population. It provides a framework for how to work through the phases of menstruation to increase training response, and thus, overall success in military training.

This article provides considerations for preparing firefighters for the physical and psychological demands of their job, including pre-operational work specific training during their rest times.

Tex McQuilkin, Director of Training and Education at Power Athlete talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about Coach McQuilkin’s work at power athlete, his athletic background, and his start into Strength and Conditioning. Topics under discussion include: Power Athletes education program, Coach McQuilkin’s experiences working with athletes, his GA position,

This Kinetic Select from Developing the Core reviews the effects of muscle activity when performing exercises on unstable surfaces.