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.

Emergency Preparation Plans As a Personal Trainer

Sam Melendrez, full-time strength and conditioning coach for Discovery Canyon Campus High School, talks to the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about the value of strength and conditioning coaches at the high school level. Topics include advice for those who are interested in strength training youth and high school athletes, programming fundamentals, and the value of applying classroom management skills in the weight room. Find Sam on Twitter: @sammelendrez2 | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

Readership Survey Results

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

The daily energy requirements of tactical personnel are highly variable, depending on gender, body composition, activities performed, age, and environmental conditions.

The NSCA is proud to name new strength and conditioning coaches who have obtained the prestigious Registered Strength and Conditioning Coach® Emeritus (RSCC*E) designation in 2024.

Brice Long, Director of Human Performance Experience at O2X, talks to the NSCA Coaching Program Manager, Eric McMahon, about O2X’s holistic approach for fire, police, military, and federal agencies. Topics under discussion include the value of training as a firefighter, physical tests and assessments in the National Guard, and being diverse in your skill sets as a coach. Find Brice on Instagram: @o2xhumanperformance or Twitter: @o2xhp | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

Get to know the 2024 NSCA Assistant College Strength and Conditioning Coach of the Year, Kenna Smoak-Minnici. After accepting her award at the 2024 Coaches Conference, she connects with NSCA Coaching and Sport Science Program Manager, Eric McMahon, about the unique coaching rigors at the prestigious military academy, Army West Point. The episode goes beyond the demands of sport-specific training to developing student-athletes and leaders for sustained success in the military. Smoak-Minnici highlights the role of family along her journey as an athlete and strength and conditioning coach, as well as the importance of always pushing yourself to go beyond the norm. Connect with Kenna on Instagram at: @kenna_minnici or LinkedIn: @kenna-smoak-minnici | Find Eric on Instagram: @ericmcmahoncscs or LinkedIn: @ericmcmahoncscs Did you enjoy the episode? Don’t forget to nominate a deserving strength and conditioning coach for an NSCA Coach of the Year Award at NSCA Awards.

This article aims to explore why unloaded non-linear training can be an effective modality for personal trainers, strength coaches, and exercise enthusiasts, as well as present the benefits, possible implications, and methods that can be implemented into a current training program.