Long-Term Athletic Development (LTAD) models have provided a youth sport framework for more than 2 decades, aimed at improving skill progression, training outcomes, and athlete preparation. Although influential, traditional LTAD approaches are limited by their sport-centric orientation, linear design, and focus on elite performance, leaving them less relevant for most youth and adults who do not pursue competitive sport. In response, we propose reframing LTAD as Long-Term Activity Development (LTActD), an accessible and flexible model designed to promote lifelong engagement in physical activity, including recreation, exercise, and sport. LTActD emphasizes 5 dynamic phases—Explore, Develop, Apply, Sustain, and Thrive—that accommodate diverse pathways, periods of inactivity, and opportunities to re-enter active living at any age. Represented as a curvy road, the new model underscores that participation in physical activity is rarely linear, more like a winding journey shaped by health, motivation, environment, and social context. LTActD bridges sport science and public health, positioning physical activity as a lifelong resource for health, independence, and fulfillment. LTActD offers a practical framework to empower individuals of all ages and abilities to discover meaningful ways to move, re-engage, and embrace active living throughout the life course.

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The focus of this article is to describe the physiological needs of soccer athletes and then provide assessments for testing endurance of athletes of various ages, abilities, and genders.

Explore the applied sport science research process in college baseball, and how academic research can be optimized to benefit player programming. This episode features Dr. David Szymanski, the Director of Baseball Performance at Louisiana Tech University, and co-editor of the recently published book NSCA’s Strength Training for Baseball. Hear about Szymanski’s career path, from college baseball player to coach and sport scientist. This episode covers a wide range of relevant topics, including exercise selection, performance technology, student pathways, and the emergence of performance director roles across Major League Baseball (MLB). Find David on Instagram: @drdavidszymanski or at his program website: LA Tech Sport Science| Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

This article explores the concept of how lifestyle behaviors encouraged at the high school-level could affect fitness during adulthood, with a focus on both sport and strength and conditioning participation.

When collegiate athletes are also cadets, coaching requires adaptability and flexibility at its finest. In this Gatorade Performance Partner Special Episode, Scott Caulfield shares his coaching philosophy as the first Director of Strength and Conditioning at Norwich University, a senior military college. Coach Caulfield oversees 23 varsity teams and over 600 student-athletes — including Corps of Cadets members and civilians — while also serving as a campuswide resource and adjunct instructor. With field training taking precedence, he describes adapting to varying student needs, goals, and readiness levels. As a veteran and Vermont native, he reflects on returning home and the higher service component of preparing students for careers beyond sport. Coach Caulfield also brings his certified therapy dogs into the weight room, creating an “immediate barrier breakdown” that helps students feel at ease. He calls on coaches to get involved, take advantage of NSCA Foundation opportunities, and keep pushing the profession forward. Reach out to Coach Caulfield on Instagram at: @coachcaulfield, and see his weight room therapy dogs at: @atm_riv_g_therapydogs. Explore the latest from the Norwich weight room at: @norwichsc | Email Jon at: jonathan.jost@pepsico.com | Find Eric on Instagram: @ericmcmahoncscs or LinkedIn: @ericmcmahoncscs. Explore scholarships, grants, and assistantships at NSCA.com/Foundation. Apply for volunteer leadership opportunities by December 15 at NSCA.com/Volunteer. Read the free TSAC Report article on coaching philosophy to enhance communication between strength and conditioning professionals and firefighters, co-authored by Scott Caulfield. This special episode is brought to you in part by Gatorade Performance Partner. Learn more and join their community at GatoradePerformancePartner.com.

This article explores biomechanics through the lens of a fulcrum and lever system, providing personal trainers with strategies to reduce injury risk and improve performance. Visit NSCA online to learn more about personal training and program strategies for fitness.

This article discusses how first responder organizations can optimize their training programs through scientific techniques, including the measurement of training load.

Consumption of dietary protein by athletes is a common intervention to maximize gains in muscle and strength, and to improve body composition. The purpose of this article is to analyze the current research on the optimal amount of dietary protein for resistance training athletes.

Elite sport often gets more attention, but youth training gives strength and conditioning coaches an earlier chance to build athletes’ competence and confidence. Kelli Brightwell specializes in youth development and brings more than a decade of sports training experience, including four years at Michael Johnson Performance. Brightwell defines peak height velocity as the period during which height increases fastest. She then explains why its timing can differ among teammates of the same age. So what should strength coaches test, and what do the results mean? The answer changes with each athlete’s maturity and training experience. Brightwell addresses the growth-spurt “awkward phase,” when familiar movement patterns can break down as an athlete adjusts to a changing body. She also considers how sport sampling can expand children’s range of physical skills and help them discover what they enjoy. Learn how maturation can affect movement, testing, and programming — and why young athletes need foundations before specialization.