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.

Here are more reasons why award-winning Certified Strength and Conditioning Coach Scott Sahli is happy when kids are involved in multiple sports programs and supervised by certified strength coaches.

Give your athletes that competitive edge with the 2021 Professional Baseball Strength & Conditioning Coaches Society’s (PBSCCS) Virtual Clinic powered by the NSCA. Identify strength training, conditioning and wellness best practices for the baseball player.

The NSCA Education Recognition Program (ERP) recognizes regionally accredited academic institutions for their educational programs that have met, and continue to meet, educational guidelines recommended by the NSCA. ERP recognitions are good for three years and schools are eligible for renewal following this three-year period.

Answers to 7 common questions about CASCE accreditation and resources to clarify and streamline the process.

Personal Training Quarterly is digitally published four times a year. Look for articles and information on how you can expand your personal training career through integrating training methods and accessing tools for building your business. You must be a member of the NSCA to access the PTQ.

Join the 2026 NSCA Personal Trainers Virtual Conference (PTCon) online October 27–30 for flexible continuing education, evidence-based strategies, and 2.0 CEUs.