This is an excerpt from NSCA's Essentials of Sport Science by NSCA -National Strength & Conditioning Association, Duncan N. French & Lorena Torres-Ronda.

Athletes in field and court sports require reactive agility—they must accelerate, decelerate, and change direction in a constantly changing environment. These requirements result in technical differences between sprinting in a field or court sport and sprinting the 100-m.

Regarded as a sport science advocate in Major League Soccer (MLS), follow David Tenney’s journey from sport coach to High Performance Director at Austin Football Club (FC). Tenney and NSCA Coaching and Sport Science Program Manager Eric McMahon begin by discussing increases in MLS staff and embracing the overlap between coaching and performance science staff. Tenney reflects on how experienced coaches often evolve toward mentorship, finding balance between “leader” and “practitioner.” The pair examine the new MLS-mandated performance scientist position, which requires the Certified Performance and Sport Scientist® (CPSS®) credential. Created to standardize the role and responsibilities, MLS performance scientists leverage data from GPS and force plates into effective and ethical takeaways. As President of the emerging Professional Soccer Performance Association (PSPA), Tenney shares his goals to create a network, gain representation, and increase credibility. Tenney and McMahon also explore the robust MLS developmental pipeline, interviewing strategy, and early career advice. Connect with David on Twitter/X: @davetenney or LinkedIn: @david-tenney | Find Eric on Instagram: @ericmcmahoncscs or LinkedIn: @ericmcmahoncscs For a deeper look into sport science, explore career trends and how to leverage the CPSS certification into new career opportunities. Discover your next job or internship on the NSCA Job Board. This episode discusses David Tenney’s PhD dissertation, An Exploration of the Leadership Competencies Required for High-Performance Directors in North American Professional Sports Organizations, which includes interviews with NFL, NBA, MLB, NHL, and MLS leaders.

The purpose of this article is to discuss the different opinions regarding the validity of early sport specialization as opposed to diversification, specifically the effect these two methods have on injuries, motor development, skill acquisition, and social and psychological aspects.

Ground-based free weight lifts, especially the explosive Olympic-style lifts, are highly recommended for athletic conditioning for the core muscles. They can provide a moderately unstable stimulus to augment activation of the core and limb muscles, while still providing maximal or near maximal strength, velocity, and power output.

Kurt Hester, Head of Sports Performance at Louisiana Tech University, talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about his journey from weight lifting at 12 years old to training collegiate football athletes today. Topics under discussion include starting a business, pioneering strength and conditioning, and the interview process. Find Kurt on Twitter: @thekurthester or on Instagram: @hesterkurt | Find Scott on Instagram: @coachcaulfield

This article takes a closer look at training strength and stiffness in connective tissues.

This Personal Training Quarterly article presents time-efficient fitness strategies to maintain physical and mental health during early parenthood. Visit NSCA online to read more on nutrition, health science, and fitness news.

Acceleration and maximum speed are terms used in speed development programs, and when developing a program, it is vital to differentiate between the two. This allows coaches to target their training to the capacity most important in their own sport.

This article looks to explain why law enforcement recruits have higher incidences of lower extremity bone stress responses and stress fractures. It also explores injury mitigation pathways to increase the graduation rates among law enforcement academies.