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

While a basic fitness assessment will always be a part of a comprehensive client assessment, there is an array of more sophisticated tests and measures that are available to the personal trainer today.

Tom Williams’ journey to Head of Performance and Sport Science for Major League Soccer (MLS) powerhouse, the Los Angeles (LA) Galaxy, began at a crossroads: pursue traditional coaching or medical pathways. As a soccer “Swiss Army knife,” he embraced early sport science alongside coaching, building a career defined by collaboration and innovation. At the Galaxy, Williams is part of a web of support that uses rich data storytelling tailored to stakeholders and players, guiding decisions and infusing value in every encounter. This system drives their three key pillars: winning championships — including their recent record-breaking sixth MLS Cup — developing a robust academy pipeline, and leading innovation. In MLS’s “cultural melting pot,” Williams balances diverse backgrounds and short-term demands like fixture congestion while employing sustainable long-term strategies. With a unique full-time cognitive department and creative approaches like dodgeball warm-ups, he combines trust and ingenuity to elevate performance and presents a blueprint for those exploring emerging sport science. Reach out to Tom on LinkedIn: @tom-williams and X/Twitter: @Williams26Tom | Find Eric on Instagram: @ericmcmahoncscs and LinkedIn: @ericmcmahoncscs Did you know MLS has a newly mandated Certified Performance and Sport Scientist® (CPSS®) role? Engage with NSCA’s Pro Sport Partner, the Professional Soccer Performance Association (PSPA), on social media to learn more: Instagram: @pspa_performance X/Twitter: @PSPA_perform LinkedIn: @professional-soccer-performance-association

Each NSCA SIG has an executive council composed of a chair and at least two members. Applications are accepted from October 1 to December or January 15 annually. Check back during the application window for information on open positions.

Are you interested in pursuing a career in strength and conditioning research? Chad Kerksick, Assistant Professor of Exercise Science at the University of New Mexico, provides insight into some of the advantages and disadvantages of a career in academia. Kerksick talks about how to choose a path, and the different types of academic jobs available today.

This article presents information about assessing speed and agility in a controlled environment with a test that is similar to the actual demands of a specific sport.

This article features the recharge skate—an in-season hockey conditioning drill, designed by the authors, to maintain hockey-specific energy system fitness throughout the competitive season.

In the push for personal training sales, many gyms will use assessment protocols as a way to prove to clients that they can indeed benefit from personal training. This article examines the merits behind this concept.

National Strength and Conditioning Association (NSCA) Fellows are an accomplished group of professionals whose frequent and sustained contributions to the profession have promoted the goals and activities of the NSCA. The purpose of the Fellowship is to promote excellence and leadership within the NSCA by recognizing high standards and extraordinary professional development.

Official Rules for the 2026 NSCA Experience Day Giveaway