This Kinetic Select from Developing the Core reviews the effects of muscle activity when performing exercises on unstable surfaces.

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

This article explores the critical role of nutrient timing in optimizing energy levels, supporting recovery, and enhancing overall physiological responses.

Scenarios that provide a stimulus relevant to the sporting environment may help athletes develop better anticipation skills through the refinement of search strategies, response speed and accuracy, pattern recognition, and decision-making abilities.

This article describes proper technique for the one-arm dumbbell snatch, which is a total body power exercise.

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

Tactical athletes, due to the nature of their jobs, may have sleeping problems (such as falling asleep and/or staying asleep) which is indicative of poor sleep quality. This article shares sleep hygiene strategies that can help tactical athletes achieve better rest.

This article gives readers a personal insight into the qualities that a successful and credible personal trainer should have.

Read a step-by-step description of how to perform the two-arm kettlebell swing, in this exclusive excerpt from the book Exercise Technique Manual for Resistance Training-3rd Edition With Online Video, published by Human Kinetics.

This excerpt from Developing Agility and Quickness highlights the high-intensity, reactive agility hockey players require, and provides two agility drills that challenge that skill.