The importance of recognizing a closed-chain activity lies in the fact that the motions of multiple joints are coupled. Weakness at any one joint will consequently limit performance of the entire movement.
Personal trainersCoachesExercise ScienceProgram designkinematic chainkinetic chainstrength and conditioning
The “five Ss” of trainability and performance are critical periods of development that all youth strength and conditioning coaches should consider when creating a training program. Coaches should take advantage of each window to maximize a youth athlete’s potential and help ensure a long athletic career.
CoachesProgram designLTADyouth training guidelinesyouth athletic training
Strength and conditioning coaches can help bridge the gap between research and anecdotal experiences by reporting subjective and objective information obtained while carrying out everyday responsibilities.
CoachesProgram designTraining program designcoaching technique
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
NSCA Member Spotlight: Diane Homan shares her journey from club volleyball to coaching youth and professional athletes, built on NSCA credentials and community.
Personal trainersCoachesOrganization and AdministrationProfessional Development
The extent to which a special operator’s training schedule can be planned in advance is often limited due to their unpredictable operational demands. However, there may be opportunities to plan for specific training during certain periods.
TSAC FacilitatorsExercise ScienceNutritionsports nutritionperiodizationtactical athletemilitary athlete;tactical strength and conditioningTSAC
In today's National Football League (NFL) world, teams are always on the lookout for the best talent. That is why strength and conditioning coaches are crucial in optimizing a prospect's value. This special episode of the NSCA Coaching Podcast features NFL Combine expert, Bryan McCall, sharing details of coaching process leading up to the event. The conversation includes co-hosts Eric McMahon, the NSCA Coaching Program Manager, and Gatorade Team Sports Manager, Jon Jost. You will hear Coach McCall credit Coach Jost as an early career mentor and emphasize the importance of mentorship for all coaches. Learn how to make a successful year-round business of strength and conditioning and advance your coaching career with an entrepreneurial mindset.
You can reach Coach McCall on Instagram: @justbmac_ or Twitter: @just_BryanM | Email Jon at: jonathan.jost@pepsico.com | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs
To learn more and join the Gatorade Performance Partner Community, visit GatoradePerformancePartner.com.
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Meet the 2026 NSCA Career Awards recipients and learn about their leadership, service, and contributions, which will be honored at the NSCA National Conference.