Repeated sprint ability (RSA) may be one of the most important factors to consider when developing strength and conditioning programs for high-intensity repeated sprint sports. In this session from the NSCA’s 2016 Coaches Conference, Ernie Rimer reviews the latest science behind RSA, compares the pros and cons of RSA protocols performed in the laboratory and in the field, and suggests methods to improve RSA.
November 19, 2025by Lee Brown, PhD, CSCS, CSPS, TSAC-F, RSCC, Scott Caulfield, CSCS,*D, TSAC-F,*D, RSCC*E, Jim McDonald, CSCS, NSCA-CPT, TSAC-F, and Alexandra Cacioppo, MS, CSCS, TSAC-F, USAW-2
This article from TSAC Report shares a coaching philosophy than can bridge the communication gap between strength and conditioning professionals and firefighters Visit NSCA online to read more on tactical athletes and fitness news.
TSAC FacilitatorsExercise ScienceProgram designOrganization and AdministrationTesting and EvaluationClient Consultation|AssessmentSafetyBasic Pathophysiology and Science of Health Status or Condition, Disorder, or DiseaseProfessional Development
This NSCA Coach article provides a proposes a framework for standardizing SEB resistance training based on principles of kinetic and potential energy. Visit NSCA online to read more on exercise science and sport performance.
CoachesExercise ScienceExercise TechniqueProgram designOrganization and AdministrationTesting and EvaluationClient Consultation|AssessmentSafetyProfessional Development
The path to the top is not always linear. For Jill Costanza, it included returning to school and stops in collegiate and military performance before becoming Director of Sport Science and Assistant Strength and Conditioning Coach with the National Football League (NFL) Detroit Lions. Costanza describes today’s sport science landscape as a “Wild West,” where definitions differ by perspective. Her focus centers on assessing the athlete and program effectiveness against the demands of the game to identify holistic interventions. She outlines how intentional systems, a clear communication funnel, and data visualizations help athletes and stakeholders understand the “why,” build buy-in, and tap into competitiveness. Addressing common misconceptions, Costanza clarifies that elite athletes can still have foundational qualities that need rewiring. She emphasizes movement quality, proprioception, and breathing while adapting for individual needs and neurological fatigue. Learn how to build sport science systems, turn insights into action, and keep progressing on your professional path.
Reach out to Jill by email at: jill.costanza@lions.nfl.net | Find Eric on Instagram: @ericmcmahoncscs and LinkedIn: @ericmcmahoncscs
Join the NSCA Football Special Interest Group (SIG) and explore 24 other specialized communities designed to support your development on the Special Interest Groups page.