The goal of this brief review is to describe what classifies as high-intensity interval training (HIIT) and summarize the potential benefits for various populations: athletic, general, and clinical.

Personal trainers and strength and conditioning coaches around the world are the frontline and display of any fitness facility. Common issues, such as sales techniques and member interaction/experience, can be qualities that are developed over time through employee education.

It is the job of the personal trainer to help clients reach their goals in a safe and effective manner. However, it can be easy to lose sight of the big picture of a client’s life and have tunnel vision on specific training aspects that may not matter.

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.

Ryan Metzger, Senior Assistant Strength and Conditioning Coach for Clemson University, talks to the NSCA Coaching Program Manager, Eric McMahon, about their internship program going virtual amidst the pandemic to provide young strength coaches the education they need to grow despite the lack of in-person training. Topics of discussion also include early sport specialization and burnout, as well as being a role model for female athletes. Find Ryan on Instagram: @clemsonolystrength or @coach_metz | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

This excerpt from NSCA’s Essentials of Sport Science highlights the importance of quantifying training load for both programming and monitoring an athlete’s progression or regression over time.

Andrea Hayden, Assistant Strength and Conditioning Coach for the Minnesota Twins Major League Baseball (MLB) team, talks to the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about being great at your craft. Topics of discussion include how to train athletes in a sport you have never played and creating great career opportunities through education and networking. Find Andrea through Email: andreahayden@twinsbaseball.com | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

NSCA Tactical Program Managers, Jason Soileau (Military) and Mandy Nice (Public Safety), talk to the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about supporting those in the tactical professions over the course of their careers. Topics under discussion include the U.S. Army Holistic Health and Fitness (H2F) program and developing a new tactical strength and conditioning program tool kit for public safety agencies. Find Jason and Mandy on Facebook: NSCA Tactical Strength and Conditioning SIG | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

Darnell Clark, Director of Strength and Conditioning at Charlotte Country Day School in Charlotte, NC, talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about his path to becoming a high school strength and conditioning coach, the structure of his high school (Charlotte Country Day) strength and conditioning program, and giving back to the industry.

Mentorship isn’t flawless — and that’s where its power lies. Erik Hernandez, Associate Director for Sports Performance – Olympic Sports at the University of North Carolina (UNC) at Chapel Hill, has built his career on turning imperfect scenarios into lasting lessons for athletes and young coaches alike. For over 14 years at UNC, he has guided lacrosse, volleyball, and golf, adapting his voice to each culture while holding firm to shared standards of accountability and growth. Hernandez streamlines training into a three-phase model — explosive, strength, and remedial — yet emphasizes that delivery and communication matter more than complexity. He reminds athletes, “modifications are part of progress,” linking health, recovery, and seasonal demands to long-term development. For interns and early-career coaches, his advice is clear: earn mentors by serving others, and learn from every scenario, even the imperfect ones. Hear how mentorship, adaptability, and athlete health point the way forward for stronger teams and longer careers. Reach out to Coach Hernandez on Instagram: @hernandezstrength or by email: ehhernan@email.unc.edu | Find Eric on Instagram: @ericmcmahoncscs and LinkedIn: @ericmcmahoncscs Answer Bryan Mann’s “call to arms!” Many volunteer applications are open now through December 15. Step up and give back to your strength and conditioning community at NSCA.com/Volunteer.