This excerpt from Strength Training, Second Edition briefly details hormones and their role in the human body.

This article presents ways to add variety to workouts using Bulgarian Bags as an alternative to kettlebells. It also provides an effective sample Bulgarian Bag program.

There is no argument that periodization is successful, and that different models can be applied with success in different fashions. The question of how shift work really affects a periodized program—more specifically firefighter shift work—is less clear.

Nearly all fitness professionals are forced to address low back pain (LBP) to some extent, regardless of the age or population with which they work. The purpose of this article is to shed light on contemporary research surrounding LBP.

Listen in as Angelo Gingerelli, Assistant Strength and Conditioning Coordinator at Seton Hall University in New Jersey, tells the NSCA Coaching and Sport Science Program Manager, Eric McMahon, about his journey in the strength and conditioning profession. Topics include working collaboratively as a strength and conditioning staff, positive social media practices, taking on additional staff responsibilities as an adjunct professor, and working with endurance athletes. You can reach out to Coach Gingerelli on Instagram: @finish_strong_book| Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

This article seeks to explain the differences between males and females in training and adaptations, as well as provide actionable guidelines to improve performance.

Lawrence Herrera, owner and founder of LH Performance, talks to the NSCA Head Strength and Conditioning Coach, Scott Caulfield, about how strong is strong enough, keeping the training simple, and relating to athletes and coaches.

This article explains the use of structured functional fitness programs for injury prevention and enhanced job performance in fire service personnel.

Circuit training is quick and effective way to induce training adaptations that are similar to the demands that tactical officers face in their career. This is a basic layout of a circuit training program that can be implemented to recruits during training to prepare them for the physical demands they will face.