This excerpt from Developing the Core briefly defines closed- and open-chain exercises and their respective roles in training.

Greg Haff, former President of the National Strength and Conditioning Association (NSCA), current course coordinator for post graduate studies in strength and conditioning at Edith Cowan University, and Senior Associate Editor for the Journal of Strength and Conditioning Research, talks to the NSCA’s Head Strength and Conditioning Coach, Scott Caulfield, about his journey through strength and conditioning and his efforts to progress the field during his time as president of the NSCA. Topics under discussion include: his years being NSCA Board of Director President, the future of the profession, how he got involved in the NSCA, key traits of icons in the field, traits for potential incoming students, and how to get into sports science.

Stuart Hart, Head Strength and Conditioning Coach for women’s basketball at the University of Nebraska, talks to the former NSCA Head Strength and Conditioning Coach, Scott Caulfield, about his journey from high school athlete to personal trainer to volunteer coach to full-time college strength and conditioning coach. Topics under discussion include a day in the life at the University of Nebraska, building relationships throughout the entire athletic staff, and the value of going to conferences for both educational and networking reasons. Find Stuart on Twitter: @No_DaysOff06 or Instagram: @strength_byhart

This Kinetic Select from NSCA’s Essentials of Personal Training, Second Edition gives a brief overview of respiratory adaptations, and how aerobic interventions of duration and intensity can be used for specific adaptations for endurance training.

Joe Siara, Manager of Peak Performance Programs for the New York Yankees Major League Baseball (MLB) team, joins NSCA Coaching and Sport Science Program Manager, Eric McMahon, to discuss the path from Minor League Baseball Strength and Conditioning Coach to sport scientist. The discussion includes a recap of the 2021 Professional Baseball Strength and Conditioning Coaches Society (PBSCCS) Baseball Sport Science Virtual Clinic, an explanation of the Certified Performance and Sport Scientist™ (CPSS™) exam development process, and practical applications of technology across a variety of performance settings. Find Joe via Email: jsiara@yankees.com | Find Eric on Instagram: @ericmcmahoncscs or Twitter: @ericmcmahoncscs

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.

Annette Zapp, Lieutenant Firefighter in Chicago, talks to the Former NSCA Head Strength and Conditioning Coach, Scott Caulfield, about strength and conditioning in the firefighting niche. Topics under discussion include the perks of being a firefighter who is also a Certified Strength and Conditioning Specialist® (CSCS®) and Tactical Strength and Conditioning Facilitator® (TSAC-F®), the typical lifestyles and attitudes of firefighters in general, and common issues that they face both physically and mentally. Find Annette on Twitter: @FireSQFitness or Instagram: @FireSQFitness

The ability to manage the adaptive response, handle accumulated fatigue, and capitalize on the aftereffects established from training is central to the training process.

Potentially, an instability training program that first involves static balance and then progresses to dynamic balance activities would improve intrinsic balance. This improvement in balance would increase movement confidence, releasing the neuromuscular system from a stiffening strategy to more unimpeded motion, force, and power development.

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.