A new study, conducted under the leadership of IDEA author and presenter Len Kravitz, PhD, compared cardiovascular and metabolic responses to two exercise protocols: (1) six bouts of high-intensity interval training (HIIT) followed by three rounds of circuit weight training (CWT) and (2) CWT rounds interspersed with HIIT bouts. Fourteen trained young men (ages 25.7 ± 4.4) participated in the study, completing each of the two programs 3 days apart.
Adding programming that addresses strength training for women allows you to customize your offering and provide great client support. The key is in understanding muscle physiology and what women, specifically, need to succeed.
In nearly 40 years as a fitness educator, I have never been sidelined by a significant injury, in spite of decades of high-impact classes, rigorous weight training, participation in competitive aerobics, and group exercise schedules that sometimes exceeded 25 hours per week. I attribute my longevity in this grueling business to one thing—cross-training all aspects of fitness, including flexibility.