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Power HIIT Builds More Strength and Improves Fitness in Less Time
These highly efficient workouts build lean muscle, increase your metabolism, and boost your mental strength.
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These highly efficient workouts build lean muscle, increase your metabolism, and boost your mental strength.
Here’s what you should eat before a high-intensity session to perform at your best.
A recent study explores how high-intensity interval training affects heart rate variability and resting heart rate, two metrics of overall cardiovascular and nervous system health.
This fast-paced training style can boost endurance and burn fat. Here’s how.
These multi-week programs will prepare you to be ready for anything—in sport or in life.
In her book, Next Level, female physiology expert Stacy Sims, Ph.D. reveals how women can work with their hormonal changes to achieve their goals.