Rest intervals between resistance training sets depend on your goal: 30 to 90 seconds for muscle growth, 3 to 5 minutes for strength and power, and under 2 minutes for endurance. Muscles rely on three ...

High-intensity interval training involves intense short workouts followed by rest periods, like Tabata. To gain muscle, you can try two 30-minute full-body workouts weekly with compound movements.

Lauren O’Connor, MS, RDN, is a health and lifestyle writer and five-time cookbook author based in Los Angeles. She is a registered dietitian with over 15 years of experience in the field, specializing ...