High-intensity interval training (HIIT) — exercise defined by going all out for short periods of time, then taking rest periods — is a great way to build endurance and strength, get your heart rate up, and burn calories. You can try this five-move bodyweight HIIT workout from ISSA-certified personal trainer Melissa Kendter. It'll take you around 15 minutes, so tack on a quick warmup and cooldown as well.
More beginner HIIT workouts include this 20-minute one as well as this simple three-move Tabata session you can repeat twice to add up to Jenkins's suggested half-hour time frame. Tabata, by the way, is a specific kind of HIIT that follows a "20 seconds on, 10 seconds off" format (typically, each round is four minutes long). Here's a 15-minute Tabata workout you can repeat two times through as well as a 20-minute Tabata session, both from Class FitSugar. Make sure you're doing the modifications demonstrated if the moves are too difficult. Listen to your body!
