Another study led by the University of Macau found that participants who performed 20-minute HIIT workouts 4 days a week for 5 weeks improved their oxygen consumption by 9%. Why is a HIIT workout ...

High-intensity interval training (HIIT) benefits include weight loss and fat loss, faster metabolism, improved heart health and lower stress and anxiety.

She creates safe, inclusive workout programs for everyone—including beginners and expectant or postpartum moms (and even filmed this HIIT workout 18-weeks pregnant!). This routine is structured ...

Today we're going to do a High-Intensity Interval Training workout, or HIIT, H-I-I-T. What we'll do is 20 seconds of an exercise, pushing as hard as you can, then taking 10 seconds' rest.