Imagine a workout that burns fat and potently boosts your speed and agility. Sprint interval training (SIT) is a workout method that combines the benefits of high-intensity cardio with the ...

If you've ever given up on exercising because you didn't see results fast enough, then interval training ... of your workout will more than make up for the shorter workout sessions. Sprinting ...

Denise Austin shared a throwback workout clip on Instagram. In the video, Austin demonstrates an interval training workout complete with both cardio-based aerobic moves and targeted strength ...

Denise Austin shared a throwback workout clip on Instagram. In the video, Austin demonstrates an interval training workout complete with both cardio-based aerobic moves and targeted strength ...