You’ve probably heard of high-intensity interval training by now, but in case you need a reminder: HIIT is a style of workout that alternates between intense bursts of activity and fixed periods of lower-intensity activity or rest. It’s one of the most effective and efficient ways to improve your fitness and burn calories. However, just because it’s high intensity, doesn’t mean it has to be high impact.
If you’ve been injured – or want to prevent injury –