While faster intervals can help you build speed and power, the recovery intervals allow your body to reset so you can get in more quality reps.

I’ll get bored after a few minutes on a given machine, but in a gym with multiple options, why choose? You can do a 5-minute round of intervals on the treadmill, then switch to the elliptical ...

This HIKEology fitness class based on interval workouts caters to people who hate running but want the same results.

The interval approach can also be incorporated into exercises we are already doing, rather than having to go to a specialised gym class.

New class at Life Time Athletic in Laguna Niguel offers yoga and high intensity interval training at eighty five degree heat for time crunched exercisers that want to get it all in.