Updated On: 17 July, 2017 08:30 AM IST | Mumbai | Sonia Lulla
<p>Fitness professionals spill the beans on the dos and donts of the popular bit-sized regimes of the High Intensity Interval Training format</p>


Here's a fitness check, readers. It has been over six months since you made those New Year fitness resolutions. If you haven't managed to improve your fitness levels, here's your second shot.