RESTING FOR TOO LONG?: Fiddling with Twitter between sets in the gym? You may be ruining your results. Sticking to the right work/rest ratio is crucial, if you’re trying to add muscle or burn fat. Rest is one of the most untracked variables when it comes to working out, despite the fact it’s as important, if not more so, than exercise selection, reps or sets. Not tracking rest periods is the difference between a killer workout that hits all of the right growth hormone-inducing, fat-burning buttons and simply going through the motions.

Get a timer app for your ’phone and keep two eyes firmly on it. If you’re aiming for muscle gain, keep rest periods under two minutes. For fat loss, one minute or less.