Add Yahoo as a preferred source to see more of our stories on Google. Should you really slow down your reps in the gym for muscle growth? Does it really matter how long each rep lasts? You might have ...

You can run all the miles on the road and do as many speed sessions on the track that you want, but the secret to getting that next PR likely comes in the gym. And we don’t mean more treadmill runs.

Myo-reps use high-intensity sets with short rests, boosting efficiency and muscle growth. Best for smaller, fast-recovering muscles; not recommended for major compound lifts. "Great for adding some ...