So, if you’re pressed for time and need to hit every muscle in a 20-minute blow, give his workout a go. If you’re unsure as to whether a full-body workout will be able to build muscle as well ...

Enter: these fun running ... for a lengthy workout. How to do it: Decide how long you want to stride for and break that time up into 5-minute cycles, Stonehouse says. So, for a 20-minute run ...