It's one of the most simple moves but, do it right, and you're in for a whole host of benefits. It's the humble step-up exercise, of course! Or, if you're plumping for the weighted version, a dumbbell ...

Relatively simple but effective exercises are often particularly popular. Step-ups definitely fall into this category, primarily working our glutes and legs. They also burn calories at the same time.

It's commonly known as runner's knee, but you don't have to run to feel the pain of patellofemoral syndrome (PFPS). This condition occurs often in young athletes and female athletes especially.