A medicine ball is the ultimate one-stop gym: you can balance on it, press it, toss it and use it to add resistance to squats and lunges.
"I often get asked what piece of equipment is most crucial in a home gym set-up, and the answer is a pair of kettlebells," says Anna Block, kettlebell trainer and founder of BlockFIT.
You may have given up childish things long ago, but the skipping rope might need revisiting. When it comes to cardio fitness, agility and strength, jumping rope is a super-efficient way to achieve all three. First check the rope length; the handles should come up to your armpits when you stand in the middle of the rope.
"Foam rollers are a recovery tool that can help keep the body in great shape," says Erica King, founder of online women's running community Running Divas.
The best part about these little beauties is you can toss them in a bag and take them anywhere.
High intensity and muscle sculpting, boxing gives you a killer body (without you having to actually maim anyone!). It also requires intense mental focus, so it acts a bit like meditation.
A Swiss ball is great for working your core and improving balance.