Stair Jumps

This is a versatile exercise, in that you can do it almost anywhere and you can make it pretty tough if you want to. It's essentially the same movement as a box jump - except that you do it on some steps or stairs. The photo shows the seating in the sports hall at my gym, where there are three large steps and, conveniently, a set of smaller steps for jogging down or doing smaller jumps up.

Using stairs for jumping allows you, in effect, to do many consecutive box jumps, which can be pretty demanding if you find a long enough set of steps. You can try jumping multiple steps at a time to make each jump harder, or perhaps jump each step but do so as quickly as you can.