A good home workout for the legs. No weights needed, but if you do have some that will add to the difficulty. Recoveries around 30-60s. If time is limited then combined two exercises together. So whilst recovering from squats for example you could be doing your calf raises. This could save you as much as 15 mins.

A great form of cross trainer for us runners. Keep that heart rate in Zone 2. You might feel like RPE is higher, as it’s a tough exercise, but a good opportunity to really improve your aerobic engine without the heavy impact of running.