Work your legs and glutes with a combo of conditioning and cardio in this 20-minute session. You’ll need weights for the strength work in blocks 1 and 3 – if you don’t have any dumbbells, you could use a full backpack, bottles of water or heavy books. In blocks 2 and 4 you’ll be doing a couple of cardio exercises back to back in an AMRAP (as many reps as possible) style for 20 seconds each:

Block 1 – 1.5 goblet squats, goblet lateral lunges, forward and back lunges, Romanian deadlifts, single-leg bridges
Block 2 – explodes and curtsey jumps
Block 3 – 1.5 goblet squats, goblet lateral lunges, forward and back lunges, Romanian deadlifts, single-leg bridges
Block 4 – in-outs and side-to-side squats.