1 - 3 Rounds of 40 seconds work/20 seconds rest:

1 leg calf raises L/R
1 leg shoulder elevated bridge L/R
Bulgarian hip hinges L/R
1 Leg TRX pistol L/R
Running step up L/R
1 Leg donkey calf raises L/R
1 Leg foot elevated bridge L/R
Bulgarian split squats L/R
1 Leg squat off the box L/R
Sprinter lunge with knee up L/R