Devised by fitness trainer Vivienne Addo — one half of Mr and Mrs Muscle — the effective leg workout uses just a pair of dumbbells to help strengthen and tone a range of lower-body muscles, including ...

Work on perfecting your form before improving speed or going for higher reps. The donkey kickback is an effective exercise ... you jump up onto a box, which builds explosive power in your legs ...

That's why some people think of the squat as the king of exercises—and also why some form of squat should be the cornerstone of your leg day push ... like a squat, then jump, you'll lose out ...