Weighted Split Squat

Step into a staggered stance with one foot well forward and the other well back, both feet planted on the ground for the whole set — unlike a lunge, you don't step in and out between reps. Hold a dumbbell in each hand at your sides and keep your torso upright. Lower straight down until your back knee nearly touches the floor and your front knee sits roughly over your ankle, then drive back up through your front foot. Your back foot stays put and mostly balances you rather than pushing. Finish all your reps on one side before switching your stance to work the other leg.