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- Stand in front of a box that allows your knee to be at about a 90-degree angle or larger when you place your foot squarely on it.
- Hold a dumbbell in each hand by your sides.
- Step your right foot onto the box, then your left, so both feet are on top of the box.
- Softly step the right foot back to the ground, then the left.
- This counts as one rep.
- Complete 25 box step-ups.