The V-up and Tuck-up

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The V-up combines the traditional sit-up with leg lifts to give you a challenging core exercise. Try doing V-ups two times per week with the goal of doing at least 15 each time. As you get stronger, increase your reps and/or add in an extra day of work. Tuck-ups are a good starting point if you are unable to perform multiple reps of the V-up.