core

Medicine Ball Sit-Up

A weighted sit-up variation using an overhead medicine ball to add resistance to a full sit-up.

How to do it

1Lie on your back with knees bent and feet flat on the floor, holding a medicine ball with both hands extended straight overhead.
2Brace your core and curl your torso up off the floor, keeping the ball extended in line with your ears as you rise.
3Continue until your torso is vertical or nearly vertical, pausing briefly at the top.
4Lower back down under control, keeping tension in your abs the whole way.

Common mistakes

Using the arms to fling the ball forward for momentum instead of driving the movement from the abs.
Yanking the torso up quickly instead of curling up under control, which increases strain on the lower back.

Sets & reps by goal

Goal	Sets	Reps	Rest
Strength	2-3	8-12	60-90 sec
Build muscle	2-3	10-15	45-60 sec
General fitness	2-3	12-15	45-60 sec

Ranges reflect the same goal-based logic used by the workout plan tool. Actual set count in a generated plan also depends on how often this muscle group appears elsewhere in your week.

Frequently asked questions

Is the Medicine Ball Sit-Up safe for beginners?

Yes. The Medicine Ball Sit-Up is tagged as beginner-friendly in GetFitArchitect's exercise database, meaning it doesn't demand much prior strength or mobility. Start with a weight or resistance level where you can complete every rep with good form, and only add load once that feels controlled.

What muscles does the Medicine Ball Sit-Up work?

The primary mover is your core. As a core movement, it also involves your hip flexors and lower-back stabilizers.

What can I substitute if I don't have medicine-ball for the Medicine Ball Sit-Up?

The Plank targets the same primary muscle with different equipment, so it's a reasonable swap if you don't have medicine-ball available.

See the Plank

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