Bodyweight
3/4 Sit Up
Abs · Core
Intermediate6
Demonstration
BeginnerIsolationBarbell
Weighted Seated Twist (On Stability Ball)
Abs · Core
3
sets
12–15
reps
45s
Rest time
~7
Calories / set
Instructions
- 1
Sit on a stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
- 2
Hold a weight plate or dumbbell with both hands close to your chest.
- 3
Engage your core and slowly rotate your torso to one side, keeping your hips stable.
- 4
Pause for a moment at the end of the rotation, then slowly return to the starting position.
- 5
Repeat the rotation to the other side.
- 6
Continue alternating sides for the desired number of repetitions.
Muscles worked
Primary
Abs
obliques
Secondary
obliqueslower back
Pro tips
- Move through the full range of motion under control.
- Keep tension on the target muscle — avoid using momentum.
- Breathe out on the effort, in on the return.
- Pick a weight that lets you keep clean form for every rep.
Common mistakes
- Using too much weight and sacrificing technique.
- Rushing reps instead of controlling the tempo.
- Cutting the range of motion short.
- Holding your breath throughout the set.
Safety notes
- Warm up thoroughly before working heavy.
- Stop immediately if you feel sharp or joint pain.
- Use a spotter or safeties for heavy barbell work.
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