Quick Answer
Three-Quarter Sit-Up is a beginner strength exercise that targets your abdominals. It uses only your bodyweight. Lie on back, knees bent, feet flat on floor.
Video Tutorial
How to Perform the Three-Quarter Sit-Up
- 1
Lie on back, knees bent, feet flat on floor.
- 2
Place hands behind head or across chest.
- 3
Engage core. Exhale and lift torso towards knees, stopping about three-quarters of the way up (roughly 45 degrees from floor).
- 4
Hold briefly, keeping abs contracted.
- 5
Inhale and slowly lower torso back down, stopping just before shoulders touch floor to maintain tension.
- 6
Repeat for desired repetitions.
Common Mistakes to Avoid
- !Rushing reps instead of controlling the lowering (eccentric) phase — aim for 2–3 seconds down.
- !Letting form break down as reps add up. Stop the set when technique slips, not when you physically can't do another rep.
- !Using momentum to swing through reps. Pause briefly in the contracted position to keep tension on the muscle.
Tips for Better Form
- ✓Breathe out during the effort (concentric) and breathe in on the return (eccentric).
- ✓Use a mirror or film yourself on your first session — your perceived form and actual form often differ.
- ✓Keep ribs down and lats engaged — this keeps tension on the core, not the hip flexors.
- ✓Don't worry about load — master the movement pattern with light weight or easier variations first.
Alternative Exercises
If the Three-Quarter Sit-Up isn't right for your body, equipment, or goal, try these similar exercises that hit the same muscle groups:
Frequently Asked Questions
What muscles does the Three-Quarter Sit-Up work?
The Three-Quarter Sit-Up primarily works your abdominals. Secondary muscles include the obliques.
What equipment do I need for the Three-Quarter Sit-Up?
The Three-Quarter Sit-Up needs no equipment — just your bodyweight. You can perform it at home or at the gym as long as you have what's listed.
Is the Three-Quarter Sit-Up suitable for beginners?
Yes. The Three-Quarter Sit-Up is a beginner-level exercise. Start with lighter load or fewer reps and focus on form before adding intensity.
How many sets and reps of Three-Quarter Sit-Up should I do?
For strength: 3–5 sets of 3–6 reps with longer rest (2–3 min). For hypertrophy (muscle growth): 3–4 sets of 8–12 reps with moderate rest (60–90 sec). For endurance: 2–3 sets of 15+ reps with short rest (30–45 sec). Adjust based on your program and goal.
Can I do the Three-Quarter Sit-Up every day?
No. Muscles need 48 hours to recover between heavy training sessions. If you want to train abdominals more frequently, alternate harder and easier variations and keep overall weekly volume moderate.