---
title: "3-4 Sit-up"
description: "Lie on your back with your knees bent and your feet flat on the floor, hip-width apart."
locale: en
slug: 3-4-sit-up
url: "https://hi.fitness/exercises/3-4-sit-up"
primaryMuscle: "Core"
secondaryMuscles: ["Quads"]
equipment: ["Bodyweight"]
category: "Strength"
format: "Reps"
video: "https://hi.fitness/exercise-media/public/video/c3b8ee68-3-4-sit-up_female.mp4"
updatedAt: 2026-10-20T13:27:29+00:00
---
# 3-4 Sit-up

Lie on your back with your knees bent and your feet flat on the floor, hip-width apart.

## How to do it

1. Lie on your back with your knees bent and your feet flat on the floor, hip-width apart.
2. Place your hands behind your head, keeping your elbows wide.
3. Engage your core and lift your upper body towards your knees, coming up about three-quarters of the way.
4. Slowly lower your upper body back to the starting position and repeat.

## Form tips

- Keep your core engaged throughout the exercise to avoid straining your lower back.
- Avoid pulling on your neck with your hands; use your abdominal muscles to lift your upper body.
- Breathe steadily, exhaling as you lift and inhaling as you lower.

## Similar exercises

- [Hanging Knee Raises](https://hi.fitness/exercises/hanging-knee-raises) - Core · Pull-up bar
- [Ab Wheel All the Way Out](https://hi.fitness/exercises/ab-wheel-all-the-way-out) - Core · Ab wheel
- [Captain's Chair Knee Raise](https://hi.fitness/exercises/captains-chair-leg-raise) - Core · Roman chair
- [Decline Sit Up](https://hi.fitness/exercises/decline-sit-up) - Core · Bench
- [Leg Raises (Straight Legs)](https://hi.fitness/exercises/leg-raises-straight-legs) - Core · Roman chair
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