Most people train their abs with crunches and call it done. EMG (electromyography) research — which directly measures muscle electrical activity during exercise — tells a more nuanced story. The exercises that feel the hardest are not always the ones producing the most muscle activation, and a set of exercises that develops genuine core strength looks quite different from a generic “ab workout.” This guide ranks the best ab exercises by muscle activation data, functional carry-over, and practicality.
Understanding Core Anatomy
Before selecting exercises, understanding what you are actually training matters. The “core” is not just the rectus abdominis (the six-pack muscle). It encompasses:
- Rectus abdominis — the central vertical muscle responsible for spinal flexion and the visible six-pack appearance
- Obliques (internal and external) — the diagonal muscles on the sides responsible for rotation, lateral flexion, and anti-rotation stability
- Transverse abdominis — the deep stabilising layer that acts as a natural weightlifting belt, providing intra-abdominal pressure and spinal protection
- Erector spinae — the back extensors that work in opposition to the abdominals for balanced core stability
An effective core programme trains all of these — not just the rectus abdominis. For a full anatomy breakdown and exercise selection guidance, see our comprehensive core exercises guide.
The Best Ab Exercises, Ranked
1. Ab Wheel Rollout — The Highest Activation Exercise Available
The ab wheel rollout consistently produces the highest rectus abdominis and oblique EMG activation of any ab exercise measured in research — significantly higher than crunches, sit-ups, or cable crunches. The movement requires the anterior core to resist spinal extension under load, creating intense tension through the full range of motion from fully extended to fully contracted. Unlike most ab exercises, it simultaneously loads the lats, shoulders, and hip flexors, making it a genuinely full-chain core exercise.
How to perform: Kneel on a mat with hands on the wheel. Brace your core maximally and slowly roll forward, keeping your hips in line with your torso (no sag). Roll out as far as you can maintain control, then pull back to the start position using your abs. Regression: reduce range of motion. Progression: perform from standing.
Programme inclusion: 3–4 sets of 8–12 reps. Rest 90 seconds between sets. Include 2–3 times per week.
2. Hanging Leg Raise — Best for Lower Rectus Abdominis
The hanging leg raise is one of the most effective exercises for the lower portion of the rectus abdominis — an area that many horizontal ab exercises fail to adequately load. The movement requires controlled posterior pelvic tilt at the top of the movement to achieve full rectus activation; simply raising the legs to horizontal is insufficient. The added grip strength and lat engagement from hanging also makes it a more complete upper-body exercise than its common classification suggests.
How to perform: Hang from a pull-up bar with a firm grip. Keeping legs straight, raise them until they are parallel with the floor or higher, focusing on posterior tilting the pelvis at the top (rounding the lower back slightly). Lower under control — do not swing. Regression: bent knee raises. Progression: toes to bar.
Programme inclusion: 3 sets of 10–15 reps. Pair with a pushing movement for time efficiency.
3. Cable Crunch — Best Loaded Flexion Exercise
The cable crunch stands apart from floor-based crunches because it provides external resistance that can be progressively overloaded — the fundamental principle that drives muscle growth. Floor crunches cannot be made harder without changing the exercise; cable crunches can be loaded infinitely by adding weight to the stack. Consistent progressive overload on the rectus abdominis is what produces visible ab development over time, not high-rep bodyweight crunches.
How to perform: Kneel in front of a cable machine with a rope attachment at high pulley. Hold the rope beside your head and flex your spine forward and down, bringing your elbows toward your knees. The movement is in the spine, not the hips — focus on shortening the distance between your sternum and pelvis. Hold the contracted position briefly before returning.
Programme inclusion: 3–4 sets of 12–20 reps. Add weight as you can complete the top of the rep range with good form.
4. Plank and Variations — Best Anti-Extension Isometric
The plank is overused as a standalone exercise but genuinely effective as part of a comprehensive core programme — particularly for training the transverse abdominis and building the isometric endurance required for spinal stability during compound lifts. The key is maximal bracing: a plank held with passive shoulders and a sagging hip is not the same exercise as one held with maximal full-body tension.
Effective plank variations:
- RKC Plank — squeeze glutes maximally, drive elbows toward feet and feet toward elbows simultaneously. Dramatically increases core activation over a standard plank.
- Long lever plank — elbows positioned further forward than in a standard plank, increasing the mechanical disadvantage and activation demand.
- Plank with shoulder tap — introduces an anti-rotation element that activates the obliques more than a static plank.
Programme inclusion: 3–4 sets of 20–45 second holds for RKC and long lever variants. Avoid training planks to time accumulation without focus on maximal tension — quality over duration.
5. Pallof Press — Best Anti-Rotation Exercise
The Pallof press is a cable or band exercise that trains the obliques and transverse abdominis by resisting rotation — making it a highly functional exercise that transfers directly to sports performance and protects the spine under rotational loads. EMG data shows high oblique activation, and the anti-rotation demand cannot be replicated by most traditional ab exercises.
How to perform: Stand sideways to a cable machine or anchored band at chest height. Hold the handle at your sternum, then press directly out in front of you — resisting the rotational pull of the cable. Hold for 1–2 seconds, then return. Keep your hips and shoulders square throughout.
Programme inclusion: 3 sets of 10–12 reps each side. Add resistance progressively as the exercise becomes manageable.
6. Dead Bug — Best for Transverse Abdominis and Core Coordination
The dead bug is one of the most effective exercises for the transverse abdominis — the deep stabilising layer that provides intra-abdominal pressure and protects the spine during heavy compound lifts. It also trains contralateral limb coordination and teaches the fundamental skill of maintaining a neutral spine under moving limb loads — a movement pattern that directly transfers to every other exercise you perform.
How to perform: Lie on your back with arms pointing to the ceiling and knees bent at 90 degrees in the air. Press your lower back firmly into the floor — this must be maintained throughout. Simultaneously lower one arm overhead and the opposite leg toward the floor, keeping both straight. Return and repeat on the other side. If your lower back lifts off the floor, reduce the range of motion.
Programme inclusion: 3 sets of 6–10 reps per side. Prioritise control over range of motion.
How to Programme Ab Training
Contrary to popular programming, the abs do not need to be trained every day — they are skeletal muscle and respond to the same recovery principles as any other muscle group. Training them 3–4 times per week is optimal, with at least one rest day between sessions. Each session should include at minimum one flexion exercise (cable crunch, rollout), one anti-extension or isometric (plank, dead bug), and one anti-rotation or rotation exercise (Pallof press, hanging leg raise).
The Truth About Visible Abs
Ab exercises develop the muscle. Visible abs require low enough body fat that the overlying adipose tissue does not obscure them — typically under 12–15% body fat for men and 18–22% for women. No amount of ab training changes this. The pathway to visible abs is a combination of building the rectus abdominis through progressive loading and reducing body fat through a caloric deficit sustained over time.
This is not to diminish ab training — a strong core meaningfully improves performance on every compound lift, reduces injury risk, and improves posture. But if visible abs are your goal, the training in this guide needs to be paired with dietary management. Our weight management guide covers the dietary side, and our HIIT training guide covers the most time-efficient cardio approach for fat loss.
For complete training guides covering every other muscle group alongside core, see our full exercise guide library.
