A strong core does far more than look good in the mirror. Your abs and obliques transfer force between your upper and lower body, help support your spine under load, and keep your torso rigid when you squat, deadlift, run, or carry groceries. The best ab training hits the core through every function it has, not just endless crunches. Below are eight proven exercises, each with sets, reps, and form cues, drawn from FORMA's exercise library. Pair them with the calorie math from our TDEE Calculator, because visible abs are built in the kitchen as much as the gym.
How the core actually works (and why crunches alone fall short)
Your core is not one muscle. It includes the rectus abdominis (the six-pack), the obliques (the sides of your waist), the deeper transverse abdominis, and the spinal erectors at the back. These muscles do three main things:
- Anti-extension and bracing — resisting the spine bending backward (planks, ab wheel rollouts, dead bugs).
- Anti-rotation and rotation — resisting or producing twist (side planks, bicycle crunches, Russian twists).
- Spinal flexion — curling the ribcage toward the pelvis (cable crunches, leg raises).
A program that only does crunches trains one job and ignores the rest, which is why so many people have endurance but little real bracing strength. The eight exercises below cover all three patterns. Train two or three of them per session, rotating the categories, and your core gets strong in every direction it's asked to work. Browse the full exercise library for step-by-step guides on each movement.
1. Plank — the anti-extension foundation
The plank is one of the simplest and most transferable core exercises there is. By holding a rigid straight line on your forearms, you train the deep core to brace and support the spine, the same skill that helps keep your back stable during heavy squats and deadlifts.
How to do it: Set your forearms on the floor, elbows under shoulders, body in one straight line from head to heels. Squeeze your glutes, brace your abs as if bracing for a punch, and hold without letting the hips sag or pike.
Sets and reps: 3 holds of 30-60 seconds, about 45 seconds rest.
Quality beats duration here. A tight 40-second plank does more than a sloppy three-minute one. Once 60 seconds is easy, progress by adding a light weight plate on your back or lifting one foot rather than simply holding longer.
2. Hanging leg raise — top-tier lower-ab and grip builder
The hanging leg raise is one of the hardest and most effective bodyweight ab movements. Hanging from a bar removes any help from the floor, so your abs do the work of lifting your legs while your grip and lats stabilize. You'll find it and its progressions in the exercise library.
How to do it: Hang from a pull-up bar, shoulders active. Curl your pelvis under and raise your legs toward the bar, then lower slowly without swinging.
Sets and reps: 3 sets of 8-15 reps, 60 seconds rest.
The key cue is to curl the pelvis up, not just lift the legs with your hip flexors. If straight legs are too hard, start with bent knees (a hanging knee raise) and straighten them gradually as you get stronger.
3. Ab wheel rollout — elite anti-extension strength
The ab wheel rollout builds some of the strongest, most stable cores in the gym. As you roll the wheel away, gravity tries to extend your spine, and your entire front core must fight to keep the body from collapsing.
How to do it: Kneel and grip the wheel under your shoulders. Brace hard and roll out as far as you can control while keeping your hips from sagging, then pull back in.
Sets and reps: 3 sets of 8-12 reps, 60 seconds rest.
This is an advanced move. Don't let the lower back arch or the hips drop — that means you've rolled past your current strength. Start with short rollouts and a controlled range, then extend the distance over weeks. If you don't own a wheel, a loaded barbell on the floor rolls similarly.
4 & 5. Cable crunch and bicycle crunch — building the six-pack
These two directly train the rectus abdominis through spinal flexion, the part most people think of as "abs."
The cable crunch is the abs' answer to progressive overload. Bodyweight crunches plateau fast, but the cable lets you add weight just as you would on a squat. Kneel facing a cable stack with a rope behind your head, crunch down by bringing your ribcage toward your pelvis, then return under control. Do 3 sets of 12-20 reps. Keep the hips fixed and move only the spine — don't pull with the arms.
The bicycle crunch ranked at the top of a well-known ACE-commissioned EMG study for rectus abdominis and oblique activation, because it pairs flexion with rotation. Lie back, hands lightly by your ears, and bring one elbow toward the opposite knee while extending the other leg, alternating smoothly. Do 3 sets of 15-20 reps per side. Rotate from the core, not the neck — never yank your head with your hands.
6, 7 & 8. Dead bug, side plank and Russian twist — stability and obliques
This trio builds anti-rotation strength and a strong, stable waist.
The dead bug is one of the safest core moves for beginners and sensitive backs. Lie on your back, arms and knees up, then slowly extend your opposite arm and leg while keeping your lower back pressed flat. Do 3 sets of 10-12 reps per side. If the back arches off the floor, you've gone too far.
The side plank trains the obliques to resist sideways bending. Stack your body in a straight line on one forearm and hold 3 sets of 30-45 seconds per side — don't let the hips drop.
The Russian twist adds rotational work that many athletes like. Sit, lean back slightly, lift your feet, and rotate side to side for 3 sets of about 20 reps. Move from the waist, not just the arms, and add a plate once bodyweight is easy. Step-by-step versions of all three are in the exercise library.
Your weekly plan — and why diet decides if abs show
You don't need daily ab work. The core recovers like any muscle and responds best to two or three focused sessions a week. Pick one move from each category per session:
- Anti-extension: plank, ab wheel rollout, or dead bug
- Rotation: side plank, bicycle crunch, or Russian twist
- Flexion: cable crunch or hanging leg raise
Progress with progressive overload — add reps, time, or load over the weeks. For a fully customized routine, try the AI Workout Builder.
Now the honest part: everyone already has abs, hidden under body fat, and no amount of crunching burns fat from one spot — spot reduction is a myth. Visible abs typically start to appear around 10-14% body fat for men and 18-22% for women, though this varies by person and genetics. Use the TDEE Calculator to estimate maintenance calories, eat slightly below that, prioritize protein, and track the trend with the Weight Tracker and Body Fat Calculator. Train the abs for strength; let nutrition reveal them.
Key takeaways
- The best ab training covers three core jobs: anti-extension (plank, ab wheel, dead bug), rotation/anti-rotation (side plank, bicycle crunch, Russian twist), and flexion (cable crunch, hanging leg raise).
- Train your core 2-3 times per week, not daily, picking one exercise from each category per session.
- Progress your abs like any muscle: add reps, hold time, or load (the cable crunch and ab wheel are easiest to overload).
- You can't spot-reduce belly fat. Visible abs require an overall calorie deficit, which you can plan with the TDEE Calculator.
- Form beats reps and duration. A tight 40-second plank or a controlled 8-rep leg raise outperforms sloppy high-volume sets.
Frequently asked questions
What is the single best ab exercise?
There's no single best move because the core has multiple jobs. If forced to pick one, the plank is the most foundational, training the deep bracing strength that supports your spine and carries over to every other lift. For visible muscle growth, the cable crunch is a top choice because you can progressively add load.
How often should I train abs?
Two to three focused sessions per week is ideal, with at least a day between hard sessions. The core recovers like any other muscle and doesn't need daily work. Pick one exercise from each category (anti-extension, rotation, flexion) per session and progress over time.
Will ab exercises give me a six-pack?
Ab exercises build the muscle, but they won't make it visible on their own. Everyone already has abs; they're hidden under body fat. You'll see them only at a low enough body-fat percentage, which requires a calorie deficit. Use the TDEE Calculator to plan it, and train abs for strength and shape.
Can I get abs by doing crunches every day?
No. Daily crunches train one movement pattern (flexion) and ignore bracing and rotation, and they don't burn belly fat since spot reduction is a myth. They can also overwork the spine. A varied 2-3x weekly routine plus a calorie deficit is far more effective than endless daily crunches.
Are planks or crunches better for your abs?
They train different things, so the best programs use both. Planks build anti-extension and deep bracing strength that supports your spine under load. Crunches and cable crunches build the rectus abdominis through spinal flexion and are better for visible muscle size. Combine them rather than choosing one.
What is the best ab exercise for beginners?
The dead bug. It teaches the core to stabilize while moving the limbs, keeps the lower back safe with minimal spinal load, and is hard to do with bad form. The plank is a close second. Both build the bracing foundation you need before progressing to harder moves like the ab wheel rollout.