A good ab workout at home needs nothing but a mat and about 15 minutes: pick exercises that train your core in different ways (bracing, curling, rotating and resisting rotation), do 2-3 rounds, and repeat it 2-3 times a week. Below are 8 no-equipment exercises, exactly how to do each one, and a ready-made routine for beginners and for people who already train.
One honest note before you start. Ab exercises make your core stronger and more stable, but they do not burn the fat that sits over your stomach. If a flatter belly is the goal, that comes from an overall calorie deficit and full-body training; we explain why in Can You Lose Belly Fat With Ab Exercises?. Strong abs are still worth building: they help you hold good posture, protect your lower back during squats and push-ups, and make almost every other exercise feel more solid.
What your "abs" actually are
Your core is more than the six-pack muscle. When you plan an ab workout, it helps to know what you are training:
- Rectus abdominis: the long muscle at the front. It curls your trunk forward (crunches, leg raises).
- Obliques: on the sides. They rotate and side-bend your trunk, and stop it from twisting when you don't want it to.
- Transverse abdominis: the deep layer that wraps around you like a belt. It is what you use when you brace, as in a plank.
- Hip flexors and lower back muscles: they work alongside the abs in most core moves.
A balanced routine hits all of these. Doing 100 crunches a day trains only one of them, and often strains your neck in the process.
The 8 exercises
Do these on a mat or carpet. Move slowly; with core work, control matters far more than speed.
1. Dead bug
Lie on your back, arms pointing at the ceiling, knees bent at 90 degrees above your hips. Press your lower back gently into the floor. Slowly lower your right arm behind your head and straighten your left leg toward the floor, stopping before your back lifts. Return and switch sides. Cue: breathe out as you extend. Do: 8-10 per side.
2. Forearm plank
Forearms on the floor, elbows under shoulders, body in a straight line from head to heels. Squeeze your glutes and pull your belly button lightly toward your spine. Do: 20-45 seconds. If your hips sag or your lower back aches, stop the set. The plank guide covers form and how long to hold it in detail.
3. Crunch
Lie on your back, knees bent, feet flat. Fingertips lightly behind your ears or arms crossed on your chest. Curl your shoulder blades off the floor by shortening the distance between your ribs and hips, pause, then lower slowly. Cue: keep a fist-sized gap between chin and chest; don't pull on your head. Do: 12-15 reps.
4. Reverse crunch
Lie on your back, knees bent at 90 degrees above your hips, arms by your sides. Use your lower abs to curl your hips a few centimetres off the floor, bringing your knees toward your chest, then lower with control. Cue: it's a small movement; don't swing your legs. Do: 10-15 reps.
5. Side plank
Lie on your side, elbow under shoulder, legs stacked. Lift your hips so your body forms a straight line. Beginners can bend the knees and keep them on the floor. Do: 15-30 seconds per side.
6. Bicycle crunch
On your back, hands lightly behind your head, legs raised. Bring your right elbow toward your left knee while straightening your right leg, then switch. Cue: rotate from your ribs, not by yanking your elbow; slow is better. Do: 10-12 per side.
7. Mountain climbers
From a high plank, drive one knee toward your chest, then switch legs in a steady rhythm. Keep your hips level with your shoulders. This one adds a cardio element. Do: 20-30 seconds. More technique in our mountain climbers guide.
8. Bird dog
On hands and knees, hands under shoulders, knees under hips. Extend your right arm forward and left leg back until both are level with your body, hold for two seconds, return and switch. Cue: imagine a glass of water on your lower back that must not spill. Do: 8-10 per side.
The routine
Beginner version (about 12 minutes)
Do each exercise once, rest 20-30 seconds between exercises, then rest 60-90 seconds and repeat for 2 rounds in total.
- Dead bug: 8 per side
- Forearm plank: 20 seconds (knees down if needed)
- Crunch: 10 reps
- Reverse crunch: 8 reps
- Side plank on knees: 15 seconds per side
- Bird dog: 8 per side
Standard version (about 15-18 minutes)
All 8 exercises in the order above, rest 15-20 seconds between exercises and 60 seconds between rounds, 3 rounds. Use the higher end of each rep or time range.
How often
Two or three sessions a week on non-consecutive days is plenty. Your core also works hard during squats, lunges and push-ups, so you don't need a separate ab day every day. A sensible week might look like this:
- Monday: full-body workout, then the ab routine
- Wednesday: full-body workout
- Friday: full-body workout, then the ab routine
- Other days: walking or rest
If you are not sure how to arrange the rest of your week, see how many days a week you should work out.
How to progress
When the standard version feels easy for two sessions in a row, change one thing at a time:
- Longer holds: add 5-10 seconds to planks and side planks.
- Slower reps: take 3 seconds to lower each crunch or reverse crunch.
- Harder variations: straight-leg dead bug, side plank with top leg raised, plank with shoulder taps, lying straight-leg raises (only if your lower back stays down).
- Less rest: cut rest between exercises to 10 seconds.
If something is too hard, go back a step: bend your knees, shorten the range, or reduce the hold time. There is no prize for grinding through bad form.
Common mistakes
- Pulling on your neck. In crunches and bicycles, your hands only support your head. If your neck hurts, cross your arms on your chest instead.
- Arching the lower back. In dead bugs, leg raises and planks, a lower back that peels off the floor or sags means the exercise is too hard right now. Shorten the lever.
- Holding your breath. Breathe out on the effort, breathe steadily during holds.
- Rushing. Fast, sloppy reps let momentum do the work. Slow down and your abs will feel it more.
- Only doing crunches. Include bracing (plank, dead bug) and anti-rotation (bird dog, side plank) as well.
Who should be careful
If you have lower back pain, start with dead bugs, bird dogs and short planks and skip crunches and leg raises until you know how your back reacts; our lower back exercises are a gentle place to begin. After pregnancy, or if you notice a bulge or doming along the middle of your stomach during crunches, talk to a doctor or a women's health physiotherapist before doing traditional ab work. Stop any exercise that causes sharp pain, and see a doctor if pain persists.
FAQ
Can I train abs every day?
You can do light core work daily, but it isn't necessary and doesn't speed up results. Two or three focused sessions a week, plus the core work you get from full-body exercises, is enough for most people. Your abs, like any muscle, get stronger during recovery.
How long until I see abs?
That depends mostly on body fat, not on the ab workout. The muscles get stronger within a few weeks, but they only become visible when overall body fat is low enough. Steady, sensible fat loss through diet and exercise is what reveals them.
Are planks better than crunches?
Neither is "better"; they train different jobs. Planks teach your core to hold your spine still, crunches train it to curl. A good routine uses both, plus rotation and anti-rotation work.
Do I need equipment for a good ab workout?
No. Every exercise above uses only bodyweight. If you'd rather not plan it yourself, FIThim can build a workout that includes core exercises from the focus areas you choose, with a photo and short demo for each move.