About this workout
Most 30 day ab challenges are a calendar telling you to do 40 crunches on day 12 and 45 on day 13. That is not a program, it is arithmetic. Adding reps to an easy movement makes you better at doing lots of easy reps and nothing else. This challenge runs five short sessions a week for four weeks, changes the difficulty of the movements rather than the count, and ends with a test day so you can see in numbers what changed. It takes ten minutes and it needs no equipment.
Who This Program Is For
- You want a short, defined block with a start date and an end date.
- You are new to training or getting back into a routine and want an easy win.
- You have no equipment and ten minutes a day.
- You like having something to measure at the end.
Who this is NOT for: If you are an experienced lifter, thirty days of bodyweight ab work is not going to move anything for you; run a loaded program instead. And this is a training challenge, not a diet challenge. Thirty days of ab work with no change to how you eat will not change how your stomach looks, and any plan that tells you otherwise is selling something.
What You'll Need
- A mat, a towel or a carpeted floor.
- A timer, which your phone already has.
- 10 minutes on five days a week for four weeks.
The Program
Five sessions a week, two days off, four weeks. Each day has a different job so nothing gets hit hard two days running. Day 5 is a test day that you repeat in week 1 and week 4, and the numbers from those two sessions are the whole point of the challenge. Rest 30 seconds between sets. If a session takes more than twelve minutes you are resting too long.
| Day 1 | |||
|---|---|---|---|
| Flexion | |||
| Exercise | Sets | Reps | Rest |
| Crunches | 3 | 15-20 | 30 sec |
| Reverse Crunch | 3 | 12-15 | 30 sec |
| Plank | 3 | 30 to 45 second hold | 45 sec |
| Day 2 | |||
|---|---|---|---|
| Lower Emphasis | |||
| Exercise | Sets | Reps | Rest |
| Bottoms Up | 3 | 10-12 | 45 sec |
| Flutterkicks | 3 | 30 second effort | 30 sec |
| Hollow Body Hold | 3 | 15 to 30 second hold | 45 sec |
| Day 3 | |||
|---|---|---|---|
| Obliques | |||
| Exercise | Sets | Reps | Rest |
| Oblique Crunch | 3 | 15 each side | 30 sec |
| Russian Twist | 3 | 20 total | 30 sec |
| Side Plank | 3 | 20 to 40 second hold each side | 45 sec |
| Day 4 | |||
|---|---|---|---|
| Mixed | |||
| Exercise | Sets | Reps | Rest |
| Sit Ups | 3 | 15-20 | 45 sec |
| Lying Heel Touch | 3 | 15-20 | 30 sec |
| Mountain Climbers | 3 | 30 second effort | 45 sec |
| Day 5 | |||
|---|---|---|---|
| Test Day | |||
| Exercise | Sets | Reps | Rest |
| Plank | 1 | Max hold, write it down | 2 min |
| Hollow Body Hold | 1 | Max hold, write it down | 2 min |
| Crunches | 1 | Max clean reps in 2 minutes | Done |
How to Progress
Four weeks is short, so the progression is deliberate and it is not about reps.
Week 1. Run every session at the bottom of the rep and time ranges. Test on day 5 and write the three numbers down somewhere you will not lose them. This is your baseline.
Week 2. Work to the top of every rep range and add 10 seconds to every hold. Knees stay bent on all leg work.
Week 3. Slow every rep down so the lowering takes three seconds. The rep count stays the same and the sets get much harder. Legs straighten on bottoms up and heel touches.
Week 4. Arms go behind the head on crunches, sit ups and oblique crunches, and the hollow hold goes from tucked to long. On day 5 of week 4, retest the same three movements and compare to week 1. That comparison is the result of the challenge, not what the mirror says after thirty days.
Warm-Up and Recovery Notes
Ten slow cat cows and 20 seconds of hip flexor stretch each side. That is it.
Five days a week is the most ab work most people should do and there is no bonus round. Take the two rest days. If your neck aches, your hands are pulling on your head; cross them over your chest instead. If your lower back lifts off the floor during leg work, shorten the range until it stays down. Sharp pain anywhere, particularly in the lower back, means stop the session and get it looked at rather than finishing the day for the sake of the streak.
Nutrition and Supplementation
This is a training challenge and it will make your trunk stronger and more durable in four weeks. It will not visibly change your stomach unless your body fat comes down, and four weeks at a sensible 300 to 500 calorie daily deficit is two to four pounds. That is real, it is just not dramatic, and anyone promising you a visible six pack in thirty days is lying to you. Keep protein around one gram per pound of goal bodyweight so what you lose is fat.
Simple support: protein powder to hit protein without much thought, and a multivitamin if your diet has narrowed.
FAQ
What if I miss a day? Do it the next day and carry on. Missing one session out of twenty changes nothing. Quitting because you missed one changes everything.
Should I add more sets to go faster? No. The progression here is difficulty, not volume, and adding sets just makes you sore without making you stronger.
What happens after 30 days? Move to a longer plan with load, or roll straight into a home ab program that runs six to eight weeks. The gains from a four week block are real but small; the next block is where it compounds.
Questions and results
Ask a coach
Running this program? Tell us what week you are on and how the progression is going. A coach answers every question here.