This is a complete 28-day core strength program built around eight ab mat exercises. You train three days per week with clear progression that takes you from foundation to genuinely strong over four weeks. The full program is below. You can start today.
The free PDF download gives you the printable version plus nine bonus materials, such as workout cards, a progress tracker, a scaling guide, and injury substitutions. The core program stays the same. The PDF simply adds tools that make it easier to finish.
Most core programs fail for one of three reasons. They're too random to build progression. They're too ambitious and burn people out by week two. Or they have no built-in way to measure whether the work is doing anything. This program solves all three. Week 1 builds your foundation. Week 2 adds volume. Week 3 pushes intensity. Week 4 tests your progress against your Week 1 baseline so you can see the numbers change.
Before you start, check your setup. Place the mat curved side up with the highest point of the curve just below your shoulder blades and your tailbone resting on the tailbone protector pad. Your shoulders should extend past the top of the mat at the bottom of every rep. If you are new to the mat, read How to Use an Ab Mat before starting Week 1. It is also worth reviewing the core training mistakes that kill progress, because most people begin with at least three of the eleven. For a full breakdown of equipment, see the home gym core equipment guide.
Who This Program Is For
This program works for three types of people.
Beginners who have never done structured core training. Start with the beginner variations. You will build strength safely and avoid injury or burnout.
Intermediates who train core occasionally but want a real program. The built-in progression will give you faster results than scattered workouts.
Advanced lifters who need a focused core block. Use the advanced variations, add weight where noted, and treat the Week 4 tests as true tests. Your numbers will likely surprise you.
The program uses three training days per week (Monday, Wednesday, Friday). If your schedule differs, train any three days with at least one rest day between sessions.
The 8 Core Exercises
Every workout uses some combination of these eight movements. Learn them before Week 1. For detailed form cues on each, see Ab Mat Exercises for Beginners.
1. Butterfly Sit-Up
Soles together, knees out. Lower fully onto the mat, sit up, reach forward.
2. Ab Mat Crunch
Feet flat, knees bent. Extend back over mat, crunch up until shoulder blades clear.
3. Oblique Crunch
Same as crunch. Rotate as you curl up, drive elbow toward opposite knee. Alternate sides.
4. Leg Raise
Lie face up on mat. Raise legs to 90°, lower slowly without arching lower back.
5. Prone Back Extension
Flip mat under hips. Lie face down, raise chest by squeezing lower back and glutes.
6. Plank Hold
Forearms on mat, body in straight line. Mat cushions elbows for longer holds.
7. V-Up
Lie flat, arms overhead. Simultaneously raise legs and upper body, reach for toes.
8. Hip Raise
Lie face up, legs straight at 90°. Push hips off floor by squeezing lower abs.
Week 1: Foundation
Focus on form. Learn the movements. Do not chase reps.
Before Day 1: Record your baseline. Do one max-effort set of butterfly sit-ups, one max plank hold, and one max V-up attempt. Write the numbers down. You will retest in Week 4.
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 10 | 3 | 45 sec |
| Ab Mat Crunch | 12 | 3 | 30 sec |
| Plank Hold | At your level | 3 | 45 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Oblique Crunch | 10 per side | 3 | 30 sec |
| Leg Raise | 10 | 3 | 45 sec |
| Prone Back Extension | 12 | 3 | 30 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 12 | 3 | 45 sec |
| V-Up | 8 | 3 | 45 sec |
| Hip Raise | 10 | 3 | 30 sec |
Week 2: Build
The exercises stay the same. Increase reps by 2–3 and reduce rest by 5–10 seconds. Form still comes first.
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 13 | 3 | 40 sec |
| Ab Mat Crunch | 15 | 3 | 25 sec |
| Plank Hold | +5 sec from Week 1 | 3 | 40 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Oblique Crunch | 12 per side | 3 | 25 sec |
| Leg Raise | 12 | 3 | 40 sec |
| Prone Back Extension | 15 | 3 | 25 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 15 | 3 | 40 sec |
| V-Up | 10 | 3 | 40 sec |
| Hip Raise | 12 | 3 | 25 sec |
Week 3: Push
Add a fourth set to two exercises per workout. Keep increasing reps and reduce rest to 20–30 seconds.
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 15 | 4 | 35 sec |
| Ab Mat Crunch | 18 | 3 | 20 sec |
| Hip Raise | 12 | 4 | 30 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Oblique Crunch | 14 per side | 3 | 20 sec |
| Leg Raise | 14 | 4 | 35 sec |
| Prone Back Extension | 18 | 3 | 20 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | 18 | 3 | 30 sec |
| V-Up | 12 | 4 | 35 sec |
| Plank Hold | +10 sec from Week 2 | 3 | 30 sec |
Week 4: Test
Benchmark week. Give maximum effort on the key exercises and see how far you have come.
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | Max reps | 3 | 60 sec |
| Ab Mat Crunch | 20 | 3 | 20 sec |
| Plank Hold | Max time | 3 | 60 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Oblique Crunch | 15 per side | 4 | 20 sec |
| Leg Raise | Max reps | 3 | 60 sec |
| Prone Back Extension | 20 | 3 | 20 sec |
| Exercise | Reps | Sets | Rest |
|---|---|---|---|
| Butterfly Sit-Up | Max reps | 1 | — |
| V-Up | Max reps | 1 | — |
| Plank Hold | Max time | 1 | — |
| Hip Raise | Max reps | 1 | — |
Write down your numbers. Compare them to your Week 1 baseline. The difference shows 28 days of consistent work.
What to Do After Day 28
You just completed 28 days of structured core training. That is more than most people manage in a year. Here are three practical ways to continue.
1. Repeat the program at a higher level. If you used beginner variations, run it again at intermediate. The exercises stay the same, but the challenge grows so you keep progressing.
2. Add weight. Hold a weight plate, dumbbell, or medicine ball during sit-ups, crunches, and V-ups. Even 5–10 pounds changes the feel of the entire program.
3. Integrate into your regular training. Pick two or three exercises from this program and add them to the end of your usual workouts. Three rounds after leg day keeps the core work going without extra sessions.
Whatever path you choose, keep training. The strength you built will fade if you stop. Give it a regular place in what you do next.
Get the Printable PDF + 9 Bonus Materials
The full program above is free to use. The PDF adds the tools that make it easier to actually finish.
- Complete 28-day program formatted for print
- 12 printable workout cards (one per training day)
- 5 bonus ab mat exercises
- 4-week progress tracker
- Exercise form cheat sheet
- Scaling decision tree
- Month 2 and beyond guide
- Injury & limitation substitutions
- Program methodology explained
Why Ab Mat Training Works
If you are investing 28 days in this program, it helps to know why the ab mat makes a difference. Three practical reasons stand out.
Extended range of motion. On the floor your back stops at the ground. On the mat your shoulders extend past the top of the curve, so your abs stretch further before every contraction. More range creates more muscle activation per rep.
Tailbone protection. Anyone who has done high-rep sit-ups on bare floor knows the tailbone often gives out first. The mat's tailbone protector pad lets you finish the sets your abs are actually ready for.
Lower back support. The curve follows the natural arc of your lumbar spine at the bottom of the movement. You get less strain and more comfort during longer sets.
For the full comparison, see Sit-Ups vs Crunches. If you do not have an ab mat yet, the Athlos Fitness Ab Mat has been the standard in CrossFit gyms, home gyms, and barre studios since 2014, with 4.5 stars across 1,836 verified Amazon reviews.