Toned and defined abs are possible for anyone, at any age.

No matter what age you are, beautifully defined abs are within reach! During this 7 day ab challenge, you will be performing workouts designed to challenge you and your midsection. These exercises will tone your abdominal muscles and help you shed the excess belly fat that lies above them.
We all want sleek & sexy abs, but the core musculature is also responsible for several important functions. Your core allows you to bend, rotate, and maintain posture. It also serves to protect and support your vital organs! Performing this ab challenge will not only make you look great, but also improve your quality of life!
There’s a lot more to creating toned and defined abs than basic crunches. The moves included in this routine will target each of the layers of your abdominal wall to ensure that you have a perfectly-sculpted core!
Before we get to the challenge, it’s important that you understand the role that your diet plays in earning 6-pack abs. In order to reveal all of your hard work, you must maintain a healthy eating plan. Following the 8 simple rules below will uncover those muscles for noticeable results!
Reveal Your Abs with these Healthy Eating Tips
1. Drink water throughout the day and always have some on hand when performing this challenge. Staying hydrated will help you lose the weight (and keep it off!)

Do you struggle with drinking enough water? Check out these 12 Easy Ways to Increase Your Water Intake.
2. Eat smaller portions. This will help you keep your daily calorie count lower.
Learn How to Lose Weight with Portion Control and begin working towards your goals, today!
3. Eliminate refined sugar and white flour. Instead, eat whole grains and foods that don’t have added sugar. Whole foods are generally less calorie dense but contain way more vital nutrients than processed foods do.
Check out this Whole Foods Shopping List.
4. Increase protein intake. Protein will tone your muscles and increase fat burn!
Try these 5 Protein-Packed Menus for a Flat Stomach.
5. Avoid sodas (diet included). Even diet soda can cause you to crave more sugary, processed foods.
6. Speed up your metabolism by eating more often (5-6 times each day). Remember, meals should not be the standard restaurant portions but rather mini meals. Eating on salad plates instead of dinner size plates is a good start. When your body is well-nourished, it will let go of excess fat more easily.
7. Never skip breakfast! Making healthy choices in the morning will help you continue making healthy choices all day long.
Try these delicious and nutritious Skinny Ms. Breakfast Recipes.
8. After this challenge has ended, be sure to continue doing ab workouts three times weekly.
You will find lots of routines right here at Skinny Ms!

The 7 Day Ab Challenge
What you need: a Yoga Mat / an Interval Timer
What you do: Follow the instructions given for each day! We’ve included instructional videos for each exercise towards the bottom of this post to ensure that you are using proper form.
Day 1
Complete the following exercises, one after the other, with little to no rest in between moves.
1. Bob Harper’s Ab Challenge – 3 minute video
2. Bob Harper’s Set ups – Complete 25 reps
3. Leg Lifts – 25 reps
4. Reach Through – 25 reps
Day 2
10-Minute ABS Workout
Perform each exercise for 45 seconds, resting for 15 seconds in-between. Complete 1 full circuit. Video includes:
1. Flutter Kicks
2. Reaching Oblique Crunch
3. Side Plank Raises (right)
4. Side Plank Raises (left)
5. Russian Twist
6. Toe Touch Crunches
7. Leg Pulls (down)
8. Leg Pulls (up)
9. Top Taps
10. Knee Tucks
Day 3
Today we’ll be doing 2 interval circuits. This type of workout is hardcore, but effective. You will need 9 minutes for today’s workout.
Here’s how it works:
Complete routine #1, twice. Rest 1 minute. Perform routine #2, twice. Each routine will take 4 minutes. This workout will continue to burn fat for up to 24 hours!
Routine #1
1. Mountain Climbers – 20 seconds
Rest – 10 seconds
2. Scissors – 20 seconds
Rest – 10 seconds
3. Knees In and Out – 20 seconds
Rest – 10 seconds
4. V-Ups – 20 seconds
Rest – 1 minute
Routine #2
1. Toe Touch – 20 seconds
Rest – 10 seconds
2. Bicycle Crunch – 20 seconds
Rest – 10 seconds
3. Russian Twists – 20 seconds
Rest – 10 seconds
4. Prone Plank – 20 seconds
Rest – 10 seconds
Day 4
Rest/Recovery Day

Day 5
Complete 3 circuits. Move from one exercise to the next with little to no rest.
1. Flutter Kicks – 30 reps (15 each side)
2. Side V-ups – 20 reps (10 each side)
3. Reach Through – 30 reps
Day 6
10-Minute ABS Workout
Perform each exercise for 45 seconds, resting for 15 seconds in-between. Complete 2 full circuits for a 20 minute workout. Video below includes:
1. Flutter Kicks
2. Reaching Oblique Crunch
3. Side Plank Raises (right)
4. Side Plank Raises (left)
5. Russian Twist
6. Toe Touch Crunches
7. Leg Pulls (down)
8. Leg Pulls (up)
9. Top Taps
10. Knee Tucks
Day 7
Complete 3 rounds. Rest for up to 60 seconds in-between each circuit.
1. Side Plank – 20 (10 each side)
Rest – 10 seconds
2. Side Burpees – 10 reps (5 each side)
Rest – 30 seconds
3. Prone Plank – Hold 1 minute
No rest
4. Russian Twist – 50 reps (25 each side)
Instructional Videos
Bob Harper’s Ab Challenge (Day 1)
Bob Harper’s Set ups (Day 1)
Leg Lifts (Day 1)
Reach Through (Day 1 & 5)
10-Minute ABS (Days 2 & 6)
Routine #1 (Day 3)
Mountain Climbers
Scissors (Day 3)
Knee In & Outs (Day 3)
V-Up (Day 3)
Routine #2 (Day 3)
Toe Touch (Day 3)
Bicycle Crunch (Day 3)
Russian Twists (Day 3, 6 & 7))
Prone Plank (Day 3 & 7)
Flutter Kicks (Day 5)
Side V-Ups (Day 5)
Left & Right Side Planks (Day 7)
Side Burpees (Day 7)
Are you taking the 7 Day Ab Challenge? Share your results with us in the comment section! The time is going to pass anyway, you might as well make this week count! In order to keep progressing, train your core 3-5 times per week!
If you enjoyed this ab-sculpting routine, you may also like:
- 14-Day Blazing Abs & Core Workout
- Belly Fat Melting HIIT Workout Routine for Beginners
- 10-Minute Tabata Workout for Abs
Give us a like on Facebook and follow us on Pinterest and Instagram to be the first to hear about all of our workout challenges, fitness tips, healthy recipes, and more!







Looks easy but it’s really difficult at first go …still day 1 today and I have completed all 100 crunches ? ! Already feeling that heat and burning sensation in stomach ? Let’s c what comes next tmrw
So glad I found this workout. Within the week I could tell my abs were starting to come back, as well as a firmer booty and legs. Even my arms started to look a little more defined. All without doing any of those specific exercises. I just finished my second week and plan on continuing while adding arms, legs and butt workouts. Thanks SkinnyMS!
We’re so happy to hear that, Maddie! Please keep us updated on your progress. 🙂
Before I did this challenge my weight was 145, I’ve never been ‘overweight’ exactly, but I knew I wasn’t in tip top shape. So I changed my eating habits, cut out refined sugars and did the daily workouts. After the first week I could see my abs coming back and my weight dropped to 140. This has been awesome! I will definitely be continuing to do this and more!
Gringa, Oh WOW, that’s wonderful to hear. I’m so happy for you. Please keep us posted on your progress. 🙂
I loved this workout, just finished it yesterday. I went from 145 lb to 141 lb.
Should I continue doing this workout weekly or star the 30 day challenge?
Carmen, Congrtulations! 🙂 I would recommend starting another program at this point. The 30-day challenge would be ideal.
I am almost done with this challenge, and I must say, it works. I have lost 6 pounds already! It´s great to see results that fast. Now my abs are more toned, and i feel a lot better 🙂
Julie, YAH!!! Thank you so much for the feedback. Congratulations. 🙂
Hi. I’m a year post partum and have finally lost all the pregnancy weight due to feeding. I’m now focused on eating clean, gulping my 3 litres of water a day… Well it’s been a week and Im already feeling results. I want to get rid of the flab around my belly, which when I pinch it must be some 6cms. Is this programme suitable please or do I pick one of your other challenges? I started the first day challenge and I love it!
Congratulations! Switching to a diet of clean foods is definitely the first step. This challenge will help to strengthen the muscles in your mid-section, but it is impossible to spot-target fat. We do have quite a few resources available to help you to decrease belly fat, however. Here you go! https://skinnyms.com/?s=belly+fat
Hi
I am going to start this challenge but I just want to ask that due to some ab exercises that target obliques the waist can become thick and blocky
Will this workout make my waist thick?
I want abs but don’t want it to be blocky I want it to remain hourglass shaped
Tara, The obliques become thick if using weights.
For the purpose of this challenge, your body weight works fine for the oblique exercises. This way you be toning and tightening. 🙂
I see everyone saying “i completed my 100 crunches” Am i missing something? Im on day 1, by “100 crunches” are they referring too the first video for day 1?
Sierra, They are probably adding up the different crunches for one day. Just follow the program and you’ll be on the right track. 🙂
Will this workout help in slimming my legs, arms and to get rid of hip fat?
Lyba, We have tons of workouts that are better suited for helping to reduce body fat, on the areas you mentioned. Check out these routines:
https://skinnyms.com/category/fitness/fat-burning-fitness/
https://skinnyms.com/how-to-slim-down-thighs-6-moves/
I’m a female wrestler, on of the first two at my school, I used this to debloat after my monthly hell, and to kick it back into gear after three months of not having to make weight (the best months of the year tbh) thank you so much! I can’t wait to continue this workout plan and start your others!
That’s awesome, Cal!
hello, I want to do this workout, I am a mom of two sons, can this workout help me to flatter my stomach ???
Stay committed and it certainly should.
Hello, I am a competitive athlete with a knee injury and I would like to know how to target my love handles and belly fat without running or high intensity workouts and get rid of them as soon n as possible.
Britney, Check out this routine https://skinnyms.com/5-moves-to-lose-lower-belly-bulge/
Hello, I have a knee injury so I can’t do a lot of cardio and standing exercises but i really want to work on my love handles and belly fat FAST. What should I do?
Hi Carla, Be sure to drink plenty of water and eat a clean diet, that’s #1. Next, check out this workout https://skinnyms.com/5-moves-to-lose-lower-belly-bulge/.
I really hope this works I got to the beach in a month ??♀️
I want to start this challenge because im going to summer camp in 2 weeks but im hesitating because i have scoliosis and i don’t know if im overloding my spine… Can i still do the challenge with scoliosis?
Please check with your doctor before beginning any fitness plan. Best to you!