How to Trim Your Waistline in Just 21 Days

What’s keeping you from achieving that sexy, slender waist of your dreams?

A Must-Try 21-Day Trim Your Waist Challenge

What’s keeping you from achieving that sexy, slender waist of your dreams? Nothing! If your waistline regularly brings you insecurities or keeps you from wearing the clothes you love, you can do something about it! A trim and toned waist will give you that confidence boost to flaunt any outfit while adding extra appeal to your natural curves. This challenge will show you how to trim your waistline in just three weeks. We’ll guide you through all the right exercises and diet tips that’ll shave inches off of your waist in under a month, ultimately helping you feel happier and healthier in your own skin!

How to Trim Your Waistline, a 2-Part Challenge

The first part of this 21-day challenge covers your menu. Diet plays a huge role in helping you shed those pesky pounds around your midsection!

As part of this challenge, you will follow and prep for the 21-Day Flat Belly Meal Plan. You need to eat clean, snack smart, and stay consistent in order to get the best results. You’ll have three full meals a day and a snack from our list of 25 Best Flat Belly Snacks to keep you energized and satiated in between meals.

Additional Food/Drink Tips:

1. Instead of carbonated drinks, try 12 Clean Drinks Better than Soda
2. Instead of sugary snacks, try 5 Sweet But Clean Snacks For When You Want To Indulge
3. Increase your hydration and detox with 5 Simple Detox Water Recipes to Boost Metabolism

The second part of this plan is the routine. Since your abs are broken up into three major sections (upper, lower, and obliques), this routine isolates these sections and gives them separate attention. We oftentimes leave obliques in the dust when it comes to ab exercises, but this routine makes sure to give this critical area some much-needed attention! Exercises are divided based on the area being targeted. This allows certain muscle regions to rest, recharge, and repair themselves while you work on developing other areas.

This waist-trimming routine allows for two rest days while including one full cardio day and one full ab workout day. Cardio is essential to torching calories and trimming any excess fat from your body, while the full ab day will challenge your entire midsection to work through the discomfort that brings results.

How to Trim Your Waistline in 21 Days: The Challenge

All exercises should be performed at a fast pace (except when noted) to get mutual muscle-building and fat-burning benefits. We also recommend that you work out early in the morning to boost your metabolism early on and have it running for the entire day.

What you need: a yoga mat or soft surface and an interval timer (free interval apps are available on your phone)

What to do: Follow the instructions designated for your fitness level.

Beginner Challenge: Perform each exercise for 30 seconds, complete 4 rounds, and rest 30 seconds after each round.

Intermediate Challenge: Perform each exercise for 45 seconds, complete 4 rounds, and rest 30 seconds after each round.

Advanced Challenge: Perform each exercise for 45 seconds, complete 5 rounds, and rest 15 seconds after each round.

Get your free 21-Day calendar and never miss a workout!

21-day trim your waist challenge

21-Day Trim Your Waist Challenge

Days 1, 8, and 15 – Upper Abs/Obliques

1. Alternating Toe Touch
2. Russian Twists
3. Toe Touch
4. Crossover Running Plank

Days 2, 9, and 16 – Lower Abs/Obliques

1. Toe Tap
2. Reverse Crunch
3. Crossover Running Plank
4. Slow Bicycle

Days 3, 10, and 17 – Rest

Days 4, 11, and 18 – Obliques

1. Russian Twists
2. Slow Bicycle
3. Crossover Running Plank
4. Hip Dip Planks

Days 5, 12, and 19 – Cardio

1. Fast Bicycle
2. X Jump
3. Mountain Climbers
4. Burpees

Days 6, 13, and 20 – Total Abs

1. Reverse Crunch
2. Crossover Running Plank
3. Alternating Toe Touch
4. Hip Dip Planks

Days 7, 14, and 21 – Rest

Instructional Videos

These videos will teach you all the moves you need to know to trim your waistline and complete our 21-day challenge.

Alternating Toe Touch

Russian Twists

Toe Touch

Crossover Running Plank

Toe Tap

Reverse Crunch


Hip Dip Planks

X Jump

Mountain Climbers


Now that you know how to trim your waistline in less than a month, make sure that you subscribe to our newsletter so that you don’t miss out on all things SkinnyMs.

If you enjoyed learning how to trim your waistline, you may also like:

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Trainer Clifford

Clifford is a NASM Certified Personal Trainer and a lover of all things health, fitness, personal development, and community. When he's not cycling, hiking, or exploring new food recipes, he works to help others achieve personal growth.

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  1. I tried to download both this calendar and the 21-Day Tone Your Body Challenge and the page to add to card and view cart would not load. Is there another way to download the calendars?

    1. Kathleen, I did a test and it is now working. Please try again. Let us know if your pages still doesn’t load. 🙂

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