No Energy, No Excuses — You Can Do These On-the-Mat Ab Circuits Without Even Standing Up

Blogilates' Cassey Ho came through with this no-impact ab workout. The eagle crunches are next-level intense; I had to stop twice!

Boho Beautiful concocted this ab workout as part of a two-week challenge, but you can definitely complete it on its own. Your core will love and hate you for it, trust me; the Pilates 100s sequence will challenge even the strongest lower abs.

It's called "Extreme Abs" for a reason — this workout is led by two Cirque du Soleil performers who are also NASM-certified personal trainers. Scared yet? It's seven minutes of nonstop burn, especially in your lower abs.

"This workout was made with so much love, you are going to feel it in your bones!" We love the attitude Koboko Fitness takes into her workouts, and it's that positive energy that'll get you through this ab circuit. Moves like knees-down side plank and modified mountain climbers make it a good choice for beginners.

Rebecca Louise's upbeat attitude is infectious, and you'll need all the motivation she can give you for this 10-minute workout. Each exercise is more challenging than the last, beginning with a dead bug progression that'll get your core burning before the first four minutes are up.

This 10-minute workout might be no-impact, but it's so fast-paced that you're guaranteed to work up a sweat. You do 30 seconds of each exercise with no breaks!

This guided workout from Fitness Blender features good technique and explanations for each move while hitting all the areas of your core, including your back and obliques.