I did 50 butterfly sit-ups a day for a week — here's what happened to my abs

What are butterfly sit-ups, how do you do them, and what happens if you do 50 a day for a week

Fitness Experts: Sit-Ups Are Worthless, Here's What to Do Instead

Sit-ups: Techniques, benefits and variations on the classic

I did 30 sit-ups a day for a month — here's what happened

Butterfly Sit-ups by With Love, Foxy - Exercise How-to - Skimble

I Did 50 Crunches Every Day For A Month—Here's What Happened

I did weighted sit-ups every day for a week — here's what happened

What Happens To Your Body When You Do 50 Sit-ups Every Day

Fitness Experts: Sit-Ups Are Worthless, Here's What to Do Instead

Forget planks — this 6-minute bodyweight workout targets your

Sit-Ups Benefits: Exercises, Variations, and More

Best Ab Workout At Home Six Pack Abs 22 Days - ATHLEAN-X

Medium

Exercises For Abs

What are some exercises that target all of your core muscle groups at once? - Quora

I did the Leaning Camel exercise every day for a week…