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

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I do 50 sit ups, and 20-30 push ups every day before bed. Does this do anything for me or should I stop? - Quora

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Finer Form Multi-Functional Gym Bench for Full All-in-One Body Workout – Versatile Fitness Equipment for Hyper Back Extension, Roman Chair, Adjustable Situp, Decline, Flat Bench : Sports & Outdoors

Get ready! The 200 Ab Challenge starts NOW! - Blogilates

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How to Do a Butterfly Sit Ups (and Variations) for a Strong Core

I did 50 reps of this sit-ups ab exercise every day for a week — here's what happened

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