I did a GHD sit-up every day for a week — here's what happened to my abs

What is a GHD sit-up, how do you do a GHD sit-up, and what happens if you do them every day for a week?

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How to do GHD Sit-Ups on the Glute Ham Developer That Will Maximize Ab Strength

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CrossFit CrossFit Workout of the Day: 231018

I did 50 plank reaches every day for a week — here's…

IFBB Pro League Physique Superstar Ryan Terry's Six-Pack Workout - Muscle & Fitness