Answer: Crunches target the rectus abdominis and other abdominal muscles. An ab crunch machine is designed to strengthen the abdominal muscles. Wearing compression underwear can give the stomach a more toned appearance. Ab crunches are a great exercise for people looking to shed weight
Bent-Knee Hip Raise. Major Muscle Group: Rectus abdominus This is like a reverse crunch but with a longer range of motion.
Explanation:
As mentioned, the Ab Crunch Machine mainly trains you with the straight abdominal muscle. This muscle pulls the sternum towards the pelvis, by bulbing the back. The transverse abdominal muscles help. They pull the abdominal wall backwards and stabilize the core in this way.