This post on calisthenics provides 10 common calisthenic exercises, which everyone can perform.
Abs roller wheel is a bodybuilding equipment used to strengthen abdominal muscles and improve flexibility.It makes your abdominal muscle core go through a full range of motion, causing your spine to both stretch and contract thus making them stronger and preventing your back from arching.Get perfect abs with ab roller
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Ab Wheel Exercises and Benefits to strengthen your core – Joyfit
Dual Sided Exercise Gliding Discs/Core Sliders – Joyfit