Stability balls, also known also as exercise balls, balance balls, Swiss balls, or fitness balls, gymnastic ball, physio ball, pilates ball, Pezzi ball, Swedish ball, therapy ball, or yoga ball, are not just space consuming bouncy toys.
It is usually constructed of soft elastic material, with a diameter of approximately 35 to 85 centimeters (14 to 34 inches) and filled with air. The air pressure is regulated by alternately either filling with air or letting the ball deflate.
They’re a great way to improve strength, balance and cardio endurance, and balance.
Basic moves like push-ups, squats, and planks are rendered a new dimension when done on an unstable surface. Stability balls are also great for post recovery training because they can reduce muscle and spinal strain during movements .
The primary benefit of exercising with a stability ball vs a hard flat surface is that the body responds to the instability of the ball and works to remain balanced, by engaging many more muscles. Those muscles become stronger over time to keep balance. The focus of stability ball exercise routines are the core body muscles- the ab and back muscles.