Marble refers to metamorphic or sedimentary carbonate rocks, the main chemical composition is calcium carbonate, accounting for more than 50%, as well as magnesium carbonate, calcium oxide, manganese oxide and secondary silicon dioxide. Marble belongs to medium hard stone.
The color of marble is related to its composition. White contains calcium carbonate and magnesium carbonate, purple contains manganese, black contains carbon or asphaltene, green contains diamond, yellow contains chromium, reddish brown, purple and brown contains manganese and iron oxide hydrate, and various colors contain impurities with different compositions. Pure white marble has simple components, but most marble is a mixture of two or more components.
The common marble fitness ball is not pure white and has few impurities, so there is no radiation.
Rubbing and rotating the fitness ball with your fingers often is not only harmless to human body, but also has many benefits:
1. Fitness ball makes fingers, palms and wrists flex and stretch flexibly through the movement of fingers and palms, promotes the movement of upper limb muscles such as fingers, wrists and elbows, and prevents and corrects symptoms such as numbness, trembling and decreased grip strength of upper limbs caused by degenerative diseases of the elderly.
2. The fitness ball stimulates the second and third metacarpal bones of the palm, which is conducive to regulating the function of the central nervous system, achieving the effects of calming the nerves, strengthening the brain and improving intelligence, thus enhancing the physiological functions of internal organs and exerting the physiological effect of "moving is not bad".
It is an indisputable fact that hand exercise is good for the brain. When people play fitness ball, they can concentrate their thoughts on their hands, eliminate all kinds of distractions, eliminate tension and relax their brains. When playing fitness ball, the ball rotates regularly and makes a soft sound, just like sweet "music", which will undoubtedly balance the excitement and inhibition of brain nerves and relax appropriately. Moreover, hand movements can make the blood supply to the brain more adequate. Therefore, playing fitness balls regularly can effectively protect the brain, slow down brain aging and avoid the occurrence of Alzheimer's disease.