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Two people in a gym using BOSU balls. A BOSU Balance Trainer (or BOSU ball) is a fitness training device, invented in 1999 by David Weck. [1] It consists of an inflated rubber hemisphere attached to a rigid platform. The device is often used for balance training. When the dome side faces up, the BOSU ball provides an unstable surface while the ...
A stress ball in the shape of a globe. A stress ball or hand exercise ball is a malleable toy, usually not more than 7 centimetres (2.8 in) in diameter. It is squeezed in the hand and manipulated by the fingers, ostensibly to relieve stress and muscle tension or to exercise the muscles of the hand. Despite the name, many stress balls are not ...
An exercise ball is a ball constructed of soft elastic, typically in 5 diameters of 10 cm increments, from 35 to 85 cm (14 to 33 in), and filled with air. The air pressure is changed by removing a valve stem and either filling with air or letting the ball deflate.
Shop Amazon Prime Day exercise bike deals, vetted by a fitness editor. Take up to 57% off a new exercise or recumbent bike and start up your home gym.
An average user should be able to start with a 45 mm (1.8 in) ball and move up to 60 mm (2.4 in) as their muscles get accustomed to the exercise. Larger Baoding balls between 70 mm and 100 mm (2.8 in to 3.9 in) can be used. Keeping larger balls separate while rotating them is an advanced skill.
A rupture disc (burst) Pressure-effect acting at a rupture disc A rupture disc, also known as a pressure safety disc, burst disc, bursting disc, or burst diaphragm, is a non-reclosing pressure relief safety device that, in most uses, protects a pressure vessel, equipment or system from overpressurization or potentially damaging vacuum conditions.