Received 5 March 2011, Accepted 24 March 2011, Available online 23 June 2011. Spontaneous pneumomediastinum is defined as free air within the mediastinum, not associated with trauma. Causes include exercise, drugs, asthma, vomiting, difficult labour and Valsalva maneuvers. Itâs a rare, usually benign and self-limited condition, more prevalent in young males.
A youth bouncing on a trampoline. A trampoline is a device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs. People bounce on trampolines for recreational and competitive purposes.
When compared to other forms of exercises, such as swimming and jogging, the trampoline is proven to burn more calories in the same amount of time. Hereâs a chart that shows how many calories a 150-pound person burns when they jog for 12 minutes as compared to how much they burn rebounding for 12 minutes: Children already know how much fun a trampoline is, but they donât think about it as exercise equipment. Still, they are sweating, breathless and smiling.