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.
It also tones your quads, glutes, and calf muscles. 1. Stand on the mini trampoline with your feet about 6 inches apart. 2. Bend your arms, keeping your elbows at your sides. 3. With a slight bend in your knees, lightly bounce up and down. Your feet should come about 6 inches off the trampoline.