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.
If hitting the gym is your idea of torture, these classes are perfect for youâtheyâre designed to be way more fun than your typical workout. But even if youâre a fitness junkie, trampoline routines are still worth a try: Theyâre a great way to switch things up and add some novelty to your regular regimen.