I know, who’s got the time to do sit-ups? Nice photo of a paraglider at the link.
“Peggy Williams, 47, fell on to a rocky outcrop after a freak gust of wind caught the fabric wing of her paraglider. She was catapulted through the air like a "rag doll" before plummeting 20ft and landing on her stomach.
But experts said her life was saved by her high level of fitness, which meant her stomach muscles acted as a "girdle" to protect her other vital organs.”