After three decades of ?guring how out the spine works, Stuart McGill has come to loathe sit-ups. It doesnt matter whether they are the full sit-ups beloved by military trainers or the crunch versions so ubiquitous in gyms. What happens when you perform a sit-up? he asks. The spine is ?exed into the position at which it damages sooner.
Interesting points. The comments on the article go both ways.