Sit-ups possibly banned?

I found this article on the sympatico home page this morning. It discusses the rising concern about sit-ups with the medical crowd and alternatives to performing the sit-up in a safer way. The article discusses how a regular sit-up, which is usually done on a flat surface, can cause strain on your spine and cause more damage than it produces good results. This article was found at: http://www.besthealthmag.ca/blog/post/watch-your-back-say-no-to-sit-ups