Originally Posted by CloudsMystique
It's extremely hard on their front legs, and it makes them very unbalanced while they're bowing. They can easily strain the muscles or tendons in their front legs or shoulders, or even fall over.
Interested to learn what you've seen/read to make you think that? Not saying you're wrong, just never heard that before. I wouldn't call it a bow, but have been taught it as a good stretch by an equine bodyworker I've used.
As for strained tendons & ligs, any stretching, *if it's forced* can be bad, but if not, the horse will go only as far/as long as it can without pain & improve gradually with regular stretching, same as ourselves. Also if you're really concerned about body damage & that's you in your avatar, I'd reconsider sliding stops & the likes too.