I was doing bodyshots in a class recently - fair enough it's a kickboxing class and not a competitive gym so i'm not always sure of the applicability of what we do to actual sparring but I still was left with a question.

We were doing bodyshots on the bag and I was told to straighten up more -

Now I couldn't see myself - perhaps i was hunching but i think he was saying to stand up straight with my knees not so bent - I would've thought you have to get your weight lower by bending your knees.

Also when straightening up and throwing multiple shots to the body i felt i like had practically no guard at all and my head felt very exposed. Is it really just a bad idea to throw multiple body shots - or is there a way of doing that quickly while maintaining a good guard? We were not moving around the bag which may have helped but i still think there must be more to it.

Suggestions? Thoughts?