I've been going to body balance classes at the gym for months now and can do a session without too much trouble (i.e. Don't break a sweat, no sore
Muscles, more a nice stretch than a challenging workout really).
I'm hoping to start toning my body more now - especially upper arms! - so have signed up to Body Pump class this Wednesday. But feeling a bit worried about it to be honest. It's just really far from my confort zone of low impact, yoga typed exercise. But yoga just isn't shifting the flab fast enough, so here I am! 
Can anyone offer reassurance that I'm not going to be way out of my league?! Is it manageable for someone who has a relatively low level of strength? Also I sprained my ankle a few weeks ago - it's more or less healed but still weak, if you see what I mean? Does BP involve much jumping around?
Hope someone here can offer some experience! I am really motivated to try something new but for some reason body pump just looks so advanced when I'm seeing classes through the little window at the gym!