Life drawing terms

I'm a model, rather than an artist, so I'm hoping someone out there can answer this question. A life drawing class will often commence with some short warm-up poses.  Now, I have no problem if an artist or a group asks for "5 two-minute poses".  But other times I'm asked for "5 two-minute dynamic poses" or "5 two-minute gesture poses"

My question: is there a difference in meaning between dynamic and gesture? Or do they mean the same thing?

Thanks in anticipation!