With any boot camp or resistance based exercise programing variety is important. However, so is stability and comfort. Participants need to have a few base exercises that they can just shut off and do, as well as track progress by. There is a trap in constantly changing exercises in that it can be fancy for the sake of fancy and lose an element of functionality as well as being user friendly. Small modifications and order and circuit style go a long way to creating fresh routines.
Don’t get stale, but don’t get too fancy.
And remember, just because you’ve done certain exercises a million times doesn’t mean they have or that they’re bored of them.
Hope this helps,