How about increasing the weight, then doing 1 or 2 sets of 3 reps? Three sets is a lot; the impression I get from reading around is that unless you are a SRS ATHLETE, 3 sets is plenty. Fewer reps, more weight would at least change things up, and might help with strength.
Are there any cardio-type things you can do that would work better for interval training? Bicycle, swimming, etc.?
Re: (disclaimer: I am not an expert nor do I play one on the intrawebs)
Are there any cardio-type things you can do that would work better for interval training? Bicycle, swimming, etc.?