When I was in my 30s, I mixed different strength qualities in single work outs with great results. Now I'm in my 40s and higher rep ranges hardly budge my results at all.
So in my 30s my workouts would look something like these three versions:
Clean and press (explosive), dead lift (low reps), an upper body exercise, and then a more isolated leg movement (high reps)
squat supersets: 315, 225, jumping, rest, repeat
Heavy squat sets, heavy bench sets, heavy rows sets, repeat at medium weight, repeat at a light weight.
The latter two strategies are variations upon articles I read in T-nation, which is why they probably sound familiar.