Verkhoshansky gives the time to maximum potentiation for the second activity at ~5 minutes.
Sorry to have to repeat myself, but I don’t fully understand the implementation of this training. If the potentiation lasts only a few to 5 minutes, won’t only the first overspeed rep receive this benefit unless you alternate the resisted and unresisted/assisted reps, rep for rep? In other words, if you do 5x50 resisted, rest a few minutes and then start the 5x20 blocks, won’t only the first 5x20 benefit from potentiation effects?
As far as definition of terms, doesn’t contrast apply when the two activities are alternated rep for rep, and complex training apply when the two activities are conducted in succession during the same training session?