90 lengths, continuous ? sounds good -
if you time individual lengths how does that evolve during swim , I normally hammer the last 20 lengths or so at a pace I could probably not sustain for all the exercise so for me about 30s a length and the previous 80 ones about 37s . Plus depending on others in the pool maybe trying to keep up or catch-up.
I never push-off with any force
this article suggests push off speed 3m/s (+50%) vs stroke 2m/s, so if I achieved same ratio and push off lasted 4m, might knock off 1.5/2s (don't know if there are watches that would record speed change)
sorry madindehead I am not disciplined enough to have a plan, my bucket list is :
bilateral, trying one of the biofuse handpaddles mentioned earlier to improve catch.