Originally Posted by
cubewheels
The best bodyweight strength training I've tried is driving big hard gears in steep climbs - while sitted and also out of the saddle in intervals.
Even VO2 has conversion of type iib to type iia fibers. And is mostly type iia. Which is best bet for what you describe.
So, what you describe is not strength training. Especially since it's going to be longer than 15 seconds. Here's a handy chart.