MarkkuS wrote:I'm new on this forum, but I have practised TI many years, but feel I have hit a plateau. I think also I'm a overglider and my ape index is -1,5.
I don't understand how a difference of a few inches of the arm span, compared with my length, can affect my optimal strokes per length or stroke rate much. If my arm span is few inches longer or shorter, the calculated optimal SPL (pool length/arm span) will not change much.
In the water, the slightest difference in anything makes a huge difference in the result. That's just the way things are in the water, at least for the human attempting to swim.
Size of the hand plays a role here. I am far from being an expert in human anatomy. But there's a possibility that larger hands go along with longer arms.
The thing also is that this +something or -something is calculated in relation to your body length, IOW the length of the big thing dragging you in the water. Again there, statistically speaking, possible that longer body be also slightly bigger.
So in the end, a 6f tall body having a -1.5 ape index is equivalent to arms of a 5f10.5 guy having to pull a 6f long (and big) body.
Take a 5'10 guy having an ape index of +3. It's equivalent of the arms of a 6f1 guy having to pull the body of a 5'10 guy.
Body size, hand width, lever etc all this end up having a significant impact on potential for distance per stroke.