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Yes, the role of kick propulsion is an interesting one and definitely enters into this. Kick is a more continuous form of propulsion which helps maintain speed through any gap between strokes. The thing about a strong kick is that it can't be sustained over longer distances, which hints at the relationship we get between race distance and the gap between strokes. Three types of swimmer then:

1) Sprinters have to work very hard on the water and generate maximum power at a high stroke rate. They use a strong kick obviously but they can't afford to have any gap between strokes to keep the power output as high as possible.

2) Middle distance (200/400m) swimmers such as Ian Thorpe can still sustain a strong kick over this distance but are not looking for maximum power from the arm stroke. The strong kick allows them to use a slightly longer gap between strokes (only slightly) as it helps push them through the gap between strokes. These middle distance athletes tend to have the longest gaps between strokes of all, normally 0.2 seconds. Michael Phelps over 200m is another example of a 0.2 second gap.

3) Distance and marathon swimmers (800+m) cannot sustain a strong kick for long distances and so they reduce the gap between strokes again. This depends a little on individual preference, but we see gaps between -0.1 and 0.1 second.

So yes, using a very powerful kick (these guys can kick 100m with a board in 65-70 seconds) you can use a slightly longer gap between strokes, but only 0.2 seconds which feels very continuous from one stroke to the next when you do it - you can't perceive any glide being in place.