How Much Force Does Each Start Generate?

Video Transcription: So as far as these two setups and in relation to the forces that are generated, so for a start obviously you’re going on a diagonal you’re not going straight up in a vertical force and you’re also not going straight out in horizontal, but it’s the combination of these two forces that help you jump forward. So you have to work with both of them. So the comparison between a Grab Start which are these two graphs up at the top, versus a Track Start is actually pretty interesting if we look at vertical Force first, which is Grab Start here, Track Start there. You see that they’re very different lines for a Grab Start both of them, you know kind of start out with the same amount in Peak speed. So your Peak Forces coming off the block is about the same point for a Grab and a Track. Then very quickly, you can see a Track Start’s Force just like totally depletes. Whereas I Grab Start kind of like hangs on a bit more and the reason that is, is a Grab Start – The body is lower towards the block. So you’re actually pulling the chest down for the towards the blocks. So they’re able to move their body more and use their body more as their pushing up. So going down to go up seems a little bit counterintuitive, but it’s more about the muscles that are firing in the contraction from those muscles and engaging throughout the entire body versus just engaging through the legs.

If you look at the horizontal Force for these two different start Styles, once again, you see something completely different on their charts. So Horizontal Force for a Grab Start is like this gradual incline like you’re walking up this mountain. You see 18 false Peaks and then you finally get there but it’s a huge peak value. Whereas a Track Start, there’s two smaller peaks, but it kind of hangs on for the for the duration of that jump. So interesting part about the Track Start is the Track Start comparatively to a Grab Start, actually has a lower horizontal Force peak, but it has a better average horizontal Force. It’s the horizontal force over time, is what you’re looking at and this has been a common theme that I’ve found through swimming is a lot of times coaches are very focused on what the maximum value is because we’re trying to go the fast the fastest possible. So how fast can we go? What can we peek at, but it doesn’t matter if you peek somewhere and then you’re slower for the rest of the race. So really, What we’re looking for from our Swimmers is the fastest average race for all the different Strokes. So as far as the horizontal Force is concerned, the reason it hangs on so well in a Track Start versus it Grab Start is because you have two distinct motions happening in a track start. You’ve got an arm motion, which is gonna help generate some Force and then you’ve also got the front push off or the jump which also generates Force. So the average there is better than this gradual Peak situation that happens from a Grab Start.