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I guess there’s a curve to this too where the heavier you are already (ie me) the less impact 5kg has, and the faster you’re running the less time it saves? Probably working in % of weight and time makes more sense.
@Ifonlyiwerebelgian how much faster were you planning on running?!
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I guess there’s a curve to this
No doubt, but the data it is not readily available (the Daniels's tables stuff is very dated and very biased towards elite level athletes).
Any curve is is going to be s-shaped too - if you are overweight, for a given weight dropped, your gains are going to be proportionally greater than if you are just above your optimal weight. But if you start dropping more weight, your performance will also drop off (because muscle mass / other physiological factors).
I can tell you from personal experience that 6kg is worth 15 minutes but not all things were equal..
Training was focussed on running faster, and I tried a bit harder, and paced a lot better…