only watched part of the video- it's has a word in it that I find boring--Physics. As soon as people try to explain things using physics- I always feel that they have delved into a black art- or talking a load of cobblers.

But I do have to agree with the statement. Have done a few rides where after about 80 miles there is something giving me a lift to the end. It definitely isn't me putting the effort in to get up those last few hills- as by that time effort and energy have gone.