As the article says ...
If You Lose 5 Pounds...
Say you hold 200 watts up a six-mile climb with a three-percent grade. If you weigh 180 pounds, you’d average 11.46mph. If you weigh 175 pounds, you’d go 11.65mph. At the top of the climb, you’d have saved 30 seconds. That might not seem like a lot, but if you’ve ever watched someone slowly roll away from you, you know what a difference even a few seconds can make.
On a steep pitch, things get even more pronounced.
You all will have to keep reading the article for more.
But I can tell you from experience that losing 55 lbs has
significantly improved my climbing speed and strength. And interestingly ... I enjoy my dinner too.