I've started riding again after 10 years and 120lbs. I weigh 300lbs right now, though a lot of that is still in my legs, and I've recently quit smoking. I've been riding a bit lately, trying to get at least two miles everyday with the highpoint being 14 miles last Friday. I've been eating less and more nutritiously than I have been the last few years also and drink only water and 'organic' teas & juices now. No more soda.
Yesterday(Sunday) I went for a quick 4 mile roundtrip and it felt like I bonked really early and had to fight for every revolution, even downhill. I didn't ride Saturday at all due to horrid weather and ate well Saturday evening and Sunday morning. I had plenty of water and actually emptied my big 24oz bottle inside the first two miles.
I know I have a loooooong ways to go, but I ride 14 miles Friday with hardly an ache, and now I über-bonk on a quick 4 mile spin? What am I doing wrong?