Hey guys, just wanted to get some opinions. I got back into riding last summer and did it for 6 months with no prob most of the time. Though I did get light headed during a couple of rides, wasn't recently but just something I remembered and wanted to prepare for before I go back out in the spring. I did about 20 miles daily, at peak 5 days a week. I do the 20 in like hour and 15 minutes. For breakfast I would have say a big bowl of cheerios. During the 20 mile, I would stop at 10 to take a break and chug like 10 ounces of water. 2-3 times I felt light headed at the 10 mile break stop. I didnt feel like I was pushing it that hard, prob 80%. Any thoughts on what might be the cause? Or maybe foods or drinks I should intake before the ride? I am 5'8 and 140lbs, 5-10lbs less than my normal weight when I wasn't as active. Any info would appreciated, thanks!