Intense headaches after rides

[ny biker]

re: sports drinks with less/no corn syrup, you can make your own. I found these recipes online:

Isotonic: for the average athlete. Mix 200 mL of frozen orange juice concentrate with one liter of water and a pinch of salt.

Hypotonic: for athletes with low perspiration levels, like jockeys and gymnasts. Same as above, but use 100 mL of concentrate.

Hypertonic: for athletes like long-distance runners who need extra carbohydrates and electrolytes. Same as above, but use 400 mL of frozen orange juice.

Plus the ones on this site. They're all pretty similar.

http://www.roadcycler.com/2006/08/sc...-sports-drink/

Also I have Nancy Clark's Sports Nutrition Guidebook at home so later I can check and see if she has a recipe.