賽跑前不適宜吃糖

Yes. Here is an article about "race day refreshments",

http://students.washington.edu/crowther/RBC/raceday.html

in which,

"... snacking in the 30- to 60-minute time window could cause hypoglycemia (a drop in blood sugar) during exercise and potentially hinder performance."

About a cup of coffee before the race,

"caffeine gives a boost to male endurance athletes, though studies on women are lacking."

But,

"those who use it should take care to keep themselves well-hydrated."

I think this is a good article. Hope someone can give a translation.

上面實驗是請受試者喝下大量葡萄糖溶液, 然後在不同時間後測定血液中胰島素濃度與血糖值, 結果發現大量糖下肚, 血糖值會立即升高, 但身體也隨之分泌胰島素, 使血糖值隨後迅速下降, 降得比沒有食用糖的情況下還低, 因此建議比賽前最好不要吃糖果等食物

我個人也是習慣比賽前要補充食物的話, 至少在跑前2-3小時吃易消化的麵包等, 不會吃糖果與巧克力, 我也有看過有人在比賽前吃巧克力, 比賽結果也跑得比我快, 因此若問賽前可以吃牛奶糖嗎?我是比較持反對看法, 或者甲蟲兄可以利用練習或者不重要的路跑賽以自己作試驗看看