It is a bit of a thing in the trail community, the post run beer. But is your alcohol consumption, albeit moderate, having an effect on your running performance? In an article by Trail Runner Magazine they pose the question, if you are training hard and your metabolism is revving, can you consume more alcohol before it affects you negatively? How much can you drink before your training might suffer?
The answer is not a simple one, but a combination of sleep disturbance, weight gain, a poor bodily response to injury, delayed recovery and liver strain adds up to a few good reasons to cut back, or cut it out completely.