Maintaining a superior level of fitness comes down to consuming everything in moderation—especially alcohol. What serious athlete do you know shotguns beers or throws back shots on a regular basis? Alcohol inhibits your physical fitness in a number of ways. Too much booze slows muscle recovery, impairs motor skills, and decreases strength and sprint performance. It’s also a diuretic, so it dehydrates you. Research published in ACSM’s Health & Fitness Journal also found alcohol depresses the immune system and slows the body’s ability to heal, which could increase your risk of illness and injury.