"Alcohol reduces blood flow to the muscles, including the heart, causing muscle weakness and deterioration. One outcome is cardiomyopathy (sluggish heart) which is common in alcoholics. Another outcome, arrhythmia (irregular heartbeat), or "holiday heart,"is often treated in emergency wards after several days of party drinking. Muscle aches are a common symptom of excessive-drinking "hangovers." "
Biological Effects of Alcohol Use, Michaele Dunlap, Psy.D
Decades ago it was recognized that alcohol per se is a testicular toxin, with low testosterone levels in alcoholic men, and that alcohol intake may cause a transient acute decrease in blood testosterone levels in healthy nonalcoholic men.
Alcohol and testosterone