Explanation:
I guess Muscle strength and endurance then there is Cardiovascular Endurance that can help. Flexibility not so much. Body composition helps very much.
Answer:
My final answer would be Body Composition. Nothing else matters that much. In order to swim you need to use to use your body.
Alcohol can affect all of those pertaining to your body system if long overuse of alcohol but mostly I believe it will really affect your digestive system
I think Hypothesis, Experiment, and Conclusion
Options? Can't answer this sorry haha