SCUBASAFETY
Working underwater requires a clear head and a healthy body
Alcohol, smoking and fitness
Good nutrition is only one aspect of a healthy lifestyle. Alcohol consumption and smoking may have a much greater impact on diving fitness than any individual food or supplement.
Alcohol impairs judgement, coordination and reaction time, all of which are critical for diving safety. It may also contribute to dehydration and potentially worsen the effects of nitrogen narcosis. For these reasons, alcohol should be avoided before diving and consumed only in moderation once diving activities have finished for the day.
Smoking also has significant implications for diving fitness. It damages the lungs, increases cardiovascular strain and reduces overall exercise tolerance. Since safe diving depends heavily on healthy respiratory and cardiovascular systems, smoking is particularly undesirable for divers.
While vaping is generally regarded as less harmful than smoking, it is not risk-free and its long-term effects remain uncertain.
Divers seeking to improve their safety and fitness to dive are likely to gain more benefit from stopping smoking
and moderating alcohol intake than from any specific supplement or nutritional intervention.
Conclusion
Nutrition is an important component of overall diving fitness, but it should be viewed as part of a wider approach to health and safety. Current evidence suggests that maintaining good hydration, consuming adequate energy and following a balanced diet may help support performance, recovery and physiological resilience during diving.
Emerging research into antioxidants, endothelial function and dietary patterns is promising, but many findings remain preliminary and should not be overstated.
Perhaps the most important message is that there is no magic food, supplement or dietary strategy that can make diving riskfree. The best-supported approach remains surprisingly simple: eat well, stay hydrated, exercise regularly, avoid smoking, limit alcohol and follow established safe diving practices. These habits are likely to improve not only diving fitness but longterm health as well. �
Practical recommendations
Current evidence supports several simple and practical recommendations:
■ Eat a balanced diet based on whole foods
■ Consume enough energy to match your activity level
■ Stay normally hydrated before and after diving
■ Avoid excessive fluid loading immediately before dives
■ Aim for pale yellow urine as a simple indicator of hydration
■ Include plenty of fruit and vegetables in your diet
■ Avoid alcohol before diving and consume it moderately afterwards
■ Avoid smoking and seek support to quit if necessary
■ Maintain good cardiovascular fitness through regular exercise.
■ Continue to follow established diving safety procedures, including conservative dive planning and appropriate ascent rates.
Our AI-generated divers enjoy the fruits of a Mediterranean diet
The author enjoys a tropical dive
44