🫁 Total Lung Capacity (TLC) is about 6L in healthy adults and varies by age, gender, body type, and ethnicity. Aging and conditions like COPD, obesity, or a sedentary lifestyle can reduce lung function. Keep lungs healthy by quitting smoking, eating antioxidant-rich foods, exercising, and purifying your indoor air. Try the Wim Hof Breathing Method for better focus—just practice safely and gently. Learn more at wimhofmethod.com.