Some runners find that exercise brings on minor asthma attacks. Omega-3 fatty acids combat this by preventing the airways from narrowing and increasing lung volume by up to 53% according to experts. Oily fish are the best source, but kiwi fruit seeds are also rich in heart-healthy omega-3, as are avocados and flaxseeds. An Indiana University study found asthmatic runners benefitted from a dose of caffeine an hour before exercise.
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