Athletic mastery depends on understanding official gameplay rules, optimizing equipment technology, and implementing sport-specific conditioning drills.
Blisters generally occur when an object moves across the skin in a manner that creates friction. On the hands, baseball bats and other handheld sports equipment cause blisters when they rub against delicate skin on the fingers and palm, causing the top layer of skin to separate from a lower layer.
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A burst or perforated eardrum may occur following an infection, injury or explosion and can cause temporary hearing loss, nausea and discharge. Most perforations heal in two to three weeks without treatment, but some may linger for longer periods or require surgical correction.
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