Individuals with known positive sickle cell trait status experiencing significant muscle weakness or fatigue during exercise should take extra time to recover and hydrate before returning to activity in order to prevent further symptoms.A collapse can be prevented by taking steps to ensure sufficient oxygen levels in the blood. Among these preventative measures are proper hydration and gradual acclimation to conditions such as heat, humidity, and decreased air pressure due to higher altitude. Gradual progression of exertion levels also helps athletes bodies adjust and compensate, gaining fitness slowly over the course of several weeks. See also
Ryan Clark (American football)

References


== External links ==
Acroosteolysis is resorption of the distal bony phalanges. Acroosteolysis has two patterns of resorption in adults:  diffuse and bandlike. The diffuse pattern of resorption has a widely diverse differential diagnosis which includes:  pyknodysostosis, collagen vascular disease and vasculitis, Raynauds neuropathy, trauma, epidermolysis bullosa, psoriasis, frostbite, sarcoidosis, hypertrophic osteoarthropathy, acromegaly, and advanced leprosy.The bandlike pattern of resorption may be seen with polyvinyl chloride exposure and Hadju-Cheney syndrome.A mnemonic commonly used for acro-osteolysis is PINCHFO.Pyknodysostosis, Psoriasis,
Injury (thermal burn, frostbite),
Neuropathy (diabetes),
Collagen vascular disease (scleroderma, Raynauds),
Hyperparathyroidism,
Familial (Hadju-Cheney, progeria), 
Occupational (polyvinyl exposure),
Acroosteolysis may be associated with minimal skin changes or with ischemic skin lesions that may result in digital necrosis. : 665

See also
Nail anatomy


== References ==