###Human: Which tests should I do to check adrenal gland functions? ###Assistant: Hi. All your clinical problems appear to be related to anaerobic respiration. Based on your query, my opinion is as follows: For respiration, oxygen is most important - Anaerobic respiration mainly occurs because of reduced oxygen. You might require a lung function tests to evaluate for adequate oxygenation. If you are a smoker or exposed to pollution, dust or industrial exposure, it can get affected. Anemia requires evaluation. Hope your hemoglobin level is within normal limits. Get a hemogram done. Anaerobic respiration leads on to lactic acid production. This lactic acid accumulation causes muscle pain and tiredness. Do get your lactic acid accumulation level in blood evaluated before and after the exercise. Lactic acid level requires correlation with possible muscle storage disorders or dystrophies compared to exercise; there may be increased lactic acid production. Hydration would be washing of this lactic acid, which is possibly making you feel better. Meet a biochemist to get yourself tested for lactic acid increase and possible causes. Sweat glands can produce abnormal smell depending on diet. Look into your diet closely. Citrulline produces nitric oxide leading on to vasodilatation. It could be removing some amount of lactic acid or increasing oxygenation, but overall the main cause from lungs to blood and blood to muscle requires identification. Get the tests for hemoglobin level, lung function tests along with oxygen saturation and serum lactic acid. If all are normal, then muscle glycogen storage disorders or muscle biopsy for any pathology maybe necessary.