endorphins are usually released after running and aerobic exercise. for this i would say true
By substances, you mean those drugs taken by athletes. These drugs are performance enhancing drugs<span>, including anabolic steroids, stimulants, human growth hormone and diuretics. Anabolic stereoids help build muscle mass, Stimulants increase alertness and decrease appetite. Human Growth Hormone is taken to improve endurance and strength. Diuretics are banned because they tend to cover other drugs in urine test, and they cause rapid weight loss.
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In order to determine if you are using the proper amount of sanitizer in a solution, it is best to check it with the use of test strips or with concentration techniques that will help you in determining if you have the proper amount. It is also best to change if often in order to have the best result and correct or reliable amount.
