I bought a can of this stuff yesterday, but after reading about its effects online, am reluctant to use it and attempt to run before getting expert opinions... I see that you are only supposed to take half the can. I am 5'3", 110lbs... wondering if I should just have 1/4 to 1/3 of the can, or skip it altogether? I'd hate to get out there and have my HR over 200!!
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