Whether you sweat droplets or buckets is determined by how many sweat glands you have, how many are activated when you run, how much sweat your glands produce, and how rapidly you begin sweating. All of this, in turn, is determined by your gender, genetics, anatomy, physiology, fitness level, and above all, body temperature – the warmer you get, the sweatier you get, because perspiration is your natural cooling system. That’s why you sweat more if it’s hot and humid, when you have a fever, after you eat spicy foods, or yes, if you’re running. And the harder you run, the higher your temperature rises and the more you perspire. But don’t fret about sweat unless it’s excessive or disproportionate in some parts of your body. That may be a…