why does temperature affect heart rate
Best Answer: In heat gain, heart rate increases as the result of changes in the core body temperature. Dressing appropriately is the most important consideration to maintain the bodies core temperature. Dehydration causes heart rate to increase.In heat loss, heart rate decreases as adjustments result in improved exercise capacity to heat exposure but minimally to cold stress. This generally takes about 10 days.Shivering can increase the heart rate significantly to increase core temperature.eport Abuse. Unless the temperature is so hot or so cold that it is shocking or painful, temperature really doesn't affect your heart rate directly Oxygen content in the air is affected by temperature sometimes. For example, room temperature atmosphere usually holds 22% oxygen.