Because while running the cells start to respire rapidly which increases the metabolic activities and hence the temperature of the body rises.
because at that time you are using a lot of energy
so that he or she can keep their body warm...
A warm boot.
Yo have a boken termostat or yours has ben removed
When you run, your body releases heat making you feel warm, but actually you're getting colder.
Make sure you have proper running shoes and warm up before you run. While running - don't over-exert yourself! A great website to check out is: http://www.symptomfind.com/healthy-living/foot-pain-after-running/
Yes, most of your calorific output is used just keeping your body warm.
To maintain physical health and prevent injury while running multiple days in a row, it is important to gradually increase mileage, wear proper footwear, warm up before running, cool down after running, stretch regularly, stay hydrated, listen to your body for signs of fatigue or pain, and incorporate rest days into your routine.
Muscle contraction can be either voluntary or involuntary and is a method the human body uses to move, stretch, and even keep warm. Muscles contract while you are walking, running, and even exercising.
Skinsuits protect the body while running by enhancing muscle support and reducing muscle vibration. They also protect from UV rays and prevent scratches and abrasions.
It's will be body temperature, which is typically 98.6°F; if the person is running a fever, then the urine will still be the temperature of the body.
A running shirt might be a great idea. Many are made with special material to help wick moisture away from the body, while allowing cool air to pass through. Others designed for cold weather aim to keep you dry and warm