why do people get warm rather than cold while doing physical work?
963835
the body is not very good at changing energy into movement\n3/4 of the energy used to move muscles is turned into heat instead of moving the muscle\nthis heat is what makes you warm
815926
That is actually an interesting question.  Scientists have shown that shivering is actually a very effective means to move the body around, which in turn is a good way to generate some heat quickly.  Going for a run would do the same, but the brain sends a signal to shiver just to get your body heat up.  \n\nYou also may shiver when you are sick.  Fever is one of the body's defense mechanisms.  (It helps kill germs, although it is dangerous when it gets too high.)  So you run a fever, and one way to heat up is to send the word to shiver.\n\nGood luck!!
151751
to loosen up your muscles and get the blood flowing for my rigoris activity... makes working out easier than going into it cold and it help to avoid leg cramps and other cramps...
1058226
Lack of warming up is the problem. Also, like what we're doing when warming up is also to stretch. The whole idea is to stretch the muscles and make them flexable and to loosen up the joints and get some physical heat into them.
44447
body temperature is 98.6 F when you enter a cold environment your body has to work harder to keep it at that temperature otherwise it would drop to the temperature of the room.if the environment is sufficiently cold you body has to work so hard to keep it at 98F that it cannot keep you awake and warm at the same time.the effect is similar to feeling tired after eating a heavy meal
766632
That makes the warm up operation slower.  Slower can be better because it causes less of a strain what is being warmed up.
581383
The productive effect of your exercise has to do with the muscles and the effort they exert. Sweating is not a body-building process, it is a temperature-regulation process to dump waste heat generated by your activities.  Your central nervous system starts to break down if your internal body temperature rises above 107 or so! \n\nYour exercise program builds you up by proper use of the muscle groups in a planned manner.  The only difference in your physiology when there is AC around, is a slightly lower loss of water and of the body salts that go with sweat.  If it makes you more comfortable as you exercise, and encourages you to keep to your program, it may make for a much better training experience.
264281
In the summer. It takes a lot more energy to cool the body down, than to heat it up... Something to do with optimal temperatures for enzyme function, blah, blah, blah...
140386
Hot or cold is relative to your body temperature. Something less will feel blah, cool, or cold depending on how much less. Vice versa for hot. The 'starting point' for hot or cold can be different for each person, or even for the same person, like if you just worked out, everything will seem a little warmer for a while.
1114793
Your bodies muscles tighten and constrict to generate heat and energy
711427
It sure does.  Why do you think athletes dont freeze to death when they play in shorts and a t-shirt in the middle of winter?  More muscle means more blood flow, which means more 98.6 degree blood being sent throughout your body.  Think about this... you shiver when you are cold, which stimulates the muscles, thereby increasing blood flow to your cold areas, and making you feel warmer.
498181
We generate heat through metabolic work, even when not physically working.  \nTo avoid increasing body temperature we need to dispose of this heat.  \nThis is clearly easier when the surrounds are cooler than the body. \nIt is still  possible even when surrounding temperature is above 98deg, as long as humidity is not so high as to prevent evaporation.
626721
because the moving are increases the rate that perspiration evaporates off you skin, which makes you feel cooler.
906611
breathe into your hands. your breath warms your hands and in turn you begin breathing warm air. breathing warm air triggers the bodies machinary to beginning heating up  the body parts. of course this is only a quick fix and trick. you need to get to cover or clothing immeadiately.
1180323
warming up is essentially before exercise for many reasons. when your muscles are cold, they do not respond as quickly. "warming up" heats your muscles up, for further physical exercise. another important reason to warm up is the risk of injury. muscles that are not warmed up may be tight, stiff, and exercise puts pressure on them that could be dangerous and cause injury. Some believe stretching is very important after the warm up, but before exercise to help stretch the muscles, and warm them up to being moved. Exercise is great.. and make sure you warm up before your exercise! \n\ngood luck
392546
heat speeds up movement because molecules shrink and there is more room for movement. cold slows down molecule movement because they expand and there is less room for movement. It's basic physical science.
183132
Because your body generates enough heat to be much hotter than 98.6 degrees. When it's cooler outside, the heat just radiates out through your skin, and your body stays at 98.6 instead of going up past 100 degrees as it would if your body just let the heat it produces accumulate.\n\nWhen it's hotter outside, getting rid of the extra heat is harder to do and so you have to sweat to get rid of it. So it seems strange, but the thing to remember is that your body isn't an ice cube melting on the desktop. It's an engine that's constantly burning fuel to make energy and some of that energy is released as heat. It's more about releasing the heat that's being made than maintaining a particular temperature.