Humans have a large skin surface area. In fact, if all the skin cells of the body were lined up next to each other they would reach around the circumference of the planet. No wonder we spend so much on skincare. Add to this the fact that the surface of the skin is largely bald, and you have one very large, flat heat exchange area that is brilliantly adapted to losing heat quickly, although it can be restricted by beauty products on the skin. Dogs do not have sweat glands the same as us and even if they did they would not lose heat efficiently from the skin surface as it is covered in hair. This is why they choose to loose heat from the most flat and large exposed area of skin, which is the tongue.

When a human sweats and heat is taken away from the surface of the skin, this process is know as evaporation. Now liquid evaporates all the time from loads of places. mud, grass, the ocean…They all evaporate at one rate or another, but what also happens is that as the water gets taken up into the air, heat goes with it. This is because turning water into a gas requires energy. The heat is needed to turn the liqued into a gas and this heat is taken from the skin surface whent sweat is lying on top. up to 75% of the body is made of water and therefore we have a great deal of it to use. This is why sweating is mostly our chosen method of heat loss but as you can imagine causes problems when our resources are depleted as all our organs also need water to function. Although a fast and effective way to lose heat, humans struggle to survive in extremely hot and dry places, and this why sweating is not an option for desert animals.

What is a strapless heart monitor?
Unlike standard wireless heart rate monitor, a strapless heart rate monitor does not come with a chest strap. Instead it has an area on the main unit that measures the heart rate. If youre using strapless heart rate watch then the watch represents the main unit. You simply place two fingers over the measuring area of the watch and after approximately 5 seconds you receive your heart rate reading.

Is a strapless heart rate watch better than  the heart rate watch with the chest strap?
As soon as you use quality, branded product, there is no actual difference in the accuracy of measurement, no matter if the heart rate is measured with strapless or banded heart monitor watch. The strapless heart monitor watches are more comfortable as you wear no strap.

How to measure the heart rate?
Measuring your heart rate will be more accurate if done daily, at the same time during a day and in resting position, after not doing anything for at least 10 minutes (even standing up from the chair is considered an activity and increases the heart rate). Measurement should be done using a quality heart rate monitor that was tested for accuracy by manufacturer. It is advised to record the measurements so that you and your physician see the development.

What is a pulse monitor? Is it the same as heart rate monitor?
No they are not the same. While heart rate monitor functions the same way as your physicians ECG (ElectroCardioGram) monitoring the electrical impulses of your heart . On the other hand a pulse monitor detects blood flow in extremities. Pulse monitor is unable to detect beats that do not produce enough blood or other abnormalities and therefor is less accurate and should not be used for medical purposes.

Is heart rate monitor mandatory for exercise?
No i tis not, but it is advisable. Training at your own convenient pace usually is not the most effective. To maximize the benefits of exercise you need to stay within your target heart rate range as long as possible.
The target heart rate range of a semitrained individual is 60% – 80% of his/her maximum heart rate. For beginners or people in cardiac rehabilitation an optimum target heart rate is 50-60%.

What is a pulse oximeter? Does it measure the heart rate?
Pulse oximeters are medical equipment using noninvasive methods to monitor individual’s oxygen saturation levels. People who never used a pulse oximeter sometimes assume that there is some needle hidden in it that punctures skin and oximeter then analyzes the blood drops but that is not true.
Pulse oximeters use light wavelengths to measure oxyhemoglobin saturation, delivery of oxygen to the cells but not the actual amount of oxygen. Individual normal range for the pulse oximeter display  should be defined by your physician but usually is over 95% .
Factors like anemia, low blood pressure, blood ph, Pco2 or body temperature can affect pulse oximeter reads.
And, yes, pulse oximeter also measure the heart rate.