Therefore, keen attention must be paid to symptoms related to overtraining, modifying your aerobic capacity according to your physical state. Low intensity aerobic activities are better for fat burning than high intensity exercise. However, it is misguided to believe that the selective use of fat for fuel will translate into burning more total fat calories. High-intensity exercise burns more fat calories on an absolute basis than lower intensity activities. In final analysis, if fat burning is your aim, performing cardiovascular exercise at a high level of intensity is your best choice.
Sweat is a good indicator of exercise intensity .
While sweat is usually associated with rigorous exercise, it is by no means essential to achieving results. When you exercise, sweat is brought on by an elevation of body temperature from metabolic heat. Your body regulates its temperature by activating your sweat glands, which then releases water through your pores as a cooling mechanism. Thus, sweat is an indicator that your body temperature is rising, not necessarily that you are exercising at an intense level. Thus, rather than judging your workout by how much you sweat, you should use barometers such as maximal heart rate or maximal oxygen consumption as a yardstick of how hard you are working.