The number of calories you burn when exercising depends on how much you weigh- the heavier you are, the more calories you will burn because of the extra effort required to move. The information below shows how much energy is used by a range of different exercises. It is based on someone who weighs nine and a half stone, so the calories will be higher if you're heavier and lower if you're lighter. However, regardless of your weight, running is always going to be the most effective exercise for shedding the pounds. Also, as you convert fat to muscle, you'll be using up more and more calories just going about your daily business. Calories burned will also vary depending on the intensity with which you exercise- especially with activities such as yoga, aerobics, and dance, which can vary from high to low impact.
Exercise Approximate Calories Burned
Running 800 cals per hour
Jogging 500 cals per hour
Walking 250 cals per hour
Tennis 650 cals per hour
Cycling 500 cals per hour
Dancing 350- 400 cals per hour
Gardening 300 cals per hour
Cleaning 300 cals per hour
Aerobics 600 cals per hour
Fast-paced yoga 500 cals per hour
Pilates 300 cals per hour
Treadmill 600 cals per hour
Cross- trainer 550 cals per hour
Rower 550 cals per hour
Bike 450 cals per hour
Stepper 550 cals per hour
Swimming 500 cals per hour
Source: SHE April 2006