Why should I exercise?
In the normal course of our everyday lives our bodies use oxygen to convert nutrients from our food intake into energy for muscle movement and body functions.
The amount of energy used is measured in calories. Broadly speaking if we burn more calories than we consume then our body will require additional fuel and will use calories stored as fat. This will lead to a reduced ratio of fat to lean muscle tissue in our body composition and a leaner, fitter appearance.
As we exercise, our heart rate has to increase in order to deliver sufficient oxygen to the working muscles.
Regular cardiovascular exercise, such as cross-training, results in a stronger heart and lungs that are more efficient at delivering oxygen to muscles which, in turn, are more efficient at converting calories into energy.