Cardiorespiratory

8-16% improvement at all levels of work

Improved cardiorespiratory function

• 6 weeks of interval training dramatically improves the heart’s ability to perform cardiac work by approximately 10-15% at all levels from rest to very heavy work, reducing the stress on the heart at any given workload (via reducing a measure known as the Pressure Rate Product)

As we exercise, both our heart rate and ejection pressure (blood pressure) must increase in proportion to the amount of work being done in order to fulfill the increased demand for blood by our muscles. The work being done by the heart is therefore equivalent to the heart rate ? ejection pressure I.e a measure called the Pressure Rate Product.