Increasing intensity in this manner will definitely help your burn more
calories during your workout. Now, definitely does cause
stress to the joints. If you are concerned about this then try a similar intensity on the
gym elliptical. This machine is much more friendly to the joints than the
treadmill or track.
It is important to remember, that a particular
heart rate at a given duration will burn the same amount of
calories on either the track,
treadmill, elliptical or even a stationary bike. It all depends on what type of exercise you are most comfortable with.
Safety and injury prevention should always be your primary concerns.
