<span>Work up to three miles of running for as long as you can at your goal pace. Once you fall off your pace, stop, walk and recover for two minutes and continue running shorter intervals until you reach a total distance of three miles. Long run Saturday: 4-6 miles easy pace.</span>
A higher resting heart rate means that your metabolism is higher (you burn more calories resting than the average person). This is the opposite for a slower resting heart rate, which means your metabolism is lower and less calories are burned resting.
I think the answer is the cochlea and/or the vestibular system.