This zone-based ride builds an aerobic foundation, increases aerobic capacity,
and improves cycling economy. This means that your body has to expend less
energy at any given intensity.
Endurance training should make up the largest percentage of your total
training time and it is the foundation upon which you build your fitness and performance goals.
Additionally, an Endurance zone ride improves fat metabolism by increasing
enzyme activity in the working muscles. This boosts your ability to use fat as an energy
source. As you become more proficient taining in this heart rate and cadence zone,
you will find that you burn more fat than you used to and your resting heart rate will
decrease.
Fitness Solutions 
