997cc047_ng_Zones___Guide___Wattbike_UK__Physiological_Adaptations
[Training Zone] Zone 1 [Purpose] Establish base endurance [Race fitness] More efficient use of energy. Prepares body for harder training, works on technique/skill [Physiological Adaptations] 
Improves fat metabolism, gets muscles/tendons/ligaments/nerves used to cycling. Increases economy
Heart Rate and Power Training Zones - Guide - Wattbike UK
Physiological Adaptations