Energy Systems
Energy Expenditure
Current: 14.6 kcal/min
Per hour: 878 kcal/hr
Substrate Use
Fat: 719 kcal/hr
CHO: 159 kcal/hr
Glycogen: 39.8 g/hr
Training Zone
Zone 1 (Recovery) - Technical focus and recovery
Recovery runs, drill work (65-75% max HR)
Metabolic State
Primarily Aerobic: Majority of energy from oxygen-dependent pathways
Blood Lactate Status:
Estimated Blood Lactate:0.8 mmol/L
Aerobic zone: Lactate production and clearance balanced
Fat 40.0%
Glycolysis 60.0%
Anaerobic 0.0%
ATP-PC 0.0%
Fat Oxidation
Primary fuel at low HR zones. Most efficient but requires oxygen.
Aerobic Glycolysis
Glucose breakdown with oxygen. Dominates middle HR zones.
Anaerobic Glycolysis
Lactate-producing pathway. Increases in higher HR zones.
ATP-PC System
Immediate energy source. Used for bursts in all zones.