PE
Characteristic | ATP-PC energy system | Anaerobic glycolysis energy system | Aerobic energy system | Aerobic energy system |
Fuel source/s | Creatine phosphate | Carbohydrates | carbs | fats |
Intensity of activity | Very high 95% max HR | High 85% max HR | Submaximal >65% VO2 max | Submaximal <65% VO2 max |
When system is provides most ATP during activity | 1-5 sec | 5-30 sec | 30 sec + | 2-3 hours |
Yield of ATP produced | lowest | low | large | largest |
Rate of ATP production | Rapid | fast | slow | Very slow |
Metabolic by-products | Pi and ADP | Lactate, H+ ADP | CO2, heat H2O | CO2, heat H2O |
Total event duration for energy system to provide most ATP overall | 1-10 secs | 10-75 secs | 75 sec+ | Dependent on glycogen depletion |
Fatigue mechanism | Fuel depletion (pc) | Accumulation of H+ | Fuel depletion | Fuel depletion thermoregulatory |
Recovery modality | Passive | Active | Active | Active |
Event examples | 100m sprint - or shot put | 400m Sprint 100m freestyle | 5000m run 800m run | Marathon/Ironman |