A triathlon training track workout featuring multiple athletes performing 200-meter sprints at 80-85% effort on a professional running track. The back

Boost Running Speed with This Triathlon Track Sprint Workout

Building Speed Endurance with Track Intervals

This triathlon track workout focuses on improving speed endurance through high-intensity sprint intervals. Athletes will run 200 meters at 80-85% effort, followed by a 100-meter walking recovery, repeated over a 20-25 minute main set. The session starts with a 10-minute easy run to the track and concludes with a 10-minute cooldown run back to the starting point. This structured interval training allows athletes to push their speed limits while maintaining proper running form.

The Science Behind Sprint Intervals and Fatigue Management

Research on multiple sprint work highlights the importance of ATP resynthesis and aerobic fitness in delaying fatigue. Short sprints rely on phosphocreatine (PCr) and glycolysis for energy, while recovery periods allow for oxygen uptake (VO2) replenishment. If recovery is too short, PCr stores remain depleted, leading to increased intracellular phosphate (Pi) accumulation, which contributes to fatigue and decreased performance. By balancing high-intensity efforts with adequate recovery, this workout optimizes both anaerobic power and aerobic efficiency—critical components for triathlon race-day success.