Race Pace Run Intervals: 5 x 800m Track Session

Session Overview

This 800m repeat session develops race-pace speed and lactate tolerance for sprint and Olympic distance triathlons. Intermediate runners will build sustainable running power at race intensity, while learning to manage effort and recovery between quality intervals — a key skill for the run leg of any triathlon.

What You Will Need

• Running track or measured flat road loop (400m or 800m loop ideal)
• GPS watch or stopwatch to track interval times
• Running shoes with good forefoot cushioning for track work

Warm-Up (12 minutes)

10 minutes easy jogging at RPE 4/10, followed by 4 x 20-second strides at 80% effort with 40-second easy jog recoveries. Finish with dynamic mobility: leg swings, high knees and hip circles for 2 minutes. You should feel loose and ready to run fast, but not fatigued.

Main Set

Complete 5 x 800m at your current 5km race pace, with 90 seconds easy jog recovery between each interval. The goal is consistent pace across all five reps — do not sprint the first two and fade on the last three.

• Rep 1: 800m at 5km race pace — focus on relaxed, tall running form
• Rep 2: 800m at 5km race pace — maintain pace, arms relaxed
• Rep 3: 800m at 5km race pace — this is the test rep; if you fade here, the target pace is too aggressive
• Rep 4: 800m at 5km race pace — hold form as fatigue builds
• Rep 5: 800m — finish strong; slight negative split if possible
• Recovery: 90 seconds easy jog between each rep

Cool-Down (8 minutes)

10 minutes easy jogging at RPE 3-4/10, gradually reducing to a walk. Follow with 5 minutes of static stretching — hip flexors, quads, calves and hamstrings. The cool-down is when much of the training adaptation occurs; do not skip it.

Coaching Notes

• Target pace for each 800m is your current 5km race pace — not 1km race pace. Going too fast early is the most common mistake.
• Common mistake: cutting the recovery jog short. The 90 seconds needs to be genuinely easy to allow lactate clearance before the next rep.
• Scale down: reduce to 4 x 600m if 5 x 800m is too challenging initially
• Scale up: add a 6th rep or reduce recovery to 75 seconds for athletes targeting sub-40 minute 10km off the bike