800m Track Repeats: Speed Endurance Run Session

Session Overview

This 60-minute track session builds speed endurance through 800m repetitions — the ideal distance for developing the sustained pace you need in the run leg of an Olympic or 70.3 race. You will build lactate tolerance while training your body to run fast when already fatigued.

What You’ll Need

• Running shoes (race flats or lightweight trainers)
• GPS watch to track pace and splits
• 400m running track (most local athletics clubs offer open sessions)
• Warm clothing for the cool-down in cold weather

Warm-Up (15 minutes)

Jog 1200m (3 laps) at easy conversational pace. Then complete two laps of dynamic drills: high knees, butt kicks, lateral leg swings, and A-skips, taking one drill per straight. Finish with 4 x 80m strides at 5K effort with a walk-back recovery. This sequence raises your heart rate progressively and primes the neuromuscular system for high-effort running.

Main Set

Run 5 x 800m (two laps each) at your current 5K race pace. The goal is to hit each rep within 5 seconds of the target time — not to go harder and fade over the session. Take exactly 90 seconds of static rest between each repetition (stand or walk, not jog). Target RPE of 8.5–9 out of 10 for each effort.

• Rep 1: 800m at target 5K pace. Note your split for each 400m lap.
• Rep 2: 800m same target. Aim to negative split — run the second lap 1–2 seconds faster.
• Rep 3: 800m same target. This is often the hardest rep — focus on form through fatigue.
• Rep 4: 800m same target. If feeling strong, take the first 400m at target, then push the second.
• Rep 5: 800m — go as hard as you can sustain for the full distance. Empty the tank.

Cool-Down (10 minutes)

Jog 1200m at easy effort, then walk 200m. Spend 5 minutes on static stretching — quads, hip flexors, calves, and hamstrings. The cool-down is not optional after this session: lactic acid clearance and mobility work now will significantly reduce soreness over the following 48 hours.

Coaching Notes

• Use your 5K PB to set target pace — approximately 5–10 seconds per km slower than your best 5K per-kilometre pace
• The most common mistake is starting too fast on Rep 1 and dying on Reps 3 and 4 — discipline over the first lap pays dividends
• Beginners: reduce to 3 x 800m with 2 minutes rest; advanced athletes: add a 6th rep or reduce rest to 60 seconds
• Heart rate should reach 90–95% max HR by the final 200m of each rep