1000m Run Intervals for Speed

Session Overview

This 45-minute session builds speed endurance through 1000-metre repeats at a pace faster than your threshold. It is one of the most effective interval sessions for improving your 5K and 10K race pace, which directly benefits your triathlon run leg.

What You’ll Need

• Running shoes suited for road or track
• GPS watch or a measured 1km loop
• Flat terrain — a park path, athletics track, or quiet road

Warm-Up (10 minutes)

10 minutes easy jogging followed by 4 x 100m strides at 85% effort. Walk back to the start between each stride. Finish with 30 seconds of high knees and 30 seconds of butt kicks.

Main Set

The intervals should be run at approximately your current 5K race pace — hard but controlled.

• 5 x 1000m at 5K race pace (RPE 8-9 out of 10)
• Recovery: 90 seconds slow jogging between each interval
• Pacing guide: If your 5K PB is 25:00, run each 1000m in 4:50-5:00. If your 5K PB is 22:00, aim for 4:15-4:25
• Scaling down: Reduce to 4 x 1000m if you are new to interval training. Build to 6 x 1000m over several weeks

Cool-Down (5 minutes)

5 minutes easy jogging gradually reducing to a walk. Stretch calves, quads, hamstrings, and hip flexors. Foam roll your IT bands if available.

Coaching Notes

• Run the first repeat conservatively. It should feel fast but not maximal. Save your hardest effort for the final interval
• Focus on maintaining form when fatigued — drive your arms, lift your knees, and keep your posture tall
• If your pace drops by more than 10 seconds per kilometre in the later intervals, stop the session. Quality matters more than quantity
• Allow 48 hours of easy training before and after this session for adequate recovery