Pyramid Fartlek Run: 1-2-3-4-3-2-1 Minute Intervals

Session Overview

This 45-minute outdoor pyramid fartlek builds from short bursts to a 4-minute effort and back down, challenging your aerobic system across a range of intensities. The unstructured nature of fartlek — running hard by feel on any terrain — makes it one of the most versatile and enjoyable speed sessions for intermediate triathletes during the early race season.

What You’ll Need

• GPS watch or running watch with timer
• Comfortable road, trail, or park loop
• Running shoes suitable for your terrain
• Water if it’s warm (optional)

Warm-Up (10 minutes)

Run easy for 8 minutes at a comfortable conversational pace (Zone 1–2). Include 4 x 20-second strides at roughly 5K pace in the final 2 minutes, with 30 seconds easy jogging between each stride. This primes your legs and nervous system for the varied efforts ahead.

Main Set

Run the pyramid pattern below. During hard efforts aim for a comfortably hard pace — roughly 10K to 5K pace depending on the duration. During easy jogs between efforts, keep moving lightly to maintain blood flow. The total pyramid takes approximately 25 minutes of running.

• 1 min hard → 1 min easy jog
• 2 min hard → 2 min easy jog
• 3 min hard → 2 min easy jog
• 4 min hard → 2 min easy jog (this is your peak effort)
• 3 min hard → 2 min easy jog
• 2 min hard → 1 min easy jog
• 1 min hard

Cool-Down (8 minutes)

Run easy for 7 minutes at a relaxed conversational pace, allowing your heart rate to drop below 120 bpm. Finish with 1 minute of walking and light dynamic stretches — hip swings, ankle circles, and calf raises — before stretching your quads and hip flexors.

Coaching Notes

• The 4-minute block should feel the hardest — don’t blow up in the 3-minute lead-up
• On the way down the pyramid, match or exceed the effort of the corresponding ascent interval
• Scale easier: reduce the peak to a 3-minute hard effort and cap the total pyramid at 5 blocks
• Scale harder: repeat the full pyramid twice with 4 minutes easy between repetitions
• Target RPE 7–8/10 for the 3–4 minute blocks, 8–9/10 for 1–2 minute blocks