Parkrun Threshold Finisher
Workout - Parkrun Threshold Finisher
- 5min @ 6'00''/km
- 3.2km @ 4'05''/km
- 1.6km @ 3'37''/km
- 5min @ 6'30''/km
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Intro: A quick breakdown of THRESHOLD TRAINING WENT WRONG? Half Marathon Training Vlog from That Running Guy. The full video has plenty of detail, so give it a watch. The summary is below so you can test the session yourself.
Key points:
- Rather than chasing a PR at every park run, this approach uses it as a structured threshold workout to keep sharpness through training.
- The session pairs a 2-mile threshold effort (target 6:35 min/mi or 4:05 min/km) with a closing mile of fast reps between 5:39 to 6:03 min/mi (3:30 to 3:45 min/km).
- Freezing temps (-2 °C) make breathing harder and throw off pace perception. Plan for it and dress warm.
- The runner uses the VDOT app to calculate paces from a recent 10K result (39:40), which gives the right targets for threshold and interval work.
Workout example:
- Warm-up. 5 to 10 min easy pace.
- Threshold portion. 2 miles at 6:35 min/mi (4:05 min/km), controlled and hard but manageable (below lactate threshold).
- Quick finish. 1 mile of reps, 5:39 to 6:03 min/mi (3:30 to 3:45 min/km). You can break this into 2-minute repeats with short jog breaks if that works better.
- Cool-down. 5 to 10 min easy pace, then stretch.
Practical tips:
- Track your effort with a pace or heart-rate monitor (VDOT app is solid for this).
- Layer up when it’s cold. Base layer plus long sleeves to protect your lungs.
- If you’re gasping, back off the speed a notch and work on holding a steady breath.
- Adapt the paces to your own fitness. The structure (2 mi threshold plus 1 mi fast) works across ability levels.
Closing note: Give this mixed-format park run a shot and set the paces in the Pacing app. You’ll stay race-ready for your half-marathon without overdoing it.