THRESHOLD TRAINING WENT WRONG? Half Marathon Training Vlog - That Running Guy

Aug 13, 2025

Intro: This is a quick summary of THRESHOLD TRAINING WENT WRONG? Half Marathon Training Vlog from That Running Guy. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points:

Instead of sprinting for a personal‑best at every park‑run, the host uses the session as a structured threshold workout to stay fresh during a training block.
The plan combines a 2‑mile threshold effort (around 6:35 min/mi or 4:05 min/km) followed by a final mile of interval‑type repetitions ranging from 5:39 – 6:03 min/mi (3:30 – 3:45 min/km).
Cold weather (‑2 °C) can make breathing harder and affect pacing, so adjust expectations and dress accordingly.
Using the VDOT app, the runner sets paces based on a recent 10K time (39:40) to determine appropriate threshold and interval paces.

Workout Example:

Warm‑up – 5‑10 min easy jog.
Threshold segment: 2 miles @ 6:35 min/mi (4:05 min/km) – steady, comfortably hard (just below lactate threshold).
Interval finish: 1 mile of interval reps, aiming for 5:39 – 6:03 min/mi (3:30 – 3:45 min/km). You can break the mile into 2‑minute repeats with short jog recovery if preferred.
Cool‑down – 5‑10 min easy jog, stretch.

Practical Tips:

Use a heart‑rate or pace‑monitor (VDOT app) to stay on target.
In cold conditions, wear a base layer and a long‑sleeve top to protect lungs.
If you feel overly breathless, slow the interval pace slightly and focus on steady breathing.
Adjust the paces to match your own fitness level; the structure (2 mi threshold + 1 mi interval) works for most runners.

Closing Note: Give this mixed‑threshold/interval park‑run a try and tweak the paces to suit you in the Pacing app. You’ll stay sharp for your half‑marathon without over‑reaching—onwards and upwards! 🚀