Warmup
- 1 mile easy
- Dynamic drills: leg swings, A-skips, walking lunges
- 4 x 100m strides
- 90 seconds rest before rep 1
Main Set
3 x 2 miles at half-marathon effort, 2 minutes jog recovery between reps.
Half-marathon effort means a pace you could hold for 13.1 miles on a good day — controlled, rhythmic, sustainable. Slower than threshold, faster than your easy long-run pace. You should be able to say a full sentence at the start of each rep, gasping a little by the end.
Two miles is eight laps. The first lap should feel like a warmup. Laps four and five are where the workout starts to bite. Lap eight is the closer — same pace, more grit.
Across the three reps, splits should be remarkably even. Rep 3 within 10 seconds of rep 1. If rep 3 is more than 30 seconds slower, you went out as a tempo workout, not an endurance session.
Cooldown
- 1 mile easy
- Stretch: full lower body, especially hips and glutes
Coach’s Notes
This session sits at the foundation of endurance running. Half-marathon effort is the pace your aerobic system runs most efficiently at — fast enough to be a real stimulus, slow enough that you can pile up volume. Three two-mile reps is six miles of quality work, which is more aerobic load than most threshold sessions deliver.
Two-mile repeats are a litmus test for pacing discipline. Anyone can run two miles hard once. Doing it three times with 2 minutes jog between is about restraint, not effort. The athletes who run this well treat the first rep like a warmup, the second like a workout, and the third like the second.
Heat is the variable in early summer. If it’s already 75+ at 7am, drop the pace by 10–15 seconds per mile and call that the win. Aerobic fitness is built in the effort, not the clock.
Scaling
Newer runners: 2 x 2 miles, or 3 x 1.5 miles. Same effort, same 2 minutes recovery. The reduced volume keeps the quality high.
Advanced runners: 4 x 2 miles. Or hold the 3-rep structure and run the last rep as a cutdown — first mile at half-marathon effort, second mile at 10K effort. Closes the session with a real gear shift.