Most running advice is built around peaking for a specific race: an 8- or 12-week plan that ramps mileage, sharpens with quality sessions, and then tapers. That model works if running is a project. It doesn’t fit if running is a way of living.
The alternative model is to stay close to race shape all year. The goal is not “what is my fastest possible time at race X” but “if I woke up tomorrow and decided to run a half marathon, could I do it at a respectable pace without being wrecked for three days afterwards?”
This is sometimes called “endurance durability” — fitness that’s always there in the background, not just at the peak of a cycle.
What it looks like
A reasonable steady-state week for someone who wants to stay half-marathon-ready year-round, with a day job:
- 2 × easy runs (45–75 minutes each, conversational pace)
- 1 × long run (90–120 minutes)
- 1 × quality session (intervals, tempo, or hill repeats)
- 1–2 × cross-training (bike, swim, climb, hike, weights)
- Daily mobility and core work
That is 3–4 runs and 1–2 non-running sessions per week. About 40–60 km of running. Enough to never be more than a couple of weeks from comfortably finishing a half marathon. Layer in a few 25–30 km long runs and the same person is close to marathon-ready as well.
Principles
Run mostly easy
70–80% of running should feel conversational. This is the part most amateurs get wrong. They run their easy runs too hard, which compromises both the easy runs (no longer truly easy) and the quality sessions (too tired to do them well).
Long-run philosophy
Most long runs should be easy. The goal is to be able to finish fresh. Every few weeks, make the last 30–40 minutes of a long run at marathon effort to train fatigue resistance. That’s enough quality at distance.
Always 40–60 km/week
The sweet spot for staying within striking distance of a half marathon is roughly 40–60 km (25–40 miles) per week. Below 30 km/week, fitness erodes faster than people think. Above 70 km/week, durability isn’t really increasing but injury risk and recovery debt are.
Strength and core matter more after 35
Connective tissue degrades faster than cardiovascular fitness. Two short strength sessions per week — kettlebells, squats, lunges, RDLs, pull-ups, push-ups — keep glutes, hamstrings, and the trunk strong enough to maintain form when fatigue arrives in the back half of a long race. See Core Stability for Runners for runner-specific core work.
Cross-training is durability insurance
A weekly indoor bike session at Zone 2 adds aerobic volume with zero impact. For runners over 35, this is one of the most efficient ways to keep building the engine without breaking the chassis.
Why this works
The “always close to race shape” approach trades peak performance (a small absolute loss) for several big gains:
- No peak/taper cycle means no off-season detraining followed by re-building.
- Injury risk drops because mileage doesn’t spike.
- Mental fatigue from training cycles disappears.
- Spontaneous races and adventures become possible without panic-cramming.
For most amateurs whose 10K times are unlikely to drop further with even more training, this is a strictly better trade. For someone genuinely chasing PRs at the limit of their genetics, structured periodisation still wins on race day.