The Six-Week Build: Turning Desk Legs Into Hill Legs
One big hill day, six weeks out
Every mountain day begins in a warm room with someone saying "we should do the big one this year". Then the date gets booked, the group chat goes quiet for a fortnight, and you remember you last climbed anything more demanding than a fire escape in November.
Six weeks is not much. Six weeks is also plenty, provided you stop thinking about training as a heroic overhaul and start treating it as a small, boring, repeatable habit. You do not need to become an athlete. You need to be able to walk uphill for six hours, eat a sandwich while doing it, and still make sensible decisions on the way down when your legs are filing complaints.
Here's the shape of it: three short midweek sessions of 30–40 minutes, one longer walk at the weekend, and one deliberate rest day when you do absolutely nothing heroic. Fit that around work, and you'll be genuinely surprised where it gets you.
The three weekly sessions
Session A — the climb
Uphill is the whole job. Stairs, a step machine, a steep grassy bank at the edge of town, hill reps in the park. Ten to fifteen minutes of continuous climbing, then walk back down and repeat if you've got it in you. Aim for the kind of effort where you could speak in short sentences but would rather not.
If you work in an office with a lift, the stairs are free and nobody will judge you for taking them twice at lunch.
Session B — the engine
Forty minutes of easy running, cycling, swimming or brisk walking — anything that gets your heart rate up and holds it there. The point is not speed. The point is that on the day you'll be working for hours at a moderate output, and your cardiovascular system needs to know that's allowed.
Session C — the chassis
Eccentric leg work is what saves your quads on the descent. Step-downs off a bench, split squats, calf raises off a stair, single-leg balance work, side planks. Two or three sets of each, slow and controlled, twice a week if you can manage it. It takes fifteen minutes and it will make the walk down off the hill feel like substantially less of an insult.
The week-by-week plan
Weeks 1 and 2 — build the habit
Don't chase heroics. Get the three sessions done and do one walk of 90 minutes to two hours at the weekend, ideally with a bit of up in it. Keep a rough note of how each session felt. This is your baseline, and it's the most useful data you'll collect all block.
Weeks 3 and 4 — add load
Increase the midweek climbing to 15–20 minutes, keep the engine session at 40–45 minutes, and add a weighted component: a 5kg pack on your stair reps or on the weekend walk. Weekend walks stretch to three hours. If something niggles, back off — a skipped session in week three is a bargain compared to a strained calf in week five.
Week 5 — the dress rehearsal
This is the important one. Do a genuinely big walk: four to five hours, 600–800m of ascent, proper boots, a proper pack with everything you'd carry on the day. Do it in the weather you'd expect, not the weather you'd hope for. Eat and drink exactly as you plan to on the real thing, and take note of what you didn't touch — that's weight you don't need to carry again.
Do it somewhere with a bail-out option and a cafe near the end. Half the value of this walk is discovering that your plan works; the other half is discovering which of your assumptions are nonsense.
Week 6 — taper and pack
Cut the midweek volume by about half. Keep one short, sharp climb to remind your legs what's coming. Then spend the time you'd normally spend training on the boring admin that actually decides the day: route notes, transport, a kit layout on the living room floor, an early night.
No new kit this week. That's a rule, not a suggestion.
The bit everyone skips
Recovery is training. Sleep is where the adaptation happens, so don't sabotage it by staying up until midnight watching videos of the hill you're about to climb. Eat enough protein and enough salt. Take a genuine rest day after your longest walk of the week, not a "rest day" that involves a five-mile errand by foot.
Soreness in the first fortnight is normal. Sharp pain, joint swelling or anything that makes you limp is not — get it looked at rather than training through it in a grim display of stoicism nobody asked for.
What "ready" actually feels like
You won't feel like an athlete. You'll feel like someone who can climb for two hours without needing to stop every ten minutes, and who knows what their body does when the ground gets steep.
That's the whole target. The summit isn't a fitness test — it's a consequence. Six weeks of small, unglamorous sessions gets you there comfortably, and leaves you with enough in the tank to enjoy the bit at the top instead of gasping through it with your hands on your knees.
