The The 100 Day Marathon Plan sales page, captured 2026-09-23
The 100 Day Marathon Plan review
A 100 day marathon build with pace and heart rate targets for every session.
By the RJ Editorial Team. Sales page checked 2026-09-23. Last updated 2026-09-23.
Is it worth it?
You've got a marathon on the calendar, maybe a hundred days out, and the plan you're following is basically run more miles and hope. Or you've done one before, blown up at mile 20, or picked up a niggle in week six and lost a month. That's the itch this is scratching. The 100 Day Marathon Plan comes from Marius Bakken, a doctor who raced as a distance runner at the 2000 and 2004 Olympics. The idea is Italian periodization plus the Kenyan habit of keeping easy days genuinely easy, and the practical upshot is a plan that never asks you to run faster than 10K pace. If you're the sort who turns every tempo run into a race, that ceiling is the most useful thing in it. It also builds backwards from most plans. Short, sharp 5K and 10K work first, then half marathon pace, and marathon specific sessions only in the back half. That's a coherent philosophy rather than a gimmick, and it's been running since 2009, so it isn't a flash in the pan. What the page doesn't do is prove anything. The 5,500 lactate tests, the Olympic names, the 4,600 runners: those are the seller's framing, not results measured on people like you. Take it as a well thought out plan from someone who has done the training, not as something tested and proven for your body.
Pros
- Every session has a pace and heart rate target, so there's no guessing
- The intensity cap stops you wrecking your easy days
- All eight goal plans included, so you can change your target mid build
- Long track record, sold since 2009, and a clear coaching philosophy behind it
Cons
- The page says one time payment, but the billing setup can be a renewing subscription, so check before you click
- No price shown until you reach checkout, and refund terms aren't spelled out
- It's a written plan, not a coach, nobody adjusts it when your week falls apart
- You need a base already, it isn't a couch to marathon programme
What you get
A day by day 100 day schedule, plus all eight goal plans, so you pick the finish time you're chasing (sub 3:30, for example) rather than a generic build. Each session comes with pace and heart rate targets instead of just a distance. The 100 days run through five phases, starting with 5K and 10K speed work, moving to half marathon pace, then marathon specific long runs and a taper.
Before you buy
- Confirm at checkout whether it's a single charge or something that renews, and what the refund window is
- Count back from race day, you want roughly 14 weeks clear to run the full 100 days
- Have a watch that shows pace and heart rate, and a recent race or time trial to set your targets from
Who it suits
Runners with a marathon 3 to 4 months out who already run regularly and keep either getting injured or fading late in races
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