From Zero to 10km: The Running Half of the Saitama Workout

Why the run needs the most patience

Your heart and lungs adapt to running within weeks. Your bones, tendons and the small muscles of your feet and shins adapt much more slowly. That's why new runners often feel fit enough to run further long before their legs are ready, and why shin splints and sore knees are so common in the first months.

The full routine is also a lot of running. At 10km on five full days plus a half-distance recovery day, you'd be running about 55km a week. Many recreational runners never run that much. Treat it as a long-term goal, not a starting point.

Start with walk-run intervals

If you can't run for more than a few minutes yet, start with intervals: short jogs separated by walking. For example:

1. 5 minutes of brisk walking to warm up.
2. 1 minute of easy jogging, then 2 minutes of walking. Repeat 6–8 times.
3. 5 minutes of walking to cool down.

Each week, lengthen the jogs and shorten the walks. The NHS Couch to 5K program uses this approach over 9 weeks, with three runs a week, and it has helped a lot of complete beginners reach 5km.

Walking counts. In The Hero Program, the run target is a distance. If you cover it with walk breaks, that's a completed run.

Go slower than you think

Most beginners run too fast, not too far. Use the talk test: you should be able to speak in full sentences while you run. If you can only manage a few words, slow down or walk.

Easy running builds your aerobic base and is far kinder to your legs. Speed can come later, and it isn't needed for the Saitama workout anyway.

Increase distance gradually

A common rule of thumb is to increase your weekly distance by no more than about 10%. The research isn't precise, but in one study of 874 novice runners, those who increased their weekly distance by more than 30% had more distance-related injuries than those who stayed under 10% (the difference wasn't statistically certain).

A Hero Program plan raises your daily run target a little every week. Here's the running column from a real 24-week plan for someone who doesn't run yet:

The first weeks are tiny distances, so the percentage jumps look large but the actual distances stay small. After about two months, the weekly increases settle under roughly 15%. If you are new to running, choose a 24–32 week plan. Shorter plans raise the running distance faster.

Shoes, surfaces and form

• Shoes: comfortable running shoes that fit well matter more than any particular brand or technology. A running store can help you try a few.
• Surfaces: mixing in grass, trails or a track can be easier on your legs than only concrete.
• Form: run tall, relaxed shoulders, short quick steps. Avoid over-striding, where your foot lands far in front of your body.
• Weather: in heat, slow down and drink more. In cold, dress in layers you can remove.

Shin pain and other warning signs

Some muscle tiredness is normal. These are not:

• Pain along the inside of the shin that gets worse as you run (often called shin splints).
• Pain in one specific spot on a bone, especially if it hurts to press on it.
• Knee, hip or heel pain that lingers the next day.
• Any pain that makes you limp or change how you run.

If you notice these, cut back the running (walk more, or rest), and see a healthcare professional if it doesn't improve within a few days. Repeating a week or switching to a longer plan costs far less time than an injury. See rest days and recovery.