Almost every beginner asks the same question before their first run: how long should I go for? The honest answer is, less than you think. Far less.

The temptation is to head out and try to run for 20 minutes, or even hit a 5K, because that feels like a real workout. The problem is your body isn't ready for that yet, and the most common reason people give up running in week one isn't lack of motivation. It's overdoing the first session and being so sore they can't face the next one.

The honest answer: 20 to 25 minutes total, mostly walking

For your very first run, aim for a session that's around 20 to 25 minutes door to door. Most of that should be walking, with short jogs sprinkled in. A solid first session looks like this:

5 minutes brisk walk to warm up.
1 minute easy jog, 2 minutes walk. Repeat five times.
5 minutes walk to cool down.

Total: 25 minutes. Total running time: 5 minutes, broken into one-minute pieces.

That might feel anticlimactic. It shouldn't. You've just done the right amount of work for your body to adapt without overloading anything.

Why short and easy beats long and hard

Running is high impact. Every stride sends roughly 2.5 times your body weight through your joints. Your bones, tendons and ligaments need weeks to adapt to that load. Your heart and lungs adapt in days, but your tissues take longer.

That mismatch is why beginners can feel like they have the cardio to keep going, but wake up the next morning with sore shins, knees or hips. The legs aren't ready yet, even if the lungs are.

How to know your first run was the right length

You should finish able to hold a conversation. You should be able to walk normally the next day. You should feel like you could do it again in 48 hours.

If you're limping the next morning, the run was too long. If you finished gasping and unable to speak, the pace was too fast. Adjust and try again. Nothing is broken.

How to build from there

Add roughly 10 percent to your jogging time per week. So if your first week has 5 minutes of jogging per session, week two has 6, week three has 7, and so on. By week six, most beginners are jogging for 10 to 15 continuous minutes without stopping.

That's how you get to a 5K. Not by trying to run one on day one, but by adding small amounts of running to walks, week after week, until the running has quietly taken over.

The mindset shift that changes everything

Stop measuring your first runs in distance. Measure them in time. A 25 minute session is a 25 minute session, whether you cover 1km or 4km. As a beginner, time on feet matters more than pace, and consistency matters more than either.

Show up three times a week, keep it short, keep it easy. The distances will come on their own.