Is commuting by bike enough exercise?

For many people, yes. If you ride 20 to 30 minutes each way, 5 days a week, you'll land at 200 to 300 minutes of cycling. That covers the WHO and CDC guideline of 150 to 300 minutes of moderate activity a week by itself.

The part it doesn't cover is strength. The same guidelines recommend two days of muscle-strengthening work, and riding to work doesn't do that.

The effort has to be real

Distance matters less than how it feels. A slow ride on a flat bike path counts as light activity. To reach moderate intensity, you want to be breathing a bit harder than normal and able to speak in short sentences.

Some easy ways to push the effort up on a commute:

• Pick the route with a few hills
• Skip the electric assist if you can, or use a lower level
• Ride steadily rather than coasting to every light
• Take the longer way home once or twice a week

If you arrive sweaty, you're probably in the right zone. If you could ride in work clothes and not notice, it's more of a light activity, which is still good for you but counts for less.

If you ride to work, League of Fitness picks the ride up from Apple Health and scores it by heart rate zones, so a hilly, steady commute counts for more than a coast. The daily match then gives the trip home something to win.

What to add

A commute gives you a base. Fill the gaps like this:

1. Two short strength sessions a week, 30 minutes each. Squats, push-ups, rows and a core exercise are enough.
2. One harder ride or run on a weekend, for variety and to practice higher intensity.

That setup is plenty for general health.

What if your commute is short

Under 10 minutes each way is still worth doing. It adds up to more activity than driving and keeps you moving. But it won't reach the weekly target on its own, so you'd want to add some longer rides or other cardio.

Safety

Wear a helmet, use lights, and pick quiet roads when you can. Riding in traffic carries a risk that a gym session doesn't, and I'd weigh that when choosing a route. If you get chest pain, unusual breathlessness or dizziness during a ride, see a doctor before carrying on.