Runners, as you know, are a passionate group of people and are ready to defend their hobby/passion as superior to walking in order to stay fit, but is it really?

The truth is that both walking and running are good for your heart and mental clarity, but one might be more what you’re looking for than they other, depending on what you’re focused on accomplishing.

When deciding whether or not running is the best choice for you, here are 5 ways it affects your body differently than a walk.

5. It can build better bone density.

Physical exercise is a decent way to stimulate bone formation. Your body has to adapt to having more pressure on your joints, which doesn’t always have to be a bad thing.

As your body gets used to the healthy pressure, your bones are less likely to break.

4. It impacts your joints more.

If you’re running with correct form, the impact on your joints can be positive, but if it’s not, you could experience more injuries than walking would cause.

You’ll want to pay attention to the way your foot hits the ground and adjust your form to allow your body to absorb the shock safely.

3. You expend more energy.

You’ll expend about twice as much energy running than you will walking, so if you’re short on time and want to burn those calories or build muscle in half the time, a run might be the order of the day.

2. It targets different muscle groups.

When you walk, you step on your heels first, but when you’re running, you should be landing on your mid-foot first.

The difference in stride impacts what muscles are used – walking will work your hamstrings more, while running focuses on your quads.

1. It can have a greater effect on your hormones.