Both outside and treadmills have their pros and cons. The pros of running outside are as follows:
- You get the vitamin D you need for strong bones.
- The picture you see keeps moving, so you don't need to stare at one place all the time.
- It burns more calories. Actually, it's easier to run on a treadmill because the belt is moving under you and there isn't any wind resistance for your body to counter.
- Finally, running outside just feels better than in a gym.
However, with treadmill, you are not weather-dependent and can run whenever you want regardless of the wind, snow, heavy rain or hot sun. Plus, you don't need to buy running clothes for freezing weather. You can just get yourself the all-season running apparel. Plus, you won't feel embarrassed when you pass people in the street.
In a nutshell, treadmill running brings as much benefit as running outside. The main idea is as follows: it's better to run than not to run. Happy running!