Outside running vs treadmill Help!!!

Outdoor running is different in several ways. The terrain is not as smooth, nor is it moving to meet you - all your power needs to move you forwards, as opposed to a treadmill. The air in a gym is generally climate controlled and free of breeze and irritants, which is not the case when you run outside. All of these things make outdoor running harder, but also better for your body. So, your ten minutes outside was worth more than ten minutes on a treadmill If you progress to off-road running you will find the same thing, that it becomes harder and you will be able to do 'less' if you measure it against your road and treadmill running. It's because you're pushing your body harder - keep at it!

It could also be that because you were outside your comfort zone you were more hyped or anxious and were breathing less efficiently as a result? I've known that to happen to a few people when they changed from a regular place of exercise to a new one. Sometimes it's also a case of sticking with it and trying to relax

I started running yesterday too (as opposed to my normal powerwalking) and i found i was going too fast at first.
Then i slowed down and it was much better.
I also found a Running App which i'm going to start to use 'Personal Running Trainer'.
So maybe have a look at a few of the different apps that are around or indeed, go with the Couch to 5K.

1 - the treadmill will pace you...when you're outside, you have to pace yourself...so likely you were going at a faster pace then you usually do.
2 - indoors with a treadmill you don't have to contend with varying terrain, weather, elevation changes, etc
3 - the treadmill gives you some assist...when you're outside, you're 100% propelling yourself.