Went for a run outside today but only managed 10 to 15mins not consecutively either. A friend of mine is coming with me on monday so it it will take my mind off how my calves ache.
Still prefer inside but know I have to get used to running outside on inclines in preparation for my 5k at the end of june.
A good bit of news though: am finally getting a garmin a forerunner 10 which is ok as all I want to know is how far and fast i am going and calories burned,
It is harder work outside and I think that the cold weather can make it harder to get your breathing right too. Just build it up gently, you'll be fine. Plenty of time between now and June 
It is nice to have a running buddy for company, it does help to keep you going.
Funny enough I always found the treadmill much harder because I struggled mentally without the distraction of "the great out doors" for lack of a better term. Hopefully your legs will adapt quickly enough. How long to your 5k?
Just saw its the end of June
It's definitely much harder running outside. After 2 months off I can still happily do 5k on a treadmill but struggle to do more than 2k outside. It is better when it's a bit warmer so hopefully as the weather gets better you will find it more fun
I compared two of last weeks runs:
Outdoors 4.1 miles (including warm up/cool down) in 51 min 10 s with 2 walking breaks.
Treadmill 4.2 miles (as above) in 45 min 15 s non-stop.
On the treadmill I'm not far from 5k in 30 mins; outdoors I've a *very* long way to go! But hopefully some nicer warmer weather will help us all... 
Inside to outside...
First run outside in weeks
First Park Run & Outside Run Completed!
Treadmill compared to outside?
Awesome early morning run WK2R3 OUTSIDE (wooohoo!)
