Wulfgar said:Duration and distance is really secondary to intensity and frequency.
I assume you are running on a treadmill. Utilize the elevation to do your intervals
1:1 intervals where the high intensity part takes you to your anaerobic threshholds as quickly as possible. Hang in there for a MAX of 2 minutes then taper down for 2 minutes
The efect this has on the bodies max VO@ uptake, heart health, cholesterol levels and fat loss is amazing.
5 days a week 45 min MAX so you dont eat away bodyfat
no stricly road run...lotsa hills, pace around 10 minutes a mile, 7 miles three times a week