Moodyman
Legendary Member
The simple answer is of course intervals (there are many combo's of intervals you could use), they give you the biggest bang for your buck
Agree, but not any old intervals. Find a nice hill or two of about 80-100 metres
Power up, jog down, power up, jog down, repeat until you feel like death. That'll develop fitness in no time.
Then do the odd longer run to develop endurance.