Hill repeats are a form of training in themselves along with intervals, tempo runs and speed track work. None of them are designed to build endurance and you wont loose any weight doing them. You will get injured long before that.
Your friend i am afraid is trying to get you to "macho" it out. Running is not a macho sport. Try cage fighting if you want that.Its a sport of conditioning conditioning the body to endure by slowly building up the muscles in the legs and hips and core to deal with the repetitive stresses of running. To slowly push back the threshold that lactate acid builds up in your body so you can run further and faster for longer. To increase your ability to absorb and use oxygen until it reaches your personal optimal.
Its not about stripping to the waist and dragging a car tyre up a hill. Not that your doing that but you get the idea?
Find yourself a park of good size and just run a round it. On your own. Walk when you have to. Do it for 20 minutes then go home.
Then choose another day in the week and do it again.
and again.
Then wait for another week and do it three times again
When you can run for 20minutes non-stop with no walking hold that for a week and then and only then increase the time by 10%. Again walking when you have to.
Do this until you can run continuously for 30 minutes with no walking at an easy conversational pace 3 times a week.
Then get back to us.
It should take about 3 months and you would have lost about 3 stone i reckon probably more if you watch your diet and you would be on the way to conditioning your body.
As for hills heres the technique. You shorten your stride. Do not lean into the hill keep your body perpendicular to the slope and you will go up it slower than on the flat but you will go up. No one goes up a hill as fast as they can on the flat.
No one.
Thats impossible.
Good luck
Edited: 30/06/2012 at 21:13