healthy amounts of diuretic pills and lost weight
You do not need to take diuretics to lose weight.
I started out at 298 pounds years ago. All I did was change one meal to a healthier meal and started walking 10,000 steps a day. In a few months, I was 275. After that I really started to "diet." I was following WW which was giving me calorie ranges like 1500-2000 depending on the day. I started doing Leslie Sansone WATP 1 mile for weeks. I slowly ramped it up to 2 miles, and so on. I also added strength training. I lost 60 more pounds in six months. So walking can give you results. Although I wouldn't worry so much about the incline at first. Weight loss isn't a race!
Also if you have knee issues, check out the book called Rehab your knees. Walking is one of the best forms of exercise for someone with bad knees. But I think the incline could make it worse at first before you build your knee muscles up.
You'll want to aim to lose 4-8 pounds a month for healthy weight loss
. Are you tracking somewhere like my fitness pal, sparkpeople, loseit, etc? If you binge, I recommend reading Full-Filled. Another great book is Beck Diet Solution. I really feel like using some of the tips in these books helps me a lot!
Some people lose better with higher calories (still giving a deficit). So you may want to tweak your calories about 100-200 and see if you get better results. Try getting a pedometer and walking 10,000 steps a day! Then increase it!