A friend of mine from church is finishing a six-month hike on the Appalachian Trail. He started in TN in March and will finish next week in central Maine. After he stopped using his heavy winter coat and mailed it back home, his backpack only weighs 10.75 lbs.
I once did a backpacking/ rail trip across Europe, and I thought I would be fine with a 30 lb. pack. WRONG !!! I quickly took 10 lbs. of stuff out of that thing and mailed that junk home. 20 lbs. was all I wanted to deal with for 10 hours a day.
Think about all those overweight people that walk around everyday toting an extra 30, 40 or 50 pounds.
I had a friend that recently lost 130#, he is still around 200#.