I started driver helping right around... the beginning of peak I guess? - when they first started bringing on helpers this season. They put me with a seasoned driver. This guy had been driving this route for a long time. He was 'older', but he could really run. I had to really try to keep up with the pace. After the first day, he got sick, but his cover driver was also quick. These guys are good. It began on a Wednesday, and by the weekend... my knees were effing killing me. It was really bad. I had never considered calling into work before, but I really thought about it that Monday. I was getting sharp pains, particularly in my left knee. Eventually I got a knee brace, and I started taking Alieve twice a day, which helped a little, but I was limping around pretty badly. I was continuing to help this driver while they found him a good replacement helper, but we were on a different arrangement since I couldn't run anymore. When I met him daily, I would deliver to his businesses (half of a shopping area), while he setup the truck as best he could, depending on how full it was that day. Then we would head off and do residentials. I would be the one finding, preparing stops, and setting up the truck, while he ran them. Most of that was just a story I guess, but what I'm wondering is if any of you have had this sort of knee pain before, and if you ever had it checked out to find out what exactly was causing it. I spoke to someone who works in a medical filed, and I might have strained my tendons... but I don't know for sure because I definitely can't afford to see a doctor about it, as I haven't been with UPS for a year yet to get the insurance. I had to stop helping for almost two weeks, as the pains were seriously affecting my work in preload. After that my knees got better, and they put me with a driver who was not so demanding. EDIT: I should probably explain the pains more thoroughly. It felt like the bones in my legs hurt. Putting any sort of pressure on my knees gave me sharp pains. If I was to jump off of a step, I might have potentially collapsed to the ground, as my knees felt extremely weak. My left knee was about 200% worse than my right.