It's not implausible. I used to be skinny like you, everything from getting up in the morning to getting out of the shower (cold) was worse. Standing was harder

It's not implausible. I used to be skinny like you, everything from getting up in the morning to getting out of the shower (cold) was worse. Standing was harder. For me standing a few hours a day is not about back pain, but for better posture and more energy.