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I'd be willing to bet there are alot of things you are not aware of. That's OK, no one knows everything. Besides I wasn't giving medical advice I was offering a suggestion based on common sense and experience.I was unaware that UPS had a medical doctor working as a Package Driver...err..I mean Service Provider.
Do you write prescriptions in addition to giving medical advice?
Tell ya what if you doubt what I said about the angle of the leg and the stress on the knee ask any orthopedic doctor.Same with the stress on the shoulder.