I applied for a job with a big delivery company. During the interview, they told me every applicant has to take a strength test, to make sure they can lift and carry heavy boxes. I have a back injury that limits how much weight I can lift, but I can move boxes with the assistance of a mechanical hoist device. (I've done similar work in the past, despite my injury.) Do I have to reveal my injury this early in the process? I thought the ADA prohibited employers from going into any medical or disability-related issues until they make a job offer.