In retrospect, I have bad timing

I'm going to the doctor in an hour or so for a consult that may result in me getting an ultrasound done on my kidneys. The bad thing is that I'm almost certain they're going to poke me around my torso and ask if it hurts. And it will. From doing push-ups. And squats. For the first time in many, many months. So I'm hoping I can say that, and then they'll be like "Well do ten pushups and ten squats," and I'll do them, then they'll poke me again, and if the pain level changes, they'll assume it's due to the exercise and not my kidneys. That'll be scientific enough, I think. Kidneys aren't affected by exercise. Numerous studies have confirmed that, right?