Hi there! I've been searching the web for the answer of above stated question but I couldn't get any answer.
So here is some detail about me:
Non-functioning kidney: Left
Reason for failure: Vesicoureteral reflux (VUR)
Age at which it stopped working completely: 13 years
My current age: 16 years
My current weight: 60 kg
My current height: 5 ft. 8 in.
My gender: Male

Now I am going to elaborate my question. I workout at home with my dumbbells weighing 4 kgs but I read somewhere that persons with one functioning kidney only should not lift weights but I think 4 kgs are not very heavy to damage the kidney. Am I right?

My second question is that can I go to Martial Arts club for some martial arts training of course with some protective pads on, and also by telling the trainer about my problem? [PS. This is my dream to be a martial artist from a very long time!]

I hope I will get satisfying answer.

Regards,
A desperate teen.