Why would mr universe need both knees replaced?

Depends... Tough to answer. In addition to the large weight demands on his knees, he may also have had injuries to his cartilage or an alignment abnormality that could have increased his likelihood to need knee replacements.

Related Questions

Had both knees replaced, then a revision on one. Three surgeries 12 months. I have no strength or stability in my knees. What exercises are best?

PT and Quads. In general you will need to do quadriceps exercises. I think the specifics of your problem need to be evaluated and you need to initiate your exercise program with formal pt. Building up the thigh muscle will give stability to your knee . You need to discuss this with your orthopedic surgeon. Read more...
Quad and hamstring. Best way to stabilize the knee is with quadriceps and hamstring strengthening. A good exercise for strengthening the quadriceps are leg extensions. A good exercise for strengthening the hamstrings are leg curls. Also, strengthening the hip abductor muscles will help. Read more...

If my 78 yr old father just had both knees replaced, what should he use to strengthen the rest of his legs?

Quad exercises. After a knee replacement, most patients will have quad inhibition and weakness. He can improve the situation by strengthening the quad muscles. Exercises like straight leg raises, stationary bicycle, and slow stair-walking will not harm the knee and can relieve symptoms. His therapist will likely be working on all these already. Read more...
Exercise. Exercises directed at strengthening the quads and hip abductors such as waking, cycling and swimming will have the best overall effect. Read more...
Post tkr. There r a variety of standard post op protocols to advance ones thigh and leg muscle strengthening. Typically one is given direction with sequential monitoring by a physiotherapist for 3-4 months.Your surgeon should be able to provide appropriate direction. Read more...