my doctor told me i had chrodromalacia that i need swimming or stationary bike for my knees are weak and painful sometimes. He gave me antinflammtorys told me it might go away in two weeks of talking the antiflammtorys. i dont have easy access to a pool so i ordered a stationary bike .do you cathe like bicylcing? And i wonder still if it will bother my knees too?My doctor also said the height must be right on the bike or it can do the opossite and hurt my knees but on the other hand he said if the height is right it should strenghten my knees .