Had a TKR in Feb, followed by a bad fall end of March. Am now trying to recover again. Am unable to walk unaided as my knee collapses without warning. Physio says it’s because the muscle has not rebuilt yet and I shd ‘think in months not weeks re recovery’. Have been doing many reps of the exercises with almost nothing to show for it. Am becoming very depressed about this as I have always been active but now feel I can’t do anything. Anyone got any experience of dealing with a bad fall and recovery from a knee op. Thanks