Whatever they saw in her eyes made their knees start to tremble.

My own knees start to give way during the last steep climb.

Until his knee started hurting two years ago, he walked home a few nights a week to keep fit.

If your knee suddenly starts to hurt in an activity, stop what you are doing.

"My knee started getting all big and stuff," she said.

"But in a few years, the knee would have started to wear because of the way the weight was distributed."

The knee starts to hurt about 2-4 months before the actual hip goes.

Her knees were starting to shake, but it didn't feel like fear.

In the second half, I asked out because my knee started bothering me a little.

And now, because his knees had started to tremble, worse than ever before, he sat down on the rock.