I locked my knees and made myself turn to look at the field again.

He had to lock his knees to brace himself up.

I glanced at his wife, who had apparently locked her knees.

And I lean forward on my right foot, knee locked into position.

She locked her knees so that they would not buckle.

She needed to sit, but she locked her knees straight.

Matt had his knees locked to keep from running.

Covenant stood straight and stiff, at attention, with his knees locked to keep him from falling.

If she hadn't already locked her knees in place, they would have collapsed beneath her.

Embarrassed, she locked her knees together and shook her head.