I must have strained it or something playing with the kids.

Her face was strained with the effort, though she seemed to be in no pain.

Straining with all her might, she simply wasn't strong enough.

My face began to strain with the fear that I was not giving him what he wanted.

The muscles of the daughter's arms strained with the weight.

But they seems highly likely to strain relations with the Chinese even further.

And that, some say, might even strain his relations with politicians.

In a voice strained with fear he cried, 'Tell me, where is the money?

The voice grew strained with the effort of lifting her head.

He looked tired, his eyes red and face strained with anxiety.