A brisk walk or a few lengths of the pool could be all you need to turn the day around. (health-and-parenting.com)
The arena fell silent before the starting gun sent them off on two lengths of the pool in what swimmers consider the most punishing stroke. (fortune.com)
We relax now while our kid cannonballs into the deep end and swims the entire length of a pool. (jillianlauren.com)