Exercise has always been a part of my life. I learned to swim before I could walk, played tennis and netball at school, and at university took up rowing and squash. Now, decades later, I still enjoy an occasional game of squash and I maintain my fitness with regular sessions on an indoor rowing machine.  

I’m lucky enough to have my own rowing machine, which we keep on our balcony during the summer months. The balcony looks out over two tall oak trees, leaning towards each other like old friends. As I row I watch squirrels chasing each other through the trees, leaping insouciantly from branch to branch to the accompaniment of a symphony of birdsong.

Meanwhile the display screen in front of me indicates the distance I’ve rowed, the time I’ve taken, my pace, stroke rate and even my heartbeat. At any instant I have a measure of my performance. 

Often I count along with the strokes, particularly when I am pushing myself towards the end of a workout. When I go to the gym I count too, lifting weights in sets of six or eight, and noting the number of breaths for which I can hold plank position.

This has led me to muse upon how numbers underlie our activities: whether we are counting rowing strokes, football goals, or tricks in a game of bridge; recording the distance we’ve cycled or driven; monitoring blood pressure; or marking birthdays on a calendar. We count the syllables in a haiku, the metrical feet in a pentameter, the notes in a musical scale. 

We (mostly) think in words or images, but numbers – in all their glorious variations, as sequences or patterns or absolute values – provide the unobtrusive ostinato of our lives.

I row. I watch squirrels and numbers, listen to birdsong, count strokes, and muse.  Sometimes my musings evolve into a poem.