Body of evidence

Technology has revolutionised what we measure about ourselves. But is all that tracking good for our health?

TODAY, I’ve been on the phone four times, for an average of 24 minutes a call. My last phone call was 22 minutes 23 seconds long, according to the digital time device on my landline.

It took me exactly 45 minutes and 10 seconds on the train to get home the other night: I counted the seconds on my smart phone.