The first time I encountered health monitoring, there was blood everywhere. It was five years ago and I was spending Easter with some friends of mine in Wales. I came down to breakfast one morning to find our host's thirty-something brother fiddling with a small white device beside the kitchen
John Walsh: The fad for fitness apps is unhealthy
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Using technology to track fitness is very popular in Hollywood circles. Photo / 123RF
There are thousands of them, connected to your smartphone or attached to your wrist, offering 24-hour health checking. There's Fitbit and Jawbone and MyFitnessPal, which can monitor your heart rate, blood pressure, blood oxygen levels, even your sleeping patterns; there's Fitnet and Sworkit and Fitmo, which act like personal trainers, give you workout videos and "fitness schedules" and ask, sarcastically, why you chose to stop in the middle of a particularly gruelling hill-climb. There's a really annoying one called PumpUp, a kind of Instabrag, "the perfect place to post progress photos and motivate other like-minded people to meet their fitness goals". Can you imagine the kind of person who'd sign up to that?
There are many, many more - and some have been given the thumbs-up by the NHS.
They're very popular in Hollywood circles, and even in the less glamorous environs of the Palace of Westminster. As The Independent reported yesterday, George Osborne was spotted wearing a Jawbone wristband in a committee hearing two years ago, presumably checking to see how his blood pressure fountained as he fielded enquiries about VAT. But now voices have been raised, asking if these devices are actually good for you.
The British Medical Journal published a debate on the things this week, in which a Glasgow GP, Dr Des Spence, eloquently warned that health apps could be bad for you. He thundered about "middle-class neurotics continuously monitoring their vital signs while they sleep". He fulminated against "corporate medicine and the drug industry who conspire to make us neurotic". He asked: "Will apps simply empower patients to over-diagnosis and anxiety?" And ringingly concluded: "Humanity is wasting its time on monitoring life rather than getting on and living it."

I wholeheartedly agree with the good doctor, while noting that there's nothing terribly new about excessive self-diagnosis. People have fretted for centuries about random twinges or irregularities and, on looking them up in, say, Black's Medical Dictionary, concluded that they have impetigo, thrush or bubonic plague. In Three Men in a Boat by Jerome K Jerome, the narrator reads a medical journal in the British Museum and becomes convinced that he has typhoid fever, cholera, diphtheria and St Vitus' Dance - the book was published in 1889. What's different now is that healthy people can be alarmed, not by twinges, but by a faulty reading on their app - an electronic error - and pitched into a hypochondriachal gloom that makes their work suffer.
But Dr Spence makes an additional point that's alarmingly zeitgeisty. He says that health monitoring will lead people to subscribe to "the unspoken yet widely held view of illness - that there are the deserving sick... and the undeserving sick. Death and disease is a lottery outside our control. So when the 'undeserving' sick get sick, they feel cheated".
You see where this takes us? To the idea that those who don't closely monitor their health "had it coming" if they fall ill, just as surely as if they smoked Capstan Full Strength all day; and to the counter-idea that those constantly on the medical qui vive somehow deserve to live for ever.
In other words, it's a correlation of health with morality and decency, not just with the taking of exercise - a pernicious kind of body fascism that goes back to one of Juvenal's famous Satires, which suggested that only a healthy body could produce a healthy (as in virtuous) mind.
I'm sure the users of health apps would deny any such thoughts as they pound through their fitness schedules or check their blood pressure before and after making love to their fit and glowing partners. The rest of us, though, know that look - the look on my thumb-pricking Welsh friend's face - that says: "Oh dear, oh dear. Your cholesterol count may be low. But because you don't care whether it is or not, you'll never join the master race, will you?"
- The Independent