I'm not a preachy type by nature, or so I like to think. I do shout at the radio a lot, usually when the RTé vowel-eating virus attacks yet another progr'mme presenter (is it just me?). It's because I care.
I last abused the Sony in the corner after hearing a report on top US paediatrician Dr Robert Lustig's comments on the harm done by fructose in processed foods.
The report repeated a familiar list of shock statistics and sombre warnings on obesity trends, type 2 diabetes, etc.
As a reasonable guy, the laissez-faire half of me vigorously defends an Irishman's right to be fat, smoke and/or binge-drink.
Or in my case, be a biker.
But it's not that simple. Somebody please think of the children, as Moe Szyslak would say.
As a society, we are committed to interfering in people's lives for their own good, and via the social insurance principle, to helping out when things go wrong. It's because we care.
Anyway, between the fructose, the fast food, the soft drinks and the salt, we're rushing headlong towards a precipice, and we know it.
Here's the scary bit: 32pc of Irish seven-year-olds are overweight or obese. There's a high rate of carry-through into adulthood, and childhood obesity has a disproportionate effect on adult health.
So, looking at the glass-half-empty scenario, that's hundreds of thousands of weight-related illnesses in the making.
But we know that without resorting to the back of an envelope, because we already have a projection that half of all Irish adults will be obese by 2030.
An awful lot of Irish people are going to die early from the effects of obesity, which seems a shame as nearly all of them will be nice people who would have preferred to stick around. But hey, what can you do?
In my opinion, there is little or no sense of urgency in government regarding either the likely size of the problem or the nature of the available solutions.
I think our priorities are wrong. This isn't SARS, asteroid collision, the rise of China or even geopolitical meltdown; it's a calamity with its origins and solutions entirely within our control.
Neither is the cure something that will in itself damage us or demand painful compromise.
It's all good and – need I say it – a lot of walking will be involved, which is lovely.
For the bread-heads, remember that billions of euro will be lost or saved in the outcome of a campaign which has barely been addressed yet.
Going back to my real brief, which is to write about walking, I have a walking schedule for you. Sit down for a few minutes with that envelope and tot up all the walking you did last week. Don't get into too much of a sweat; a rough count will do, in minutes, hours, miles or whatever.
Now, take that figure and add a lot to it. That's your primary target for this week. The fall-back is whatever you can manage.
However many steps you take next week, – whether it's the recommended 10,000 a day, which make a country mile more than the average, or just a good many more than last week – they'll all be in the right direction for you, your family and Ireland.
Conor O'Hagan is editor of the bi-monthly Walking World Ireland magazine. www.walkingworldireland.com