One of my favourite ageing blogs comes from an American scientist called Dr Josh Mitteldorf. Last year Josh reviewed the science behind the five things he considers most helpful in fending off dementia: physical exercise; mental stimulation and social interaction; metabolic syndrome/insulin sensitivity; diet; and drugs/supplements. We would add sleep, but Josh didn’t (clearly he’s a good sleeper… lucky man!)
He began his survey expecting to find stimulation and social engagement as the most important factor, following a huge 2001 survey in which ‘emotional support’ grabbed the Number One spot for staving off cognitive decline.
But that wasn’t the conclusion he came to. After reviewing the research conducted since 2001, he found that exercise was the clear winner, the Number One factor for ageing well. More important than diet…or supplements… or drugs…. or brain training… or social interaction.
We already know that active people live an average of five years longer than inactive people, but recently the impact of regular exercise on the microbiome has been investigated – with equally startling results. It appears that people who exercise alter the composition of their gut bacteria, even changing the genes of many microbes, without any changes to their diet.
So not only does exercise benefit our hearts and brains (as well as our bones, balance, inflammatory markers, blood pressure, cortisol levels etc etc), but it’s also appreciated by our gut bacteria. Thus was born my second New Year’s Resolution – to be more active!
So what exercise to do? Well, the answer is whatever you like as long as you do something (we’re keen on walking, dancing and table tennis). But recent research suggests the most beneficial exercise when it comes to ageing may be HIIT, high intensity interval training (yes, an awful, off-putting term but I’ll come to that in a minute). A study published in the publication, Cell Metabolism, found that HIIT increased mitochondrial activity, a cellular process that provides us with energy but declines as we age.
A study published at the end of last year in the Journal of Cognitive Neuroscience found that people practicing 20 minutes of HIIT for only six weeks significantly improved their high-interference memories (that’s the type of memory commonly involved in recognition). Although this study was based on young people, the lead researcher hypothesized that “we will see greater benefits for older adults given this type of memory declines with age.”
The same study found that HIIT raised levels of BDNF (brain-derived neurotrophic factor) in the brain. We’ll be writing about BDNF in the weeks to come, but all you need to know now is that BDNF, routinely called the Miracle-Gro for brain cells, falls as we age and is linked to premature ageing in rats and to Alzheimer’s, depression and obesity in humans.
The name, HIIT, is terrifying. But all it means is getting a little bit breathless – a short burst of activity where you push yourself harder than normal – followed by a few seconds of recovery. What I love about HIIT is its efficiency. Sports scientists claim that a few minutes of HIIT equate to a much longer period of steadily paced exercise. Michael Mosley talked about HIIT in his recent BBC programme The Truth About Getting Fit. You can see it at http://www.bbc.co.uk/programmes/p05w69pf. He also includes a 5-minute programme of star jumps and squats that can be done in your kitchen.
I’ve been doing Dr Mercola’s 3-minute Nitric Oxide dump (http://www.mercola.com/calendar/2018/fitness.htm), which is a version of HIIT, alternating it with Dr Chatterjee’s 5-minute Kitchen Workout (https://drchatterjee.com/5min-kitchen-workout/). Both were recommended by my chiropractor sister-in-law and both include a mix of movement and strength training.
But please, please start slowly….And always check with your GP before starting a new exercise programme.
Finally, you need to keep going – the study that found exercise could change your microbiome also found that after six weeks without exercise the participants’ microbiomes reverted back.
If you’re still concerned about HIIT, there’s a sensible explanation at http://abcnews.go.com/Health/high-intensity-interval-training-anti-aging-benefits-study/story?id=45981168.
CLOVE-RICH LEBANESE SPICE MIX
I wrote about cloves recently, the richest antioxidant ingredient on the planet. Cloves were widely used in the past, but their distinctive flavour has fallen out of fashion now. So I was thrilled to find a spice mix chock-full of this little dried bud (which is what a clove is).
Cloves need to be artfully paired with other spices to get the right balance. And this Lebanese blend cracks it. Keep a jar in the fridge and we’ll be showing you how to use it in the weeks to come.
PS The mix comes from the cookery book in the picture, one my favourite books of the last two years. Author, Salma Hage, calls it Lebanese 7-Spice Seasoning. In my view Middle Eastern cuisine ranks as one of the world’s great cuisines. Happily, it’s also bursting with nutritional goodness. What more could one ask for?
- 5 tbsp ground allspice
- 3.5 tbsp ground pepper
- 3.5 tbsp cinnamon
- 5 tbsp ground cloves (yes!)
- 4 tbsp grated nutmeg
- 4 tbsp ground fenugreek (I omit this as I can’t grind the seeds in my pestle!)
- 4 tbsp ground ginger
Mix thoroughly and store in an airtight jar. This make a large supply, but you can always halve the amount or gift jars to friends.