But this time with a weight loss angle.
See my past posts: Protein, age, and muscle loss. and Want to keep muscle after 40?: Eat all the protein and lift all the things
It’s a thing that I care about.
And I hate the idea that some people, especially women, might welcome it, because it means weight loss.
From an article in the Globe and Mail, by Alex Hutchinson, We need better guidelines to deal with age-related muscle loss.
“You might be relieved to hear that the creeping weight gain of middle age – a pound or two (0.5 to 1 kilogram) a year starting in your 20s, on average – eventually grinds to a halt. By the time you’re in your 50s, you’ll typically start slowly shedding weight. Don’t celebrate yet, though. There’s a good chance that the weight you’re losing is muscle – precisely what you need to hang onto to stay metabolically healthy and independent into old age. “
Why does this happen? Partly because we exercise less but that’s not the whole story. The article talks about ‘anabolic resistance.’ Our bodies no longer, as we age, respond the same way to strength training and protein. Like insulin resistance in diabetics our bodies no longer respond as effectively to protein and to exercise. We need more of both, not less, as we age.
There’s also a concern about the kinds of protein and when we eat them.
Writes Hutchinson: “It’s not just how much you eat. There’s some evidence that spreading your protein across three meals triggers more muscle growth than just downing a massive steak at dinner. And protein quality matters too, with certain amino acids such as leucine playing an outsized role in muscle growth. That means animal proteins such as meat, fish, eggs and dairy tend to pack a bigger punch than plant proteins, although Oliveira emphasizes that variety is also important.”
It’s a challenge to eat the 1.0 to 1.5 g of protein per kg of body weight per day that’s recommended.
What about exercise? What should we do to stave off muscle loss?
“The overall picture from existing research is that full-body resistance training with loads that get progressively harder over time, two to three times a week, is optimal for older adults. One study published last year found that two harder workouts plus one easier one produced the best results, perhaps because older strength-trainers simply couldn’t recover quickly enough to do three hard workouts each week.”
See you at the gym! Maybe we can go for a protein shake after?
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