BODYWOORKS
PART 1
Muscle: Your Anti-Ageing Frontline
Did you know the key to living a long and healthy life depends on more than merely avoiding illness? It lies in your muscles.
It’s true. Muscles do a lot more than move you around—they hold the keys to you living the life you had hoped for in the years ahead. And they are more vulnerable than you might imagine.
You may have managed to keep up gym work, cycling, swimming or whatever is your thing, and secretly gloat over how athletic you look or maybe your muscles are now hidden by an extra bit of padding. No matter what’s obvious on the surface or how you might feel, the unseen changes caused by inactivity, age, wear and tear, illness and stress can rob you of muscle minute by minute.
Why is that important?
Muscles do more for you than you may realise. They help maintain every one of your body’s organs, help you avoid type 2 diabetes and ensure your brain is adequately fuelled to coordinate all your activity and keep your mind firing as you’d like it to. Muscles keep blood coursing in your veins to move oxygen, nutrients and fuel through your body. They also help you fight illness and infection and are essential for repair work, from everyday bumps and bruises to tissue, bone and tendon repair after major surgery.
Unfortunately, muscle loss is not always obvious until it has progressed far enough to have disastrous impact on physical and cognitive capacity, so being aware of its significance and working to head off any loss is essential. Medical advances may have managed to conquer illnesses that once claimed lives at a younger age, but making the most of the extra 20 years or so they have given us depends on finding ways to keep your body—especially your muscles—and brain going a lot longer than our grandparents might have needed to.
Generations ago eating meant hunting and gathering, and that meant running, climbing, throwing, digging, carrying really heavy stuff like whole animals, and walking, walking, walking. If you wanted to eat, you had no choice but to keep your muscles working. The hunter–gatherer lifestyle is no longer a career option and we have become far too good at finding ways to do less and less activity, which is bad news not only for our muscles but also for our immune system, our body organs and our brains. Nobody wants to return to the days of scrubbing floors on hands and knees, walking miles to work every day, or living without mod cons, but although these bygone lives seemed hard, they worked muscles as they needed to be worked.
My grandfather was born in the early 1900s. In those days 65 was considered a ripe old age—well and truly time to retire on the old age pension and potter around the house. Nowadays 65 is positively young! People expect far more from their remaining years than the generations before. We want to be able to travel, to get down and dirty with the grandkids, to embrace new technology—Skype, Facebook, perhaps online dating—and maybe take up belly dancing or skydiving.
Grandad had to chop and split wood and carry it up to the house every day just to get a cup of tea in the morning. He had to push a hand-mower across the lawn each Saturday; and if something had to be repaired, out came the hammer, the handsaw, the hand-drill and the manual screwdriver. Today we push a button to boil the jug, push a button to start the mower, which almost drives itself; and we can’t imagine life without the electric drill, the chainsaw and perhaps even the electric nail gun.
Grandma did her washing in the copper, dragging each item out of scalding water with a stick and putting it through a hand wringer. If the sheets dared bunch up too much, the wringer had to be released, the washing unwound from the rollers, and the whole process started again. Then the very wet and heavy load had to be carried out to the washing line. The line was a floppy wire strung across the yard and propped up with long poles that needed to be angled low when Grandma pegged out the washing, then re-angled to hoist the washing higher to avoid dogs and small children playing in the washing as it dried (try doing that with a heavy load of wet washing on a line). She was judged by her good housekeeping and religiously mopped the floors and dragged the carpets bodily out of the house, draped them over the back fence, and beat the dust out of them with a cane carpet beater. She made cakes as light as air using only a wooden spoon, a hand-beater and elbow grease.
It’s ironic: we’ve become so clever in thinking up endless arrays of gadgets and machines to do physical chores for us that we’ve outpaced the way our body systems have evolved. The fact is they still depend on us to keep them functioning well in order to continue to go about their work. I need to go to the gym to achieve the sort of strength and muscle Grandma took for granted.
The older you get, the more important muscles become.
It’s fortunate that there is a lot you can do to keep your muscles up to scratch. Understanding what your muscles need is pivotal, and to do that you need to understand the role of what you eat. None of us want to give up our TV remotes, our washing machines or our electric drills, so we need to find alternative ways to keep the life in our muscles. That means not only staying active and doing exercise that boosts muscle, but also feeding them right, and that’s about changing the focus from eating to avoid illness, to eating to age well.
Most health messages are aimed at the population as a whole and are often about avoiding the big baddies like heart disease. Those same messages need a different emphasis when you are looking to life ahead, beyond your late 60s. Of course it’s still important to do what you can to avoid heart disease and other preventable illnesses—but living well into later age needs to be about more than preventing illness.
What you eat and do as you move beyond your 50s and 60s needs to be about tricking your body into thwarting what its physiology—the body’s processing and functioning—naturally inclines it to do, which is to gradually slow down. Slowing down physiology-wise can mean your body systems not working as well as they once did. Thankfully though, while your muscles are affected by those system changes, they mainly slow down due to underuse but remain able to help you no matter your age, if you help them. Sure, illness can take a toll, but keeping your muscles working, and eating to support them is a pathway to heading off age-related physical and cognitive decline—giving you the power to make the most of the 20 or so years ahead.
To look more closely at how easily the wheels can fall off, consider Joan and Betty:
Joan and Betty did most things together. There was golf, a bit of tennis, plenty of socialising and getting out and about with friends and families. Joan was always just a bit more active and always seemed able to eat yet stay thin, while Betty struggled to keep her weight down most of her life. Both slowed down a bit from their mid 50s, but not enough to cause any concern. Life was good and they felt they’d earned a chance to rest up a bit.
However, as Joan did less she also found herself feeling less hungry, and her meals became smaller. She was conscious of maintaining her health and read up on various diets. Her daughter had recently had success with one where she ate mostly fruit, salads, vegetables and wholegrain foods, with just occasional meats and fish and some low fat dairy foods, so Joan took that on. Her friend Betty just enjoyed her food too much to cut down. She tried to share her friend’s interest in her diet and managed to go along with it some of the time, though not always with the same determination or success.
When Joan lost some weight she wasn’t worried. She felt quite virtuous. Betty didn’t lose any but didn’t gain either, so felt she was doing okay. By 68 they both felt well and were living good, healthy lives.
This all seems perfectly reasonable and appropriately healthy, right? Wrong!
There are some red flags in this picture that may surprise you. They are weight loss, eating smaller meals, and eating fewer high-protein foods. Joan was well intentioned, but while the diet she chose was great for her 43-year-old daughter, it was not the best for her.
Age imposes unique nutritional needs, no matter how well you eat or what you weigh. What Joan and Betty didn’t know is that losing weight when you are older means losing muscle, and that sets you up for poor health ahead. Those smaller meals Joan had been choosing along with less meat and dairy, meant getting fewer essentials, like protein.
Now is the time to review and realign your ideal food choices, even for those of you like Betty, who felt so far from Joan’s lack of interest in food and her ability to gradually lose weight that she might as well have inhabited another planet. Of the two, Betty was actually better off when it came to staying independent and healthy into the future.
That ‘healthy’ diet you might have been trying hard to stick with may no longer be right for you.
We’ll come back to the girls soon—let’s look in more detail at the hidden benefits of body muscle.
Figure 1:
Body muscle helps you in more ways than you might expect. It:
›Supports your immune system so you can fight infection and illness
›Supports repair of wounds and recovery from illness
›Helps you to continue to swallow safely and effectively
›Helps maintain a healthy appetite
›Helps your body use its insulin effectively to avoid diabetes developing or its symptoms worsening
›Helps keep fuel supplied to your brain
›Helps you avoid having an adverse reaction to a medication
›Stops you from falling should you lose balance or miss your step
›Allows you to keep moving around engaging in physical activity
›Supports your joints to reduce the pain of arthritis and maintain flexibility.
WHY MUSCLE IS MORE TO YOU THAN MERELY WHAT MOVES YOU
Your muscles are your reserve supply of body protein.
Why is that important? Because protein is constantly being used to fight illness and infection, do the body’s repair work, keep body organs functioning and help support brain fuel supply.
Every little thing your body has to do every minute of every day means wear and tear on your cells. And every cell in every organ—in your skin, your gut, your blood, as well as all the substances running the systems that keep you alive—has a lifespan. Some have only hours of life, some days, some months before they are replaced. Protein is used minute by minute to address wear and tear, to repair damage and for constant renewal. At the same time it’s helping fight off infection and fuelling your brain—as we’ll see later on.
I eat food, and food contains protein, so what’s the problem?
It’s more about continuity of supply: we don’t eat 24 hours a day, but protein is needed all that time. That’s where the muscle protein reserve comes in.
It’s rather like your car. Once you turn that key, you expect to be able to travel a long way. Your car needs fuel to keep running but you don’t carry the petrol station or the power source around with you for that constant supply. Your car’s fuel tank or battery is your reserve between fill-ups; and muscle is our protein reserve between food fill-ups. Unlike your car, which you can switch off when its work is done, the demand for protein doesn’t stop, even when you are sleeping or relaxing on the couch, and there are always going to be gaps between protein coming in from food.
Protein is released from your muscles to bridge those gaps, which come along surprisingly often: they include the non-eating hours between meals; the times when you are unwell and just can’t eat properly; or if you fast—for medical, religious or other reasons. And there are always days when you just don’t get time to eat the meals you should.
In a car you start with a full tank, travelling along at whatever pace you choose. If you don’t refuel, a time will come when you will just stop. It’s different for your body—it’s not all or nothing. If your protein reserve dwindles enough, all the systems that rely on it start to falter and you face more of a series of steps down towards a slow, grinding halt.
Fortunately, even those of us who don’t look like Mr or Ms Universe are blessed with a start-up muscle supply that i...