We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
We've all had it. It only lasts about 24 hours, but it is miserable and not treatable.
It's not treatable because the Staph bacterium (Staphlococcus aureus) produces a toxin which causes the physical reaction. The toxin is the problem, not the Staph. Staph is everywhere.
Food poisoning is avoidable by proper food management. Specifically, don't leave susceptible foods out of refrigeration for more than 2-3 hours. Yes, I know, we all do sometimes but it's not "best practices."
My last food poisoning incident was from a shrimp dish.
So when there was once a bimodal distribution of mortality - infancy and youth, and then old age, now there is only one. All of those deaths in youth skew average or median statistics to the point of meaninglessness. Antibiotics and immunization have made a huge difference.
Regarding infant mortality, it is difficult to compare the rates across countries because it depends on at what point the medical system declares an infant viable. In the US, where almost every infant is viewed as possibly viable, many more infancy deaths are named as such than in other places. It's the same phenomenon that rates Sloan-Kettering (cancer) hospital the worst hospital in the US. Many of their patients do not survive, obviously, despite possibly being the best cancer center in the world.
After the huge effect of public health, immunization, and antibiotics, medical advances have accomplished remarkable things in improving the function and independence of the elder cohort even though I have seen no stats to measure and compare this. In some ways, this is more valuable than life span alone. A generation or two ago you never saw people in their 80s playing tennis, skiing, or hiking up Mt. Washington. Now, it's common in the US (not so much in Europe).
The blessing we all have now, whether we are the half who live past the mid-late 70s, or the half who do not, is the opportunity to live what we're given with as much richness and independence as possible.
Your internist might give you a Cardiac Stress Test every few years to check your cardiopulmonary function, but other than that never a physical fitness evaluation beyond, maybe, a body fat composition. A very thorough physical exam might include an SF-36. This is not used often enough. (It is used in $5-10,000 "Executive Physicals," but that is often because companies take insurance on the functioning of their essential execs.)
The reason doctors don't do it is because your physical fitness at any age is your problem, not his or hers. OK, they will advise "exercise," but they know you won't do much of it, or "watch your diet" but they know you will do no more watching than looking at what is on your plate.
Serious fitness evaluations are done by the military, police, fire departments, etc. For us civilians, the only people who will give us a serious fitness evaluation are skilled fitness trainers. Trainers tell me that 3/4 of their new clients are in terrible shape. That's why they are there. About 1/4 are in decent condition, but want to get to a higher level of fitness.
Fitness evaluations include basic measures of cardio function, endurance, strength, agility, and balance. The Mayo Clinic offers this do-it-at-home fitness evaluation.
Regardless of age or level of condition when you decide to get serious about conditioning, The Maggie's program of HIIT cardio, endurance cardio, calisthenics, and weights (plus proper nutrition for a svelte physique) addresses all of the areas of fitness.
Avoid sunburn, especially in youth. Problem is, youth don't avoid sunburn.
In any event, getting some unfiltered sunshine is healthy, about 20-30 minutes/day, and a nice tan seems fine if you have the right skin for it. One view: Is sunscreen the new margarine?
Pediatricians these days are complaining that the kids are sun-deprived, due to sun-phobia of parents.
Keto-style nutrition (ketogenic) is only for people whose habits and life-styles tend towards excess fat deposits. There is no reason to fuss with your nutritional habits if you are in good shape and good conditioning. Food is not medicine - but if you lift heavy 2-3 times weekly, keep the protein up for muscle repair.
All "keto" means is that you are burning fat. Burning fat is difficult, because your body wants to hang on to it and exercise does very little for that at ordinary intensities and durations.
An interesting side effect of ketosis is that appetite tends to be reduced and energy increased. For people who are serious about it, you can buy Keto-strips to check your urine. That will instantly tell you whether you are burning fat or not.
If overweight, you probably have some degree of insulin insensitivity, sometimes termed "pre-diabetic" at some point. A keto nutritional habit can correct that, but remember that if you have ever been fat, your body will want to restore it back to where you set your highest weight. Fat cells are as greedy as governments and they never forget.
Your basic physical architecture is a product of a genetic potential, a genotype. Your genetic potential (design) is effected to some extent by environmental influences: intrauterine nutrition, nutrition during growth, disease, physical activity during growth, and so forth. All the same, your genetic potential can not be exceeded because it is pre-programmed.
What do I mean by basic physical architecture? I mean things like basic body structure: height, bone lengths and widths, and number of muscle cells and their distribution (yes, you are born with all of the muscle cells you will ever have, and these vary a good deal between people).
As an adult over age 17- 21, your life-long basic physical foundation is complete. As with your IQ, personality strengths and weaknesses, athletic talents, what we do with our given physical architecture after that point is up to us. A good trainer, a physical therapist, or a sports physician can see through our appearance and phenotype and get an idea of our basic physical architecture and our potential for development of what we are.
Our naked physical appearance today may or may not tell us much about our basic architecture, because it might be hidden under layers of fat or simply unmanifested by lack of stressors and demands. In underweight people, it can be concealed by underdevelopment of potential.
It's common to talk about endomorphs, mesomorphs, and ectomorphs, but that is simplistic because everybody is built differently. The length of your femur, for just one important example.
Do these things matter in general fitness efforts? Not too much. Do they matter in physical training? Yes, because the architecture sets limits on, and offers opportunities for, what can be achieved. Do they matter in athletic potential? Certainly, but it depends on the level which is aspired to.
Not only that, but we now know that dietary fat appears to have minimal to no correlation with cardiovascular disease in normal people. We do know that being even mildly overweight is a significant risk factor for cardiovascular disease (along with breast cancer, arthritis, diabetes, Alzheimer's, etc etc.).
Addendum: If you are working on body-building with heavy weights 4 days/wk (few if any of our readers are doing that), you need to eat a lot of everything you can get your hands on just to maintain your weight, and even more to build muscle mass.
Why do people with any fat stores ever feel hungry, or eat anything at all, considering they may have 1-5 month's worth of energy stored as fat? (We term the hunger experienced by overweight people "False Hunger," because it is.) Except in the truly malnourished or extremely fit, low body-fat athletes, hunger is rarely a signal of an energy deficit or of any nutritional need.
Think about it. Even normal-weight (neither overweight nor underweight) people carry 8-10 weeks of energy stored in fat if they can only access it.
You can consider appetite in the pudgy or overweight, not to mention the obese, to be a design flaw based on the hunting and gathering, and, earlier, just plain gathering condition of human existence, same as the other great apes who only become overweight in captivity. Agriculture and food abundance, along with sedentary life, exposed the design flaw for people who overnourish themselves. Of course, physical inadequacy is another side effect.
The idea that government knows how we ought to eat is absurd. Many of us assume that government is stupid, but even your Mom doesn't know.
Nobody can say what a "healthy" nutrition plan is because humans and all higher primates are omnivorous. That means humans can thrive on almost anything as long as it contains sufficient calories to support life. I've seen enough kids grow big and strong enough to play varsity football on peanut butter and jelly sandwiches on Wonder Bread to be convinced of that.
Because of the ambiguity of being omnivorous, everybody has an opinion about what is best. "Clean diet," paleo diet, low-fat diet, high-fat diet, vegetarian diet, vegan diet, Mediterranian diet, bla bla bla. My advice is to eat moderate amounts of everything. Small meals are best for health, fitness, energy, and mental clarity.
With a few comments:
- If overweight and if you do not want to be, cut the carbs and cut the volume. Don't be a pig. If fat and happy, that's fine with me because I am neither your doctor, parent, or spouse. - If you exercise hard daily, especially with heavy weights, keep daily protein up to around 80-90 gms/day for adequate muscle repair, and eat some sugar - Coke, candy, fruit - before the workout. - If you hate vegetables, take a multivit. If you think fruit is "healthy", show me the data. (There is none. Fruit is dessert or a quick sugar fix.) - If you worry about overly-high bad triglycerides, discuss with your doctor. Bear in mind that elevated cholesterol does not appear to correlate with heart disease (except in diabetes and familial hypercholesterolemia). Your doc knows that.
Since a study came out a few years ago, based on BMI, that heavy people live longer and healthier than thinner people, many heavy people applauded the news.
In fact, it turns out that higher muscle mass correlates with reduced risk of illness and death. (Well, risk of death is 100% but they mean sooner rather than later.)
A meaningful gauge of being overweight for your build and fitness is your Body Fat percentage. The simplest way to do this is to have somebody use the body fat caliper method on you. That does not measure intra-abdominal fat deposits, but it assumes a correlation. Your doctor's nurse knows how to do that. There are other ways too. (An easier way is to study yourself naked in a mirror.)
This site has two charts, one depicting "ideal" fat percentages based on fitness, and the second based on age. As an athletic female, I like to be around 25-30%. Seems disgusting for your body to be 30% lard, doesn't it? It can be fine for a slender lady, though.
Just for fun, no ab exercises will give you 6-pack abs. Killer abs are all about fat. "Good abs" are visible in men at around 8% body fat, and in women around 12%. Those are either highly-athletic (ie well-beyond "fit" percentages) or otherwise verging on anorectic. I will not recommend any %s lower than those, even for models and ballet dancers, and, generally, feel that those %s are too low for regular fit people. 20% is fine for a regular fit male who plays sports and works out.
Below the fold, photos for comparison of men and women with varying body fat percentages.
Since it was a bit of a hiking weekend, I decided to consider the topic from a health and fitness standpoint rather than from a fun and adventure standpoint. What I will say generally applies to all aerobic activities (ie rowing, biking, swimming, etc).
- First off, most articles we search discuss these topics in terms of weight loss and calorie-burning. That is nonsense. Unless you devote several hours/day to these things with a carb-restricted diet, they will do nothing for your fat. Let's take that off the table and accept that body fat is about nutritional choices and nothing else.
- Second, we are talking about things which are often referred to as "cardio" fitness and cardio training. They really are not cardio training without the high heart rate which can not be attained for healthy people through walking or jogging. Similarly for skeletal muscle strength. For general endurance, good. True "cardio training" entails repeated anaerobic sprints of almost any activity (often termed HIIT. You can do HIIT with kettlebell swings, wall ball slams, road-sprints, sprint pool laps, or anything that stresses the heck out of you for 30-60 seconds). 15-20 minutes (including rests) of HIIT accomplishes far more for cardio fitness than an hour of aerobic activity.
Third, recreational hiking, jogging, swimming, biking, rowing are more the happy rewards of fitness than stimuli to increased fitness. I can hike 10 miles because I am somewhat fit, not to become fit. Nonetheless, they are the sorts of things that distinguish an "active" person from a "sedentary". "Sedentary" roughly refers to a person with less than 8-10 hours/week of intentional, vigorous physical activity (not strolling, or housework or easy stuff), or less than 6 hours of high-intensity physical activity/week. A good measure of "high-intensity" is that you are short of breath most of the time.
- Except for newbies, the elderly, or the infirm, the above relatively low-intensity aerobic activities (I hesitate to term them "exercise" because they lack the high exertion component) are just fine for maintaining mobility and endurance for casual activities. They do not increase fitness once you can do them. Any healthy person can walk 10 miles, jog 3-5 miles, or swim a mile of laps. Still, aerobic endurance is a handy thing for life enjoyment.
- Walking and jogging put the same lower-body muscles to use. Both are easy on the hamstrings, which can lead to a muscle imbalance if jogging is your only activity. Anyway, these are not strength-builders or meaningful cardio training (because there is not a high-enough cardio stress once you have adapted to them).
- Jogging on cement or asphalt on a daily basis will come back to your joints at some point. For "long, slow", once/week is enough for a fit person who works out daily in other ways along with recreational physical activities such as sports. Running is speedy jogging with a long stride and sprinting is sprinting.
Magical thinking about food and nutrition is pervasive in wealthy parts of the world where nutrition is over-abundant and biological knowledge minimal. The classic example in the US is Whole Foods - organic non-GMO foods and supplements for the rich. A scam, like this one:
The old idea of the virtue of a low-fat diet is in the dustbin of history. There is no correlation between dietary fats and heart disease. However, there is a high correlation between being overweight and heart disease - especially "pear-shape" (abdominal) fat. Indeed, being overweight or fat correlates with many diseases: heart disease, high blood pressure, diabetes, several cancers including breast cancer, arterial disease, joint ailments and arthritis, Alzheimer's - the list goes on and on. Humans were not designed for dietary abundance, but for caloric scarcity.
That is about dietary fat. If you are concerned about hyperlipidemia, let your doc treat it if it concerns you. There are many alternatives for that.
To lose body fat, only a low carb diet works. Your body converts all carbs to sugar and then stores the excess sugar as fat. Dietary fat doesn't make people fat. Everybody knows what carbs are: sweets, fruits, dessert, root vegetables, juices, beer, grains, grain products eg pasta and bread, beans, corn, etc. The comfort foods.
To gain or maintain weight, eat plenty of everything including apple pie, ice cream, beer, Big Macs - and 70-100 gms of protein daily if you do heavy exercise (eg weights).
Can you lose weight with an hour of daily exercise? It depends on the intensity of that hour, but it's not a realistic effect for most. Still, it is worth doing for countless other good reasons including mental well-being and energy. Intense exercise tends to reduce appetite, so there's that too.
Rats can do it, but adult humans have no capacity for growing new brain nerve cells (neurons). The idea that humans could do that (with exercise, etc) has been a hot topic for over a decade.
We know many scientific studies are false. But we usually find this out one-at-a-time. This – again, assuming the new study is true, which it might not be – is a massacre. It offers an unusually good chance for reflection.
And looking over the brutal aftermath, I’m struck by how prosocial a lot of the felled studies are. Neurogenesis shows you should exercise more! Neurogenesis shows antidepressants work! Neurogenesis shows we need more enriched environments! Neurogenesis proves growth mindset! I’m in favor of exercise and antidepressants and enriched environments, but this emphasizes how if we want to believe something, it will accrete a protective layer of positive studies whether it’s true or not.
I’m also struck by how many of the offending studies begin by repeating how dogmatic past neuroscientists were for not recognizing the existence of adult neurogenesis sooner...
One might think that there is an epidemic of Alzheimer's deaths, and those who seek funding for Alzheimer's will tell you so. The reality is that the rising deaths from Alzheimer's is a measure of medical success in dealing with the other ailments which have tended to kill people sooner than Alzheimer's.
We'll all die from something. Eventually something gives out, even the brain. Carpe diem, and try not to have a family history of Alzheimer's.
Whether scrawny or pudgy, challenging exercise makes a person more aware of his/her physique by pushing its limits. Yes, a good conditioning class is the best wake-up call for most people, but so is 3-5 minutes of jumping jacks or jump rope.
The scrawny learn that they need to push themselves to build themselves up for strength and endurance, and the pudgy are forced to realize how much their pudge slows them down. Therefore they are motivated to pay more attention to their nutritional habits so they can keep up.
A physiological factor is that an hour of daily exertion tends to reduce appetite in pudgy adults. Exertion means "hard to do." Scrawny people may have to force-feed themselves somewhat. Athletic and physically-active people tend to consume what they need, not so much what they want.
So that is how an hour of daily cardio, calisthenics, and weights helps get people into fighting shape. The exertion itself is a minor factor but it is a motivator. Physical maintenance.
Keto-style nutrition (ketogenic) is only for people whose habits and life-styles tend towards excess fat deposits. There is no reason to fuss with your nutritional habits if you are in good shape and good conditioning. Food is not medicine - but if you lift heavy 2-3 times weekly, keep the protein up for muscle repair.
Your basic physical architecture is a product of a genetic potential, a 
Since a study came out a few years ago, based on BMI, that heavy people live longer and healthier than thinner people, many heavy people applauded the news.
Since it was a bit of a hiking weekend, I decided to consider the topic from a health and fitness standpoint rather than from a fun and adventure standpoint. What I will say generally applies to all aerobic activities (ie rowing, biking, swimming, etc).