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Scientists Find Physically Demanding Jobs Are Linked To Greater Risk of Early Death (metro.co.uk)
An anonymous reader quotes a report from Metro: Researchers in the Netherlands claim that a "physical activity paradox" exists, where exercise may only be good for you if it's done outside of your job. Manual laborers may be physically active all day but that doesn't actually help them. In fact, the research claims that it might actually increase their risk of dying early. "While we know leisure-time physical activity is good for you, we found that occupational physical activity has an 18% increased risk of early mortality for men," says Pieter Coenen, public health researcher at UV University medical centre in Amsterdam. "These men are dying earlier than those who are not physically active in their occupation."
He says that it's all down to the type of exercise you do in your spare time, versus occupational physical activity. When you choose to exercise, you can take rest periods when you want -- something that often may not be available to you if you're working on a building site (for example). The research combined results from 17 studies, dated between 1960 and 2010 -- looking at data on almost 200,000 people. The study has been published in the British Journal of Sports Medicine.
He says that it's all down to the type of exercise you do in your spare time, versus occupational physical activity. When you choose to exercise, you can take rest periods when you want -- something that often may not be available to you if you're working on a building site (for example). The research combined results from 17 studies, dated between 1960 and 2010 -- looking at data on almost 200,000 people. The study has been published in the British Journal of Sports Medicine.
It seems like an important detail missing from the article is what the causes of death are that increase for the more physically active jobs. Are they dying more from natural causes, or accidents or something else?
An obvious hypothesis for a potential cause of early death would be if the higher physical activity jobs had much higher accident rates, since a lot of the jobs that come to mind involving a lot of physical activity have more obvious workplace dangers than someone working at a desk job. For example, it seems a lot more likely for a construction worker or a roof cleaner to fall to their death than it would for a programmer, and the path of causation would be due to the particular type of physical activity rather than the job being more physically active.
This study seems to be really focused on the cardiovascular effects, but it seems like there could be lots of potentials for causation beyond the one they are focused on, and it's not obvious what their controls were. The generalized increased risk of mortality numbers seem like they may be less informative than focusing on more specific numbers for particular health risks and causes of death, though the overall numbers are useful for life insurance underwriters.
The university in question is the "Vrije Universiteit Amsterdam" or "VU Amsterdam", so not "UV" as the summary now says. Specifically it's the "VU University Medical Center" (https://www.vumc.com/).
Ever heard of over-training? Imagine doing that every week for 20 years.
Having experienced over-training personally (I used to be a D1 college athlete) I can state with confidence that very few jobs even among physically demanding ones require the sort of output that would result in over-training symptoms. Stress injuries and wear and tear yes. Extreme fatigue even. But over training requires more output than most people ever will get to even in a physically demanding job. It requires exceeding your body's ability to recover. If you are able to do a job for 20 years you are not in an over-trained condition - you would be in the hospital LONG before then. I understand where you are going with your argument and you are quite right that some jobs can take a tremendous physical toll on the body so I can see what you mean. But rarely in the form of what might be called over-training if we are being technically correct. There are exceptions of course but they are the exceptions that prove the rule.
About the only people who come close who aren't poorly paid laborers are pro athletes. How many pro athletes can you think of who don't retire well before they turn 60?
Terrible analogy. Pro athletes typically retire for one of two reasons. 1) Wear and tear on the body including injuries or 2) Declining physical abilities due to age. A pro athlete is one of the very best in the world at their chosen sport and even the best and most fortunate of them aren't going to be able to play at the highest levels much beyond age 40 in any sport and some sports retirement comes much earlier. The reason is that while they might still be very good compared to you or me, their bodies simply cannot perform at the high level necessary to be among the very best in the world. They slow down physically and simply get passed by younger fresher athletes. Age does that to all of us sooner or later. In a skilled trades or other physically demanding jobs you do not need to be among the peak physical performers in the world to still be economically valuable to your company.
1. It's a meta-study, so they grabbed data from a variety of other studies, ie the data had to be "massaged" to get it to line up properly
2. It only found a difference in men, not women, which is odd
3. There were studies they rejected that showed there was no difference, or an inverse correlation
4. It found an 18% difference, which...
5. Isn't clear if it's significant or not, since they list their confidence interval but not their p-value.
So, yeah, not a slam-dunk finding here.
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