20/01/2022
For mental ans physical health and longevity.... Just go for a walk 🚶♂️🚶♀️🚶💪😊
A recent meta-analysis (PMID: 34417979) analyzed all of the *prospective* studies investigating the relationship between daily step counts and all-cause mortality. Seven studies were included in the meta-analysis, accounting for 28,141 total participants, 175,370 person-years, and 2,310 deaths. The researchers found that rates of all-cause mortality were about 12% lower per 1,000 steps per day (hazard ratio = 0.88; 95% CI = 0.83-0.93). Comparing the lowest step counts to the highest step counts reported in the studies included in this meta-analysis, walking 16,000 steps per day was associated with a 66% reduction in all-cause mortality compared to walking just 2,700 steps per day. Stated conversely, walking 2,700 steps per day was associated with a three-fold greater risk of all-cause mortality than walking 16,000 steps per day.
Just to put those findings in perspective, all-cause mortality rates are ~70-80% higher in smokers than non-smokers, and in people with a BMI of 40 vs. a BMI of 23 (for a BMI of 30 vs. 23, the difference is actually fairly trivial).
This is striking, because people (rightly) criticize smoking, and there's a lot of panic about the "obesity epidemic," but activity levels seem to be more predictive of all-cause mortality rates than either smoking status or BMI.
It’s easy for lifters to fall into the trap of assuming that being in the gym for a few hours per week and maintaining a healthy body composition are sufficient to maximize longevity, despite being relatively sedentary outside of the gym. Dedicated training is great, but there’s no substitute for simply moving more.
Research suggests that adults in the US average ~5,100-6,500 steps per day. The present meta-analysis suggests that getting just 6,000 steps per day is associated with an all-cause mortality risk ~126% higher than the all-cause mortality risk associated with taking 16,000 steps per day.
If you want to live a long time, it never hurts to go for a walk. And, it's important to note, since it's a fairly linear trend, any increase over what you're currently doing is a step in the right direction (pun intended)
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You can read an extended version of this breakdown on Stronger By Science: https://www.strongerbyscience.com/research-spotlight-walking/