D
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Iron
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This is an interesting study which found that balding is significantly correlated specifically with the frequency of low-intensity exercise (defined as exercise that only induces only moderate breathlessness). The associations went away when the exercise intensity was increased to induce more severe breathlessness. In layman's terms this would mean intense cardio, which is known to cause adaptions that lower free radicals and resting plasma cortisol long term.
The association between low intensity exercise frequency and alopecia can be seen in this table:
Unfortunately the survey did not single out weightlifting or resistance exercise in general, which by their metrics would fall mostly into the low intensity exercise category. There are reasons to believe that weightlifting or bodybuilding are especially destructive to hair since they don't induce the same protective adaptations that reduce ROS (free radicals) and in fact lead to elevated resting cortisol alongside some androgenic effects that might contribute as well. If there is interest I will expore a few more studies in my next threads to explain why this might be the case.
Link to the paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5500728/
The association between low intensity exercise frequency and alopecia can be seen in this table:
Unfortunately the survey did not single out weightlifting or resistance exercise in general, which by their metrics would fall mostly into the low intensity exercise category. There are reasons to believe that weightlifting or bodybuilding are especially destructive to hair since they don't induce the same protective adaptations that reduce ROS (free radicals) and in fact lead to elevated resting cortisol alongside some androgenic effects that might contribute as well. If there is interest I will expore a few more studies in my next threads to explain why this might be the case.
Link to the paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5500728/
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