وقتی که سر به سمت جلو خم می‌ شود

وقتی که سر به سمت جلو خم می‌ شود

خم شدن سر به جلو

وقتی که سر به سمت جلو خم می‌ شود برای 15 درجه شیب 12 کیلوگرم، برای 30 درجه 18 کیلوگرم، در 45 درجه 22 کیلوگرم و در 60 درجه 27 کیلوگرم نیرو به گردن وارد می شود

8 نظر

  1. حوااحمدیحوااحمدی:

    باسلام واحترام مطالب بسیار مفید وارزشمندوکاربردی هستند ممنون از اینکه به فکر آموزش ونهایتا تامین سلامت جامعه هستید .

    • حوااحمدیمحمود زارعی(mahmoudz) :

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