For every 20 minutes of sitting, look 20 feet away for 20 seconds.
: Portable guides are designed to be downloaded once and read anywhere—even without an internet connection—making them convenient for private reading. Concise "Cheat Sheets" selka olish sirlari portable
Har doim yuzingizni deraza tomonga yoki yorug‘lik manbaiga qarating. Soyalar yuzni charchagan ko‘rsatadi. For every 20 minutes of sitting, look 20
Hech qachon yorug‘lik manbaiga orqa o‘girib turmang. Yorug‘lik to‘g‘ridan-to‘g‘ri yuzingizga tushishi kerak. For every 20 minutes of sitting