The "30 minutes a day" rule comes from the current U.S. government exercise guidelines, which recommend that people engage in 150 minutes of moderate-intensity aerobic activity per week.
Ihe 'Nkeji 30Otu iwu 'sitere na nduzi gọọmentị US ugbu a, nke na-akwado ka ndị mmadụ tinye aka na 150Nkejiarụ ọrụ aerobic na-arụ ọrụ kwa izu.