It is not a sunnah taught to us by the Prophet salla Allahu alaihi wa sallam but rather it was encouraged by Omer, may Allah be pleased with him and it applies for both men and women with certain guidelines of course.

I have heard that it is sunnah to teach boys swimming, archery and horse riding; is it same for girls? And even for girls I have heard that prophet Muhammad said to teach girls sewing? Is it authentic?