Fanny Fern wrote the following back in 1870 in her publication, Ginger-Snaps:
Never apply the word "tomboy" to a girl who is taking healthy and innocent exercise. Are there not mincing misses enough about us, who pervert girlhood by adult nonsense, till the whole head is sick, and the whole heart is faint? Better, a thousandfold, be "tomboys" than such things as these. "Tomboys" have lungs and chests and rosy cheeks, and grow up to be healthy mothers of healthy children. Doctors may not like them, but common-sense and husbands do; though, truth to say, these terms are not always synonymous.
Wise and sound advice then and now; as well as now and then.