Businessmen standing back to back

man stretching arms laughing upwards

Fingers crossed behind woman's back

Fingers crossed behind woman's back

Young man exercising beside river, stretching arms, rear view

Man leaning back on tree

man balancing ball on back

Man standing behind thin screen

Businessmen standing back to back

Low angle view of mid adult man on stairs wearing suit, arms open thowing head back

Side view of woman, hands behind back stretching

Man with arms around woman in back seat of convertible

An illustration of a man stretching his back

Human skeletal system, back view.

Anatomy of female muscular system, back view.

Anatomy of male muscular system, back view.

The human skeleton and muscular system, back view.

Vintage World War II poster featuring a man standing in a shadow with swastika in back.

Back view of human skeleton with nervous system, arteries and veins.

Back view of human skeleton with nervous system, arteries and veins.

Antique Anatomical Illustration (copper engraving) of a male figure in landscape with musculature delineated., Albinus, 1749

Illustration portrait of a young man with hands in back pockets

Side view of woman posing with arms behind her back

Antique Anatomical Illustration (hand colored engraving) of Muscles of the Trunk, Neck and Arms (posterior view)., C. E. Bock, 1879

Man standing, stretching arms behind back, back view