Adolescente midiendo los músculos de su brazo y apuntando a su bíceps - Foto e imagen de stock

Teenage boy measuring his arm muscles

Boy using dumbbell weights

Teenage boy looking happy at a tape measure and giving a thumbs up

Handsome little boy demonstrating his muscles

Strong boy that show the muscles

Young caucasian teenage boy with pains in his lower back

Young caucasian teenage boy with pains in his shoulder

Boy measureing his stomach size

Teenage boy using an under arm spray isolated on a white background

Pre-teen boy lifting weights isolated on a white background

A Shirtless 19 Year Old Practacing a Karate Elbow Strike

An overweight caucasian teenage boy showing his stomach while standing

An overweight caucasian teenage boy with a tape measure round his neck

Teenage boy using an under arm spray isolated on a white background

Pre-teen boy lifting weights isolated on a white background

Young caucasian teenage boy waking up in bed

An overweight caucasian teenage boy with a tape measure round his neck

An overweight caucasian teenage boy showing his stomach while standing