三頭筋
abdominal
abdominal muscle
abs
athlete
attractive
background
biceps
body
body building
bodybuilder
bodybuilding
caucasian
dumbbell
dumbbells
ethnicity
eyeglasses
fit
fitness
flexing muscles
geek
glasses
goggles
gym
health
human
male
man
men
model
muscles
muscular
muscular build
nerd
one
people
person
physique
posing
race
sitting
sport
strength
symmetry
weights
workout
young