三頭筋
active
adult
arm
arms
athlete
athletic
attractive
back
background
bench
body
bodybuilder
caucasian
dark
doing
dumbbell
dumbbell kickback
equipment
exercise
exercises
fit
fitness
good
gym
hand
kick
kickback
knee
left
lifting
looking
male
man
muscle
muscular
one
person
resistance
shape
sport
strength
strong
studio
training
weight
weights
wellness
workout
young