三頭筋
abdominal
adult
athlete
athletic
background
balance
biceps
body
bodybuilder
bodybuilding
caucasian
concept
dumbbell
equipment
exercise
fit
fitness
flexing
gym
hand
healthy
human
indoors
lifestyle
male
man
model
muscle
muscles
muscular
one
people
person
portrait
power
press
silhouette
sitting
sport
strength
strong
train
training
white
working
workout
young