三頭筋
abdominal
abdominal muscle
abs
adult
aerobics
biceps
body building
body building exercises
body conscious
bodybuilder
bodybuilding
calf
calves
caucasian
fit
flexing muscles
guy
gym
handsome
health and fitness
health club
healthy eating
healthy lifestyle
human leg
human muscle
indoors
leg
light
male
man
muscular build
posing
power
quadriceps muscle
relaxation exercise
sport
sports and fitness
sports clothing
sports training
strength
strong
symmetry
the human body
weight training
young man