三頭筋
abdominal
abdominal muscle
abs
adult
aerobics
athlete
biceps
body building
body conscious
bodybuilder
bodybuilding
caucasian
chest
fit
flexing muscles
guy
handsome
health and fitness
healthy eating
healthy lifestyle
human muscle
indoors
lifestyles
male
man
model
muscular build
posing
power
sport
sports and fitness
sports clothing
strength
strong
symmetry
the human body
young man