英文關鍵字
treadmill
large
gym
people
trained
walk
action
active
activity
adult
athletic
back
boy
caucasian
class
club
defocusing
distance
endurance
equipment
european
exercise
feet
fitness
foot
gymnasium
health
healthy
human
indoor
inside
jog
jogging
legs
leisure
lifestyle
male
man
motion
practice
shoes
sport
stamina
train
training
wellness
white
workout