英文關鍵字
pedal
feet
barefoot
heel
leg
walking
step
male
elliptical
cross
foot
cycle
rhythm
turn
playing
sports
trainer
fitness
simulator
home
speed
push
sportsman
quarantine
epidemic
movement
limb
adjustable
manage
human
force
sole
footprint
people
ankle
back
indoor
rear
cardio
motor
cardiovascular
muscular
health
exercising
action
part
place