英文關鍵字
pedal
feet
barefoot
heel
walking
step
male
elliptical
cross
foot
rhythm
turn
playing
sports
trainer
leg
simulator
home
fitness
push
sportsman
cycle
quarantine
epidemic
speed
movement
limb
adjustable
manage
sportive
health
up
cardiovascular
practice
exercise
athlete
gymnastic
lever
machine
run
part
rear
effort
zoom
sole
coronavirus
insulation
routine
work