英文關鍵字
pedal
feet
heel
leg
walking
slide
step
shoes
male
elliptical
sole
cross
foot
cycle
rhythm
sneakers
turn
playing
sports
trainer
slip
fitness
sportsman
roll
floor
simulator
home
part
speed
push
leather
action
insulation
adjustable
stair
motion
driving
endurance
person
limb
detail
cardio
move
manage
routine
strength
weight
energy