activity
arm
athletic
background
black
bodybuilder
build
building
care
carpal
crosstrainer
device
equipment
exercise
exerciser
expander
expander isolated
expander training
flexor
force
green
grip
gym
hand
hand expander
handle
health
healthcare
healthy
isolated
manual
metal
muscle
muscular
nobody
object
plastic
power
practice
resistance
single
special
spring
spring mechanism
steel
strength
train
training
training device
white