{HEAD ~ An exercise device} for use in dystrophy therapy employs {TAIL ~ a compression spring} which provides an adjustable resistance force 
{ HEAD ~ An exercise device } for use in dystrophy therapy employs { TAIL ~ a compression spring } which provides an adjustable resistance force
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH