More specifically, it relates to {HEAD ~ an exercise apparatus} for use during crawling movements of the body and designed to recover {TAIL ~ a skeletal range} of motion and abdominal and back muscle tone balance, as well for muscle strengthening 
More specifically , it relates to { HEAD ~ an exercise apparatus } for use during crawling movements of the body and designed to recover { TAIL ~ a skeletal range } of motion and abdominal and back muscle tone balance , as well for muscle strengthening
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH