Tracking {HEAD ~ the motion} of {TAIL ~ the points} 122 a 122 c may enable a user to reconstruct a model of the motion of the ski in order to give feedback to skiers regarding their weight distribution, velocity, turning technique, timing, stance, positioning and the like 
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Tracking { HEAD ~ the motion } of { TAIL ~ the points } 122 a 122 c may enable a user to reconstruct a model of the motion of the ski in order to give feedback to skiers regarding their weight distribution , velocity , turning technique , timing , stance , positioning and the like
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH