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(1/13) Biomechanical analysis w motion capture is a fantastic tool, but will never be "the solution." In @FransBoschBook Anatomy of Agility, Bosch laments, "There is so little & #39;bio& #39; in biomechanics." @FerreePt @MartijnNijhoff @BartHanegraaff @paulvenner @ShakeyWaits @RonWolforth
(2/13) We& #39;re not made of metal rods & rivets. Mocap merely reports the physics of the forces the sensors record. It can& #39;t account for the critical dynamics of motor control & coordination. @fbr_wes @AlanK_FBR @newtforce @Pitching360 @O_kadey @acovers22
(3/13) Newtonian physics can infer stress on connective tissue but can& #39;t measure it directly. 70 Nm of torque may be devastating to one athlete& #39;s UCL and completely innocuous to another. @108_Performance @OnBaseU @NunzioSignore
(4/13) In theory, if the muscles are coordinated, synchronized and synergized, you might not need a UCL. The UCL should be the last line of defense. If your UCL is providing the bulk of the stability in your elbow,you& #39;re probably already in trouble. @jaegersports @GowagsKyle
(5/13) Motor control & coordination throughout the entire kinetic chain is critical for attenuating stress and enhancing performance. Using motion capture to compare day-to-day stresses for the same athlete may be of some value, especially in rehab. @coachgambetta @SLarkin04
(6/13) But, comparing a single athlete to ranges of norms can be misleading."Science hates variability, and humans are infinitely variable." @EdFehringer @WesWesj @24jono @FullReps_Swanny
(7/13)As explained by Turvey, et al in 2003, http://floridabaseballranch.com/Turvey ">https://floridabaseballranch.com/Turvey&qu... "What we call background noise is treated as random variability in most research, the nuisance factor in factorial experiments." @FCorral34 @SteffanJones105 @MovementMiyagi @TylerYearby @TXBaseballRanch
(8/13) "We argue ... that background noise reveals the kind of dynamics that coordinate the mind and the body. Background noise contains the dynamical signature of purposive behavior." @The__BDG @drsosterer @GoWagsBret @wesJwes @JWonCATCHING @AndyMcKayHG @Evan_Wise
(9/13) Noise science can never control: 1. White Noise - due to motor variability (degrees of freedom, degrees of constraint) 2. Pink Noise -cognitive contributions/distractions due to attention, motivation, CNS fatigue, etc. 3. Brown Noise - random Brownian Motion of molecules
(10/13) Science/statistics attempts to dilute variability with large sample sizes. However, according to Turvey, "Larger samples of the same data yield larger variance estimates up to the limits of the system. This possibility runs against the grain of all conventional analyses.
(11/13) In the 1500s topography was emerging, but map makers quickly found that the larger the area they attempted to map, the less accurate they became. Combining local maps did not accurately represent the entire territory. It& #39;s the same in the body and in movement science.
(12/13)The sum of the parts does not equal the whole. If we& #39;re going to help our players, we must train movement. not mechanics. Coaches have to coach. And, we must remember that when it& #39;s all said and done,it& #39;s the relationship with the player that matters the most. @brentsrom6
(13/13) @TheLesNozzle @OAITraining @maximized_BSB @tomhousesports @EricCressey @fastballusa @throwzone @eminsh @acreel34 @OAITraining @cutternationbsb @TewksHitting @SwingRehab I-right wiggle 34 switchblade for the state championship. I love all ya& #39;ll. 
https://abs.twimg.com/emoji/v2/... draggable="false" alt="🙏" title="Folded hands" aria-label="Emoji: Folded hands"> tag anyone I forgot.
