20181102 04 FISA Youth Conf Draper Does ‘Ergo-power ...€¦ · Coaching tool PRO’s/ CON’s :...
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FISA YOUTH COACHES CONFERENCE 1 st –4 th November 2018 - Bucharest, Romania Conny Draper, PhD Applied Sports Biomechanist [email protected] Does ‘Ergo-power’ Always Equal a Faster Boat? Performance On-water Ergo
Transcript of 20181102 04 FISA Youth Conf Draper Does ‘Ergo-power ...€¦ · Coaching tool PRO’s/ CON’s :...
FISAYOUTHCOACHESCONFERENCE
1st – 4th November2018- Bucharest,Romania
ConnyDraper,PhD [email protected]
Does‘Ergo-power’AlwaysEqualaFasterBoat?
Performance
On-waterErgo
(Nov,.2017)
Training tool PRO’s/CON’s:l Veryaccuratefeedbacktoolonrowingintensity
l Allowsprecisetrainingofphysiology
l Stabletrainingenvironment(independentonweather&waterconditions)
Introduction tool to the sport PRO’s/CON’s:l Usefultointroducenewrowerstothesport
l Avoidtoomuchintheearlyphases.Itsboringandreinforcesbadhabits
l Kidslovetodo‘teamraces’ontheergoover500morso.(Changingteammembers)
Technique tool PRO’s/CON’s:l Usefulforbasiccomponentsofrowingtechnique
l Createunderstandingofteachingthedifferencesbetweengoodergometertechniquevs
l Danger!! Itispossibletorowonanergowithacompletelyfalsegrip.Thisiswhymanyyoung
scullershaveanincorrectgripintheboat!
(i.e.…hangingonwiththelast2jointsofthefingersispossible.Intheboat,thatmakesit
impossibletorollthebladeoutintothefingers….andsomanyathletesneedabigwristmovement
toturntheblade)
WHYErgometerorWHYnot?CollectionofcommonPRO’s/CON’sthoughts&experiencesfromcoaches/SportSciencesupportteams…
Coaching tool PRO’s/CON’s:l Alwaysuselowestdragfactor,unlessit’saspecificexercise
l Theergoistoooftenusedasa‘babysitter’foroddnumbersofathletesorpeoplewhocomelate.Often
bettertogetthemtorunormaybecomeinthemotorboat.
l Gymnastsoftensay“foreveryincorrectrepetition,youneedtodoapprox.7correctonestowriteover
thebadone”
l Ergometercalculationcanmisguideathletestowardswrongtechniquetoachievehigherergscores(can
badlyaffecton-watertechnique)– andoverusecancauseinjuries
Selection tool PRO’s/CON’s:l Strongperformanceindicatorforcompetitiveon-waterrowing,HOWEVER– VERYcontroversialtobase
selectionpurelyonergometerscores(youcaneasilylosecrucialfastboatmovers&racers)
WHYErgometerorWHYnot?(2)CollectionofcommonPRO’s/CON’sthoughts&experiencesfromcoaches/SportSciencesupportteams…
D
À
C
B D
À
B
C
during On-Water Rowingl Rower moves lighter boat
relative to himselfl Oar works as a ll type lever
(pivot point is on the end)
during Ergometer Rowing:l Rower moves his body relative
to the stable supportl “Oar” works as a l type level
(pivot point is in the middle)
BiomechanicalDifferenceErgometer vs.On-Water Rowing(1)
during On-Water Rowingl Scull/Sweep: Leg drive linearl Sculling: Body swing: translational (linear)
Handle pull: rotationall Sweep: Body swing: rotational
Handle pull: rotationall Stretcher - handle force: 30% smaller handle force
due to the gearing factor
during Ergometer Rowing:l Leg drive linearl Handle pull/ Body swing translational
l Stretcher & Handle force: similar magnitude
BiomechanicalDifferenceErgometer vs.On-Water Rowing(2)
(Kleshnev,.2015)
BiomechanicalDifferenceErgometer vs.On-Water Rowing(3)
(Kleshnev,.2015)
BiomechanicalDifferenceErgometer vs.On-Water Rowing(4)
(Kleshnev,.2015)
BiomechanicalDifferenceErgometer vs.On-Water Rowing(4)
(Kleshnev,.2015)
Handle force:l Erg approx. 34-40% higher
Max Forcel Erg approx. 25% higher Ave
Forcel On-water: wider F-profilel On-water: earlier Max forcel On-water: earlier peak force
Handle velocity:l Erg (stationary): 10+%
shorter stroke lengthl On-water: 18-20%
higher velocity
Seat (leg) velocity:l Erg (stationary C2): 5%
longer leg drive than RP
Trunk velocity:
ConnyDraper,AppliedSportsBiomechanist,[email protected]
Strokelength(incl.Catch/Finish(absolute/effectiveSL)
Catch
Catch(eff.)
Finish(eff.)
LegdriveBodyswing
Armdrive
Finish
Min.
oarangle Catch
Beginning
ofdrive
Middle
ofdrive
End
ofdrive Finish
Max.
oarangle
RowingstrokeProfile:Movementphasevs.gateforce- angleCurvecharacteristics
M4- Example:2athletes (sameboat)with differentrowing technique profiles @SR36
ConnyDraper,AppliedSportsBiomechanist,[email protected]
StrokeLength(incl.catch/finish(absolute/effective)
Finish
Men’s Sweep Comparison: 5min SRRP pieces
www.peachinnovations.com [email protected]
School boys (JM4+)Sweep
Collegiate Rowing (M8+)Sweep
National Team (M8+)Sweep
SkillLevelComparison:School– Collegiate– Elite(MENSWEEP)
Women’s Sweep Comparison: 5min SRRP pieces
www.peachinnovations.com [email protected]
School girls (JW4+)Sweep
Collegiate Rowing (OW8+)Sweep
National Team (W8+)Sweep
SkillLevelComparison: School– Collegiate– Elite(WOMENSWEEP)
Very accurate feedback on rowing intensity (precise physiology training)Winter training tool…
BiomechanicalDifferenceErgometer vs.On-Water Rowing(3)
‘Does‘Ergo-power’AlwaysEqualaFasterBoat‘
ConnyDraper,PhD [email protected]
Thankyouforyourattention!
2018FISAYOUTHCOACHESCONFERENCE
1st – 4th November2018- Bucharest,Romania
