FISAYOUTHCOACHESCONFERENCE

1st – 4th November2018- Bucharest,Romania

ConnyDraper,PhD AppliedSportsBiomechanistconny.draper@gmail.com

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,conny.draper@gmail.com

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,conny.draper@gmail.com

StrokeLength(incl.catch/finish(absolute/effective)

Finish

Men’s Sweep Comparison: 5min SRRP pieces

www.peachinnovations.com info@peachinnovations.com

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 info@peachinnovations.com

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 AppliedSportsBiomechanistConsultantconny.draper@gmail.com

Thankyouforyourattention!

2018FISAYOUTHCOACHESCONFERENCE

1st – 4th November2018- Bucharest,Romania