Cap. 2Cap. 2Biomecânica do Biomecânica do

Movimento HumanoMovimento Humano

prof. L.A.Bertoloprof. L.A.Bertolohttp://labertolo.tripod.com.brhttp://labertolo.tripod.com.br

CinesiologiaCinesiologia

Kines: Latin ==> “movimento”Kines: Latin ==> “movimento” logos: “estudo de”logos: “estudo de” Estudo do Movimento.Estudo do Movimento.

Cinesiologiay==>Anatomia & Fisiologia, Psycologia, Desenvolvimento Motor,

Pedagogia, Biomecânica

S ta tic s-a t res t

-con s tan t ve loc ity

K in em atics-d esc rip tion o f m otion

K in e tic s-s tu d y o f th e fo rces th a t cau se

or ten d to cau se th ech an g es in m otion

D yn am ics-ch an g in g m otion (acce le ra tion )

R ig id B od yM ech an ics

science concerned with effects of forces acting on a system (body)

Why study Biomechanics?Why study Biomechanics?

To understand To understand howhow people can move. people can move.– To To enhance enhance skill performanceskill performance by improving by improving

technique.technique.» elite athleteselite athletes

• USOC, professional sportsUSOC, professional sports

» physical challengesphysical challenges• ACL deficit, CP gait, wheelchair, age-related diseaseACL deficit, CP gait, wheelchair, age-related disease

– To To lower the risk for lower the risk for injuryinjury» Exercise equiment & technique, shoes & surfaces, Exercise equiment & technique, shoes & surfaces,

braces & orthotics, automobiles, braces & orthotics, automobiles, collisionscollisions

Why do we need biomechanics?Why do we need biomechanics?

We don’t teach much, we We don’t teach much, we provide an environment provide an environment where learning can take where learning can take place. place.

– Coach: strategyCoach: strategy

– TeachingTeaching» skills: “farm system”skills: “farm system”

» fitness: CV & strengthfitness: CV & strength

Cater to the converted.Cater to the converted. Serve the skilled.Serve the skilled.

We treat symptoms of an We treat symptoms of an injury, with less emphasis injury, with less emphasis on etiolgy (cause) of an on etiolgy (cause) of an injuryinjury– placebo effect vs true placebo effect vs true

treatment effectstreatment effects

– high rate of reoccurrencehigh rate of reoccurrence

Safety & Performance Trade-Off

Ball comparison, NBA vs WNBABall comparison, NBA vs WNBA

Ave Average Hand/Ht Hand Ball hand/ball Ht Ht (inches) Ratio Length Size (inches) ratio

Male 6'7'' 79 0.108 8.53 29.625 0.288Female 6' 72 0.108 7.78 28.625 0.272

Average NBAers hand is 28.8% of ball lengthAverage WNBAers hand is 27.2% of ball length

How big should the WNBA ball be to equate males & females?

Need for biomechanics in Need for biomechanics in children’s sportschildren’s sports

Bio

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An on-linesite thatcovers

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