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Allometric Scaling of Rowing

Allometric Scaling of Rowing. Michele Baeder. The Study: Indoor Rowing. “Multivariate allometric scaling of men’s world indoor rowing championship performance” Vanderburgh et. all, 1996, Medicine and Science in Sports and Exercise When: 1995

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Allometric Scaling of Rowing

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  1. Allometric Scaling of Rowing Michele Baeder

  2. The Study: Indoor Rowing • “Multivariate allometric scaling of men’s world indoor rowing championship performance” • Vanderburgh et. all, 1996, Medicine and Science in Sports and Exercise • When: 1995 • Where: World Indoor Rowing Championships-Boston, Mass. • Subjects: 148 male rowers ranging from world class masters to club or intercollegiate levels • All subjects rowed a 2500m erg piece on Concept IIC stationary rowing ergometers

  3. C.R.A.S.H.-B. Sprints (WIRC) http://www.youtube.com/watch?v=gN2WX10hBUc

  4. Background • The event of the WIRC is a single 2500m row on a stationary ergometer. • This is a non-weight bearing event due to the lack of water drag • Male Rowers are split into only 2 weight classes light, < 74.8kg, and heavy, >74.8kg. This leaves anyone well under or just above the light weight limit with little to no chance of winning. • Rowers are also split into age groups of <30, 30-39, 40-49, 50-59, 60-69, 70-79, and >80. • The <30 age group contains the overwhelming majority and the older age groups have very few participants.

  5. Theoretical Approach • RS3 ~ BW⅔(fan law) • RS ~ BW2/9 • H ~ BW⅓ • RT ~ RS-1 • RT ~ H-1 • Age is adjusted because of rowing performance’s relationship with VO₂max

  6. Why Height is Important • General physics • Levers • Limb length

  7. Procedure • Body mass and height were measured before the event. • The event was done in heats, all using the rowing Concept IIC ergometer • Times were recorded from this event and the time, weight, and height were all studied through regression analysis

  8. Results • The exponent for Height was 0.937 +/- 0.12 • T/H-1 = T*H • Age was found to have an exponent of 0.061 +/- 0.01 • SS = T*H*A-0.06 • This allows rowers to be compared regardless of height and age on the erg.

  9. Results Comparison

  10. Norms for Height and Age

  11. Conclusion • Taller, heavier rowers are faster • On rowing ergometers there is a bigger advantage for height. • Male rowers can be compared with no group separation on their indoor rowing speed with the scaled score of T*H*A-0.06 • This does not scale for who will be faster on the water

  12. Scaling Rowing Ergometer Performance for on the Water • A 2008 study in Great Britain • Scaling for on the water rowing speed from ergometer rowing speed uses body weight • BW affects on the water rowing by adding drag • Rowing ergometer results will show a greater speed difference between heavyweights and lightweights than on the water rowing will

  13. Sources • Vanderburgh, Paul M., Frank I. Katch, Joseph Schoenleber, Christos P. Balabinis, Robb Elliott. “Multivariate allometric scaling of men’s world indoor rowing championship performance.” Medicine and Science in Sports and Exercise. 1995. • Nevill A.M., C. Beech, R. L. Holder, M. Wyon. “Scaling concept II rowing ergometer performance for differences in body mass to better reflect rowing in water.” Scandinavian Journal of Medicine & Science in Sports. 2009.

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