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In RBN 2006/09 we have described a concept of “catch through the stretcher” and now will give more data and analysis to prove the fact that this idea really works. 

Views: 1951 | Added by: Katerina | Date: 03.07.2014 | Comments (0)

Coaches and rowers quite often mismatch the terms ‘force’ and ‘power’ and use ‘power curve’ to mean ‘force curve’. Also, they say ‘power strokes’ meaning a drill with maximal force application at low stroke rates, quite often with a water brake. In fact, the power in this drill is not very high because of low speed and stroke rate. It would be good to refresh the basics and promote correct usage of biomechanical terminology.

Views: 2298 | Added by: Katerina | Date: 21.04.2014 | Comments (0)

Recently, a new interesting phenomenon was discovered in analysis of the data in M1x at 32 str/min, which was also found in other rowers at various stroke rates. Is our hypothesis that the depth of the blade could be related to the ratio of the blade-to-handle forces: the deeper the blade, the lower the blade force at the same handle force right? 
Views: 1479 | Added by: Katerina | Date: 12.03.2014 | Comments (0)

Coaches, which we were working with, quite often mentioned psychological effect of biomechanical information and methods. During the FISA conference-2012 in Limerick, Thomas Poulsen said that objective measurements help the coach to communicate with rowers in a positive way. During the FISA conference 2013 in Tallinn, Johan Flodin has shown how biomechanical assessment creates confidence and sets clear targets for improvement. Here we try to summarise psychological effects of biomechanical measurement and evaluation procedure. 
Views: 1354 | Added by: Katerina | Date: 12.03.2014 | Comments (0)

The blade specific impulse introduced in the previous Newsletter could be considered as a measure of its effectiveness (performance), which is often controversial to efficiency (RBN 2011/10). Similar controversy can be seen in aircrafts, where efficiency increases with the speed, but performance decreases, so the design of the engine is defined by both cruising speed and takeoff requirements.
Views: 1396 | Added by: Katerina | Date: 20.01.2014 | Comments (0)

We already discussed the blade propulsive efficiency a number of times, but still not completely satisfied with understanding of this important variable. Does the blade work as a jet engine or as a car wheel?
Views: 1686 | Added by: Katerina | Date: 03.12.2013 | Comments (0)

Two further experiments were done to investigate the reasons of the lift force. A Concept2 erg was mounted on slides through three sensors measuring the whole weight force of the erg with a rower (Fig.1). The lift force was derived as the difference between static weigh and measured vertical force during rowing. The erg was instrumented to measure handle force and po-sitions of the handle, seat and trunk. 
Views: 1314 | Added by: Katerina | Date: 20.11.2013 | Comments (1)

We have received an interesting feedback on our findings about rower’s suspension published in the previous Newsletter. 
Views: 2051 | Added by: Katerina | Date: 28.10.2013 | Comments (1)

Recently, we have conducted another experiment on vertical forces. In addition to the seat force (RBN 2013/04), vertical and horizontal forces at the stretcher were measured at three points, where the stretcher is mounted to the boat (Fig.1) and summed up. 
Views: 1551 | Added by: Katerina | Date: 03.09.2013 | Comments (1)

The purpose of this article is twofold: 1) to describe our model of rowing technique; 2) to clarify definitions of rowing biomechanics terminology. The stroke cycle could be presented as 8 "Moments” M1-M8-momentary snapshots, and 8 "Phases” P1-P8 - transitions between the moments.
Views: 1571 | Added by: Katerina | Date: 13.08.2013 | Comments (0)

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