CATALOGO DEI PRODOTTI DELLA RICERCA
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishThe energy cost per unit distance (i. e. the economy of swimming, C) is given by the ratio / v where is the net (above resting) metabolic power and v is the swimming speed. The contribution of the aerobic and anaerobic energy sources to in swimming competitions differs according to the distance covered; it is independent of swimming style, gender or skill and depends essentially upon the duration of the exercise. In swimming, C increases with the speed with a non linear function; for a given speed, C is the lowest for the front crawl, followed by the backstroke, the butterfly and the breaststroke. C is essentially determined by the hydrodynamic resistance (Wd): the higher Wd, the higher C; and by the propelling efficiency (ηP): the higher ηP the lower C. Hence, all factors influencing Wd and/or ηP will result in proportional changes in C. The concepts of economy and efficiency are strictly related; hence, this chapter is also devoted to an analysis of the efficiencies in swimming; a summary of the values reported in the literature is also presented from a “historical point of view”. Last but not least the factors setting performance ( max and C) are briefly reviewed in view of a proper planning of swim training.
| Titolo: | Swimming economy (energy cost) and efficiency |
| Autori: | |
| Data di pubblicazione: | 2011 |
| Abstract: | The energy cost per unit distance (i. e. the economy of swimming, C) is given by the ratio / v where is the net (above resting) metabolic power and v is the swimming speed. The contribution of the aerobic and anaerobic energy sources to in swimming competitions differs according to the distance covered; it is independent of swimming style, gender or skill and depends essentially upon the duration of the exercise. In swimming, C increases with the speed with a non linear function; for a given speed, C is the lowest for the front crawl, followed by the backstroke, the butterfly and the breaststroke. C is essentially determined by the hydrodynamic resistance (Wd): the higher Wd, the higher C; and by the propelling efficiency (ηP): the higher ηP the lower C. Hence, all factors influencing Wd and/or ηP will result in proportional changes in C. The concepts of economy and efficiency are strictly related; hence, this chapter is also devoted to an analysis of the efficiencies in swimming; a summary of the values reported in the literature is also presented from a “historical point of view”. Last but not least the factors setting performance ( max and C) are briefly reviewed in view of a proper planning of swim training. |
| Handle: | http://hdl.handle.net/11562/428804 |
| ISBN: | 9781614707417 |
| Appare nelle tipologie: | 02.01 Contributo in volume (Capitolo o Saggio) |
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