Energy systems contributions in 2,000 m race simulation: a comparison among rowing ergometers and water

Abstract

This study investigated the energy system contributions of rowers in three different conditions: rowing on an ergometer without and with the slide and rowing in the water. For this purpose, eight rowers were submitted to 2,000 m race simulations in each of the situations defined above. The fractions of the aerobic (W (AER)), anaerobic alactic (W (PCR)) and anaerobic lactic (W ([La-])) systems were calculated based on the oxygen uptake, the fast component of excess post-exercise oxygen uptake and changes in net blood lactate, respectively. In the water, the metabolic work was significantly higher [(851 (82) kJ] than during both ergometer [674 (60) kJ] and ergometer with slide [663 (65) kJ] (P < or = 0.05). The time in the water [515 (11) s] was higher (P < 0.001) than in the ergometers with [398 (10) s] and without the slide [402 (15) s], resulting in no difference when relative energy expenditure was considered: in the water [99 (9) kJ min(-1)], ergometer without the slide [99.6 (9) kJ min(-1)] and ergometer with the slide [100.2 (9.6) kJ min(-1)]. The respective contributions of the W (AER), W (PCR) and W ([La-]) systems were water = 87 (2), 7 (2) and 6 (2)%, ergometer = 84 (2), 7 (2) and 9 (2)%, and ergometer with the slide = 84 (2), 7 (2) and 9 (1)%. VO2, HR and lactate were not different among conditions. These results seem to indicate that the ergometer braking system simulates conditions of a bigger and faster boat and not a single scull. Probably, a 2,500 m test should be used to properly simulate in the water single-scull race.

Consistency of Pacing and Metabolic Responses During 2000-m Rowing Ergometry

“…26 The TE for mean power recorded from trials 1 to 2 (1.8%), 2 to 3 (2.9%), and overall (2.4%) indicates good reproducibility across repeated trials, which concurs with our experimental hypothesis. TE was similar to that reported by Schabort et al 4 28,29 ; however, the participants in the current study had a higher body mass, so larger absolute VO 2 values would be expected.…”

Energy Demands during Maximal Sprint Cycling in Youth Cyclists

“…WPCR 시스 템은 10초 스프린트 테스트 후 초과산소 섭취량(EPOCFAST)을 고려하 여 산출되었으며, off VO2의 단일 및 이중 지수모델(mono-and bi-exponential models)에 맞춰 분석되었다. 이중 지수모델의 느린 구성 요소 (slow component)는 무시되었으며 단일 지수모델의 빠른 구성 요소(fast component)가 WPCR 의 분석에 쓰였다[14][15][16][17]23]. WLa -시스템 분석은 1 mmol·L -1 혈중 젖산 축적의 동등 값인 체질양의 3 ml O2 kg -1 을 사용하 였다[24].…”

The Relationship Between 500 M and 2000 M Simulated Rowing Times for Schoolboy Rowers Over a Training Period of Three Years

“…In elite rowers the physiological determinants of aerobic performance such as maximal oxygen uptake (VO 2 max), lactate and ventilatory thresholds reach high values during exertion [2][3][4]. recent data have indicated that during a competitive 2-km distance aerobic energy is responsible for about 87% of total energy demands [5]. In addition, a close correlation has been found between rowing performance and VO 2 max [6].…”

“…Furthermore, isokinetic and isometric knee extension strength and power during simulated rowing exercises are also correlated with ergometric rowing performance [9,10]. recently anaerobic energy sources were found to provide 13% of total energy demands during on-water 2000 m rowing with similar contribution to the lactic and alactic pathways (6 % and 7%, respectively) [5].…”