Description: In endurance exercise it is crucial to be energy efficient, and the efficiency is affected by cadence. In cycling the existence of the cadence paradox is well known, where the self-chosen cadence is less efficient than the most efficient cadence. Research concerning choice stroke rate and energy efficiency in flatwater kayaking is limited. Purpoese: The purpose of this study was to determine the relationship between the physiological responses, gross efficiency, paddling economy and changes in stroke rate with an fixed intensity at 60% of VO2peak in ergometer kayaking Methods: 11 competitive national talent kayak paddlers were recruited (mean±SD, age: 19±3, weight: 80±9kg, height: 1.83±0.05m). Four stroke rates were tested: freely chosen (FCSR), 65, 75 and 90 spm. Results: The cardio respiratory responses were significantly affected by changes in stroke rate. VO2 response during 65 spm (2935 ± 374 L*min-1) was significantly higher than 75 spm (2767 ± 389 L*min-1) (p<0.05), no differences were observed between rests of the stroke rates. HR and VE were also affected where 90 (VE: 83 ± 11 and HR: 150 ± 11) were significantly higher than 75 spm (P<0.01; VE: 78 ± 10, P<0.05; HR: 148 ± 13) and FCSR (67 ± 6.1 spm) (P<0.01; VE: 75 ± 9, P<0.05; HR: 147 ± 11). Gross Efficiency had a strong tendency to be significant different (p=0.054). Conclusion: In conclusion, the results of this study demonstrated that stroke rate affects the paddling economy during ergometer kayaking. Furthermore the FCSR are highly individual while kayaking (SD: ±6.05 spm).
- Ergometer kayak