Key result
Heart rate and stroke rate significantly misrepresented the time spent in training zones T1-T5 compared to power output during on-water sprint kayak training.
Why the study?
The study was conducted to compare methods of monitoring and prescribing on-water exercise intensity, including heart rate, stroke rate, and power output, during sprint kayak training.
Observational (n=12)
No
p-value: p=<0.001
Heart rate and stroke rate misrepresent the time spent in specific training zones when exercise intensity is prescribed by power output in sprint kayaking.
Questions reliance on HR or stroke rate for kayak training zones; leaves open whether power-based methods improve outcomes.
PURPOSE: To compare methods of monitoring and prescribing on-water exercise intensity (heart rate [HR], stroke rate [SR], and power output [PO]) during sprint kayak training. METHODS: Twelve well-trained flat-water sprint kayak athletes completed a preliminary on-water 7 × 4-min graded exercise test and a 1000-m time trial to delineate individual training zones for PO, HR, and SR into a 5-zone model (T1-T5). Subsequently, athletes completed 2 repeated trials of an on-water training session, where intensity was prescribed based on individual PO zones. Times quantified for T1-T5 during the training session were then compared between PO, HR, and SR. RESULTS: Total time spent in T1 was higher for HR (P < .01) compared with PO. Time spent in T2 was lower for HR (P < .001) and SR (P < .001) compared with PO. Time spent in T3 was not different between PO, SR, and HR (P > .05). Time spent in T4 was higher for HR (P < .001) and SR (P < .001) compared with PO. Time spent in T5 was higher for SR (P = .03) compared with PO. Differences were found between the prescribed and actual time spent in T1-T5 when using PO (P < .001). CONCLUSIONS: The measures of HR and SR misrepresented time quantified for T1-T5 as prescribed by PO. The stochastic nature of PO during on-water training may explain the discrepancies between prescribed and actual time quantified for power across these zones. For optimized prescription and monitoring of athlete training loads, coaches should consider the discrepancies between different measures of intensity and how they may influence intensity distribution.
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Hogan et al. (2019) conducted an observational in Well-trained flat-water sprint kayak athletes (n=12). Heart rate and stroke rate monitoring vs. Power output monitoring was evaluated on Time spent in training zones T1-T5 (p=<0.001). Heart rate and stroke rate significantly misrepresented the time spent in training zones T1-T5 compared to power output during on-water sprint kayak training.
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