Thesis (MScMedSc (Biomedical Sciences))--University of Stellenbosch, 2005. / The purpose of this study was to determine the physiological and kinanthropometric attributes,
respiratory muscle strength, and core stability of successful endurance paddlers, and to
investigate the associations of these characteristics with kayak endurance performance in the
laboratory and the field.
Twenty male competitive paddlers (age: 28 ± SD 7 years, height: 184 ± SD 7 cm and weight: 80
± SD 7 kg) were categorised in two ability groups, Elite and Sub-Elite. Testing included
kinanthropometric measurements, maximum aerobic capacity, pulmonary function, six core
stability tests, a 30 min endurance performance test (EPT) on the K1 Ergo and a 10 km time trial
(TT) on the water. Maximum inspiratory mouth pressure (MIP) was measured before and after
the 30 min EPT on the K1 Ergo to assess respiratory muscle fatigue.
The Elite paddlers demonstrated significantly greater values for sitting height (as a percentage
of stature), relative VO2max, PPO, PPO/kg, MVV and MIP compared to the Sub-Elite paddlers
(All P < 0.05). They also demonstrated a significantly greater average PO and average back
stroke length during the 30 min K1 Ergo EPT (P < 0.05) and a significantly faster race time
(44:10 ± 1:17 vs 47:34 ± 3:14 min:s) during the 10 km water TT (P < 0.05), compared to the
Sub-Elite paddlers. The paddlers did not experience respiratory muscle fatigue (as determined
by change in MIP) after the 30 min K1 Ergo EPT. Significant intraclass correlations
coefficients of r = 0.81 for average PO (30 min K1 Ergo EPT), r = 0.76 for MIP, and r = 0.95 for
10 km performance time, revealed the high repeatability of these tests. Significant relationships
were found between the two endurance performance tests (30 min K1 Ergo EPT and 10 km
water TT, r = -0.64, P < 0.05) and between both tests and a number of kinanthropometric,
physiological and respiratory muscle function parameters. Stepwise multiple regression
analysis revealed that PPO and MVV predicted endurance performance (average PO) on the K1
Ergo (R2 = 0.75, SEE = 15 W), whereas relative VO2max and best MIP predicted 10 km
performance time on the water (R2 = 0.64, SEE = 115 s). The results of this study suggest that superior maximum aerobic capacities and respiratory
muscle function distinguish successful paddlers from less successful paddlers and may be used
to predict kayak endurance performance in the laboratory as well as on the water. No
respiratory muscle fatigue occurred during the 30 min K1 Ergo EPT, indicating that respiratory
muscle fatigue may not be a limiting factor to 30 min kayak endurance performance. The core
stability results demonstrated no relevance to kayak endurance performance.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/1790 |
| Date | 03 1900 |
| Creators | Kroff, Jacolene |
| Contributors | Terblanche, Elmarie, Myburgh, Kathryn H., University of Stellenbosch. Faculty of Health Sciences. Dept. of Biomedical Sciences. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Stellenbosch |
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