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Influence of noncircular chainring on male physiological parameters in hand cycling

Influence of noncircular chainring on male physiological parameters in hand cycling. Sebastian Zeller, MSc Sport Science; Thomas Abel, Prof Dr; Paul M. Smith, Dr; Heiko K. Strueder, Prof Dr. Aim

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Influence of noncircular chainring on male physiological parameters in hand cycling

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  1. Influence of noncircular chainring on male physiological parameters in hand cycling Sebastian Zeller, MSc Sport Science; Thomas Abel, Prof Dr; Paul M. Smith, Dr; Heiko K. Strueder, Prof Dr

  2. Aim • Examine influence of noncircular chainring (NCC) compared with conventional circular chainring (CC) on hand cycling performance. • Relevance • In racing and daily living, hand cycling is more efficient than handrim wheelchair propulsion.

  3. Method • 11 nondisabled males with no hand cycling experience completed trials using NCC and CC in random order on two separate occasions: • Incremental exercise test. • Two 20 s sprint tests. • 20 min endurance tests. • Two more 20 s sprint tests. • Two-way repeated-measures analysis of variance compared effects of NCC and CC on power data of sprint tests and metabolic response during endurance test.

  4. Results • Average power values of sprint tests: • No significant difference between NCC and CC. • Over time, values of 1st and 3rd sprint tests were higher than those of 2nd and 4th sprint tests for both chainrings. • Values of energy expenditure, gross efficiency, and net efficiency after 10 and 20 min of endurance test using NCC and CC: • No significant differences.

  5. Conclusion • Performance optimization using NCC in hand cycling could not be proven using current test conditions and focusing on physiological parameters.

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