The main purpose of our examinations was to compare the energy expenditure in laboratory and the simulation exercises of boardsailing which are similar to those ones at low and high winds. The results of our examinations have proved significant energy expenditure in the boardsailors at low wind. It may be related to submaximum aerobic power where the oxygen enrgy is at the level of 95%. Considering the boardsailors take part in 4 races a day, so the energy expenditure may by dependent on the boardsailors' performance. Moreover, our results have proved significant energy expenditure in the elite boardsailors at HRav : 168 bpm during windsurfing simulator test (more 2500 kJ). But during cycloergometer test. this index is always higher. This findings should be carefully interpreted when refer to the cycloergometer testes.
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