Open to debate .
It does not seem unreasonable to state that these values exceed a certain physiological maximum ( e.g. , cycle ergometry values by Ingen Schenau , de Boer , Geysel , & de Groot , 1988 ) .
Although open to debate , it does not seem unreasonable to state that these values exceed a certain physiological maximum ( e.g. , cycle ergometry values by Ingen Schenau , de Boer , Geysel , & de Groot , 1988 ) .