PET effects on physical fitness in  healthy workers  are moderated by age ( CRF ) and occupation type ( muscular endurance ) .
Further , independently computed subgroup analyses indicated that the training period of the PET programs may play an important role in improving CRF in workers
There is evidence that physical exercise training ( PET ) conducted at the workplace is effective in improving physical fitness and thus health .
However , there is no current systematic review available that provides high-level evidence regarding the effects of PET on physical fitness in the workforce .
To quantify sex- , age- , and occupation type-specific effects of PET on physical fitness and to characterize dose – response relationships of PET modalities that could maximize gains in physical fitness in the working population .
Age, sex, race, initial fitness, and response to training: the HERITAGE Family Study.
Effects of age , sex , race , and initial fitness on training responses of maximal O(2 ) uptake ( VO(2 max ) ) are unclear . Data were available on 435 whites and 198 blacks ( 287 men and 346 women ) , aged 17 - 65 yr , before and after st and ardized cycle ergometer training .  Individual responses varied widely , but VO(2 max ) increased significantly for all groups . Responses by men and women and by blacks and whites of all ages varied widely . There was no sex difference for change ( Delta ) in VO(2 max ) ( ml . kg(-1 ) . min(-1 ) ) ; women had lower initial values and greater relative ( % ) increases . Blacks began with lower values but had similar responses . Older subjects had a lower Delta but a similar percent change . Baseline VO(2 max ) correlated nonsignificantly with DeltaVO(2 max ) but significantly with percent change . There were high , medium , and low responders in all age groups , both sexes , both races , and all levels of initial fitness . Age , sex , race , and initial fitness have little influence on VO(2 max ) response to st and ardized training in a large heterogeneous sample of sedentary black and white men and women
PET effects on physical fitness in  healthy workers  are moderated by age ( CRF ) and occupation type ( muscular endurance ) .
Further , independently computed subgroup analyses indicated that the training period of the PET programs may play an important role in improving CRF in workers
There is evidence that physical exercise training ( PET ) conducted at the workplace is effective in improving physical fitness and thus health .
However , there is no current systematic review available that provides high-level evidence regarding the effects of PET on physical fitness in the workforce .
To quantify sex- , age- , and occupation type-specific effects of PET on physical fitness and to characterize dose – response relationships of PET modalities that could maximize gains in physical fitness in the working population .