Only 36 studies described the randomization process. Attrition was described in 31 studies, with a M attrition of 22,69 percent (SD=16.8,range=0to67%).
Only 18 studies reported ethnicity, with white participant being the domization ethnic group in 15 studies, followed by african american (n=2) and hispanic (n=1).
Participants body composition was described in 32 studies; with 18 studies consisting of overweight/obese participants
Finally,28 studies described pre-intervention fitness level, with 27 studies reporting sedentary/low activity participant followed by active participant (n=1)