Marta Jiménez-Salcedo, Miguel Monge, María Teresa Tena
Study of intermediate by-products and mechanism of the photocatalytic degradation of ciprofloxacin in water using graphitized carbon nitride nanosheets
Chemosphere
purpose little known childrens experience highintensity interval training hiit elementary school perceptions enjoyment perceived competence motivation likely drive longterm adherence therefore critical understanding hiit might implemented setting purpose study describe childrens vigorous physical activity vpa enjoyment perceived competency hiit activities within selfdetermination theory framework autonomy elementary school physical education pe classes methods participants 402 children single diverse elementary school 494 female 596 nonhispanic white student enjoyment perceived competency collected following teacher nonautonomous studentled autonomous conditions subset 201 children wore accelerometers measure percent time vpa hiit conditions mixed factorial design assessed series repeated measures anovas results children reported generally positive enjoyment perceived competence conditions rating 40 5point scale children significantly enjoyed 044 felt competent 011 autonomous hiit condition compared nonautonomous hiit condition contrast percent time vpa 094 significantly lower autonomous condition conclusions data illustrate challenging tradeoff design hiit trials increasing autonomy inclusion student choice increased enjoyment perceived competence hiit likely improve adherence lowered vpa likely reduce cardiometabolic impactabbreviations us united states pa physical activity mvpa moderatetovigorous physical activity pe physical education cdc centers disease control prevention randomized control trial rct sdt selfdetermination theory hiit highintensity interval training rct randomized control trial vpa vigorous physical activity irb institutional review board hfz healthy fitness zone paces physical activity enjoyment scale mean sd standard deviation