( Researchers ( ( ( measured ( ( ( ( ( ( ( ( ( cardiac output ) , ) ( heart rate ) ) , ) ( stroke volume ) ) , ) ( blood pressure ) ) and ) ( oxygen consumption ) ) ) ( during ( ( rest and ) exercise ) ) ) . ) )
(ROOT (S (NP (NNS Researchers)) (VP (VBD measured) (NP (NP (JJ cardiac) (NN output)) (, ,) (NP (NN heart) (NN rate)) (, ,) (NP (NN stroke) (NN volume)) (, ,) (NP (NN blood) (NN pressure)) (CC and) (NP (NN oxygen) (NN consumption))) (PP (IN during) (NP (NN rest) (CC and) (NN exercise)))) (. .)))
Researchers measured cardiac output, heart rate, stroke volume, blood pressure and oxygen consumption during rest and exercise.
(ROOT (S (NP (NP (DT The) (NN term) (JJ cardiac) (NN output)) (, ,) (VP (VBN calculated) (PP (IN by) (S (VP (VBG multiplying) (NP (NN heart) (NNS contractions)) (PP (IN by) (NP (NN stroke) (NN volume))))))) (, ,)) (VP (VBZ means) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (NP (NN blood)) (VP (VBN pumped) (PP (IN by) (NP (NP (DT the) (NN heart)) (PP (IN in) (NP (CD one) (NN minute)))))))))) (. .)))
The term cardiac output, calculated by multiplying heart contractions by stroke volume, means the volume of blood pumped by the heart in one minute.