( ( Elite rowers ) ( ( need ( to ( have ( ( ( ( ( strength , ) endurance ) and ) ( the ability ) ) ( to ( ( get ( lots ( of oxygen ) ) ) ( to ( their muscles ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Elite) (NNS rowers)) (VP (VBP need) (S (VP (TO to) (VP (VB have) (S (NP (NP (NN strength)) (, ,) (NP (JJ endurance)) (CC and) (NP (DT the) (NN ability))) (VP (TO to) (VP (VB get) (NP (NP (NNS lots)) (PP (IN of) (NP (NN oxygen)))) (PP (TO to) (NP (PRP$ their) (NNS muscles)))))))))) (. .)))
Elite rowers need to have strength, endurance and the ability to get lots of oxygen to their muscles.
(ROOT (S (NP (NP (NNP Strength)) (, ,) (NP (NP (DT the) (NN ability)) (PP (IN of) (NP (DT a) (NN muscle) (S (VP (TO to) (VP (VB use) (NP (NN force)) (PP (IN during) (NP (DT a) (NN contraction))))))))) (, ,)) (VP (VBZ differs) (PP (IN from) (NP (NNP endurance))) (, ,) (S (VP (VBG meaning) (NP (NP (DT the) (NN ability)) (PP (IN of) (NP (DT a) (NN muscle) (S (VP (TO to) (VP (VB continue) (PP (TO to) (NP (NP (NN contract)) (PP (IN over) (NP (NN time))))) (PP (IN without) (S (VP (VBG getting) (ADJP (JJ tired)))))))))))))) (. .)))
Strength, the ability of a muscle to use force during a contraction, differs from endurance, meaning the ability of a muscle to continue to contract over time without getting tired.