( ( ( STRENGTH ( TRAINING Loss ) ) ( of ( ( ( muscle mass ) ( -LRB- ( sarcopenia -RRB- ) ) ) ( with ( age ( in humans ) ) ) ) ) ) ( ( is ( well documented ) ) . ) )
(ROOT (S (NP (NP (NNP STRENGTH) (NNP TRAINING) (NNP Loss)) (PP (IN of) (NP (NP (NP (NN muscle) (NN mass)) (PRN (-LRB- -LRB-) (NP (NNP sarcopenia)) (-RRB- -RRB-))) (PP (IN with) (NP (NP (NN age)) (PP (IN in) (NP (NNS humans)))))))) (VP (VBZ is) (ADJP (RB well) (VBN documented))) (. .)))
STRENGTH TRAINING Loss of muscle mass (sarcopenia) with age in humans is well documented.
(ROOT (S (NP (NP (NNP Muscle)) (ADJP (RB atrophy) (JJ due) (PP (TO to) (NP (NN age))))) (VP (VBZ is) (VP (VBN called) (NP (NN sarcopenia)))) (. .)))