Lactate improved from 2.7 to 1.1.
 Lactate levels increased 
(ROOT (S (NP (NNP Lactate)) (VP (VBD improved) (PP (IN from) (NP (CD 2.7))) (PP (TO to) (NP (CD 1.1)))) (. .)))
(ROOT (S (NP (NN Lactate) (NNS levels)) (VP (VBD increased))))
( Lactate ( ( ( improved ( from 2.7 ) ) ( to 1.1 ) ) . ) )
( ( Lactate levels ) increased )