( ( Regular ( aerobic exercise ) ) ( ( is ( essential ( to ( good health ) ) ) ) . ) )
(ROOT (S (NP (JJ Regular) (JJ aerobic) (NN exercise)) (VP (VBZ is) (ADJP (JJ essential) (PP (TO to) (NP (JJ good) (NN health))))) (. .)))
Regular aerobic exercise is essential to good health.
(ROOT (S (NP (NNP Exercising)) (ADVP (RB regularly)) (VP (VBZ is) (NP (DT a) (JJ good) (NN health) (NN habit))) (. .)))
Exercising regularly is a good health habit.