( ( The ( habit ( to ( exercise regularly ) ) ) ) ( ( is ( a ( healthy one ) ) ) . ) )
(ROOT (S (NP (DT The) (NN habit) (S (VP (TO to) (VP (VB exercise) (ADVP (RB regularly)))))) (VP (VBZ is) (NP (DT a) (JJ healthy) (NN one))) (. .)))
The habit to exercise regularly is a healthy one.
(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.