I am a professor by profession. I sometimes feel that i should be more energetic and active. i should act very fast and must have a strong, sound and healthy heart. I am a strictly vegetarian, never take alcohol or smoke. I need advise on how much to eat daily, what to eat daily and what else to do to keep my heart very healthy and sound. sometimes, i feel that i am not so energetic and become slow to act or walk. thanks and regards. i am nearly 50 years of age.