Some people i work out with are 20 years older yet don't seem old. most are retired faculty who go each am to fitness class. which factors count most?

The current state of health: Living a lifestyle of correct eating taking care of yourself by seeing your doctor regularly as well as exercising rarely over lifetime can help you appear healthier than others regardless of patients at her initiatives in her 70s it can actually outperformed many patients after anciently because they've been living a good lifestyle for many years this is what we encourage proper eating regular exercise.

Dedication, goals: I have been deliberately exercising for 47 years. Decide what your goals are : bulk up, endurance, long term health, agility, avoiding older age problems, just plain feeling vigorous. We now know the multitude of benefits of regular exercise, but many choose not to take advantage of them. Find a happy mix and make it part of your daily life. It is worth every moment. Eat healthy, get sleep.