You do not need to have a belief - just keep an open mind. Most meditators would agree that there is an overall improvement in health. The deep rest and relaxation experienced by the body and central nervous system during Meditation is very beneficial in any illness. Most health problems, particularly psychosomatic illnesses respond very well to these practices. Powerful healing energies are drawn to you during Meditation.
Stress is the greatest Dis-Ease of the mind in our modern times.
Meditation naturally alleviates stress - getting to the root cause of the stress. Exercise and other forms of stress management programmes will temporarily alleviate stress, but are not powerful enough to reach the root cause of the problems. Every time we Meditate we draw energies to heal us, energies to help us mentally, physically and emotionally. Therefore, Meditation resolves the cause of our stress in a unique way, allowing us to gather inner strength as we positively sort out the stress points in our lives. Problems in your life are a reflection of unresolved matters within you.