Swami Sivananda was a great advocate for fasting. To quote him:

Benefits of fasting.
By Swami Sivananda

Nowadays, many educated people do not observe fasting on this sacred day. This is due to the impact of the dark, vicious, materialistic forces. When the intellect develops a little, people begin to enter into arguments and unnecessary discussions. Intellect is a hindrance on the spiritual path. They who have not developed the heart but who have developed their intellect begin to doubt and question at every step. They are led astray. They want a why and a how for everything. They want scientific explanations for all phenomena.

God is beyond proofs and presumptions. One has to approach religion and the scriptures with great faith, reverence and purity of heart. Then only are the secrets of religion revealed unto him like the apple in the palm of one's hand. Does anybody ask his mother to prove who is his father?

Withdraw the senses and fix the mind on god. Pray to god to guide you and to throw a flood of light on your spiritual path. Say with feeling: O god, guide me! Protect me, protect me! I am Thine, I am Thine! Forsake me not! You will be blessed with purity, light and strength. Follow this sadhana on the days that you fast, ekadashi days in particular.

Fasting is one of the ten canons of yoga. However, avoid excessive fasting. It will produce weakness. Use your common sense. If you cannot fast for the full twenty-four hours, at least fast for 10-12 hours and then take some milk and fruit. Gradually increase your fast to 15 hours and then up to 24 hours. Fasting makes a man strong, both spiritually and mentally.

In his code, the manu smriti, the great Hindu lawgiver, manu, prescribes fasting for the removal of the five capital sins. Diseases that are pronounced incurable by doctors are cured by fasting. Occasionally, a complete fast is greatly desirable for all to keep up good health, to give adequate rest to the internal organs and maintain celibacy. All diseases have their origin in overeating and verily fasting is the only method to cure this.

Jesus also recommended fasting. Quoting from The Gospel of Peace

Jesus further recommends colonics. Quote:

Jesus then goes on to describe how to make and do a gravity colonic. So colon cleansing is not something new, but has been practiced for over 2000 years. If diseases were caused by impurities and toxins 2000 years ago, how much more vital must it not be to fast and cleanse today, when we live in a world putrefied with chemicals and toxins.

If diseases were caused by impurities and toxins 2000 years ago, how much more vital must it not be to fast and cleanse today, when we live in a world putrefied with chemicals and toxins. I saw an article some time ago in a London newspaper, which claimed that a person living in London, UK is exposed to 500 different toxins every day. Children today are born with toxic blood:

Ayurvedic massage has a special relevance in the present era where pollution is predominant all over the world. Furthermore living a disciplined life is almost impossible for a person even if he wants to. A person thus gets sandwiched between pollution on one side and a scattered way of life on the other and ages prematurely. It is high time we ask ourselves whether there are any solutions? Yes, Ayurvedic massage can help tremendously.

In a very simple way, Ayurvedic massage can be explained as the methodological scientific external application of medicated oils to the entire body exerting optimum pressure. In Ayurveda external application of herbs and oils and the penetration of medicinal effect through the skin was well established and considered of equal importance if not more than that of oral administration of medicines. Medicated oils are prepared in strict conformity with the methods laid down, usually containing chosen herbs and plant juices which impart to the oils the required medicinal properties as powerful stimulants and counter irritants.

A scientific Ayurvedic massage, thus more than curing a patient of his/her illness, prevents the occurrence and recurrence of the disease and hence is advised even for maintenance and preservation of one's health.

The medical effect of the oils penetrates the skin, goes deep into the system and brings the toxins to the peripheral area of the body where they come out through the skin. Therefore a sauna, steam bath or hot shower is advisable after the massage.

All the marma (acupressure) points are given an optimal pressure by the masseur with his fingers which in turn activates the internal organ. Hence Ayurvedic Massage is not just to give soothing effect to the muscles and the skin, but also rejuvenates all internal organs.
According to Yoga-shastra, the index finger is for releasing the energy and the thumb is to absorb. Here the masseur uses mainly the index finger and the thumb and thus impart his/her energy to the person and takes the negative energy away from the person.
Ayurvedic Massage ensures proper circulation and relaxation of the muscles, and also removes tension. It increases circulation which produces more oxygen, glucose, protein and other vital sources for the blood.