It may be one of the most overlooked religious obligations of our time.
Not prayer. Not charity. Not even Torah study. But exercise.
That may sound odd, because Judaism is not a culture of physical vanity. We do not worship the body, glorify muscle, or measure human worth by outward appearance. The Torah’s ideal is not the athlete in the stadium, but the Jew who lives with faith, discipline, humility, and a sense of higher purpose.
And yet, somewhere along the way, many of us seem to have confused rejecting vanity with neglecting health.
When it comes to sleep, diet, movement, and basic physical care, too many people treat the body as if it were religiously irrelevant.
Jewish tradition says otherwise.
The Talmud makes the point in memorable fashion. When Rabbi Huna’s son dismissed Rabbi Chisda’s lectures because they dealt with ostensibly secular matters, Rabbi Huna rebuked him: “He teaches you how to be healthy, and you call that secular?” (Shabbat 82a). In Judaism, learning how to care for the body is not a diversion from religious life. It is part of the wisdom required to live it properly.
In the Mishneh Torah, the monumental compendium of Jewish law by the Rambam, this point is made with extraordinary clarity: “Since having a healthy and whole body is among the ways of God, for a person can’t understand or know anything of the Creator when he is ill, therefore a person must distance himself from things that damage the body and accustom himself to things that make the body healthy and strong” (Hilchot De’ot 4:1).
The wording is noteworthy. The Rambam does not describe health as merely useful or advisable. He calls it midarchei Hashem, “among the ways of God.” A healthy body is not the purpose of life. But it is one of the instruments through which life’s purpose is fulfilled.
We learn Torah with a mind that needs rest, and perform acts of kindness with hands and feet that need energy. We build families, communities, and a country with bodies that can be strengthened or weakened by the choices we make.
Guarding health is not just fitness advice, but also Jewish law
The Tur, the 14th-century legal code by Rabbi Ya’acov ben-Asher, is even more explicit: “It is a mitzvah to conduct oneself with proper habits and good conduct to guard one’s health, so that one may be healthy and strong for the service of the exalted Creator” (Orach Chaim 155).
This is not fitness advice. It is halacha.
Of course, exercise is not an independent commandment like putting on tefillin or blessing the lulav. There is no blessing before a morning walk and no Talmudic tractate entitled “Laws of the Gym.” But when physical activity is necessary to preserve health and strength for serving God, it becomes part of a larger religious obligation: to guard the life and body that the Creator has entrusted to us.
This matters because religious people can sometimes cloak negligence in the language of faith.
“If God wants me to be healthy,” a person might say, “I will be healthy.”
But that is not faith. It is fatalism.
In the Talmud (Chullin 7b), Rabbi Hanina teaches that “a person does not injure his finger below unless it was declared about him above.” Divine providence is real. But the same Rabbi Hanina teaches in the tractate Bava Metzia 107b that “everything is in the hands of heaven, except for cold and heat,” citing the verse in Proverbs (22:5): “Cold and heat are on the crooked path; one who guards his soul will keep far from them.”
Belief in providence does not exempt a person from responsibility. A man who stands outside in freezing weather without a coat cannot blame God. He has simply been careless.
The midrash makes the point even more sharply. In Vayikra Rabbah 16:8, Rabbi Aha says: “It depends upon a person that illnesses should not come upon him.” The midrash derives this from the verse, “The Lord will remove from you every illness,” interpreting “from you” to mean that it is incumbent upon man to do what he can to prevent himself from getting sick.
Exercise is not a guarantee to good health, but it raises the chances
This is not a guarantee. Healthy people can become ill, and no amount of exercise grants immortality. But Judaism demands that we distinguish between what is beyond our control and what we negligently fail to control.
This is where the discussion becomes practical.
In Hilchot De’ot 4:14, the Rambam writes that as long as a person exercises, exerts himself, avoids overeating, and maintains proper digestion, “illness does not come upon him, and his strength increases.” In the very next halacha, he warns that one who sits idly and does not exercise may suffer weakness and pain even if he eats properly.
In other words, health is not only a matter of avoiding harmful foods or bad habits. It is also shaped by whether we move, strengthen, and discipline the body.
THIS HAS BECOME more urgent in our age. Earlier generations walked, lifted, climbed, carried, and labored as a routine part of daily life. Today, it is possible to spend an entire day moving from one seated position to another: from bed to car, from car to desk, from desk to table, from table to couch, and from couch back to bed.
One can be busy from morning to night and still barely move.
Such a routine is hardly a formula for strength or vitality. And from a Jewish perspective, the consequences are not merely physical. When preventable weakness, fatigue, and illness reduce our ability to learn, pray, work, parent, and help others, they affect our spiritual lives as well.
This does not mean everyone should follow the same routine. For one person, the right exercise may be walking. For another, swimming, physical therapy, stretching, cycling, or light weights. Age, health, ability, and medical guidance all matter.
But the basic principle cannot be ignored: A Jew has no right to treat his body with contempt and call it spirituality.
Rav Avraham Yitzhak Kook gave this idea a national dimension. He wrote that when the youth of Eretz Yisrael strengthen their bodies for the sake of the nation, their physical development can itself contribute to spiritual renewal (Orot Hatechiyah 34). Judaism does not object to strength. It simply asks that strength be cultivated for something larger than the self: to build, protect, and serve the Jewish people.
In fact, the Shulchan Aruch (Choshen Mishpat 427:10) rules that a person may not endanger himself and then say, “I am only putting myself at risk; what concern is it of others?” The Be’er Hagolah, the 17th-century commentary of Rabbi Moshe Rivkes, explains in his concluding note to this section that God created the world in kindness so that His creatures could recognize Him and serve Him. One who endangers himself, he writes, acts as if he rejects the good that the Creator gave him.
It is a powerful corrective to modern individualism. The body is ours to use, but not ours to abuse. It is a pikadon, a sacred deposit entrusted to our care.
Seen this way, exercise is not a concession to contemporary health culture. It is an expression of Jewish responsibility.
In an age of sedentary work, endless screen-time, and constant stress, this may be one of the most practical religious lessons we need to recover. Taking a walk, building strength, eating with discipline, and caring for one’s health are not distractions from a serious Jewish life. Done with the right intention, they are an essential part of it.
The body is the vessel through which we serve God in this world. Guarding it is not a luxury. It is a mitzvah – and it is time we began treating it as one.
The writer served as deputy communications director under Prime Minister Benjamin Netanyahu.