Kukai's Esoteric Bodywork to Prevent Summer Fatigue: Six Practices to Restore Heaviness, Lost Appetite, and Poor Sleep

Why Does the Body Grow Heavy in Summer?

As summer deepens, the body somehow feels heavy, appetite won't rise, nights are stifling and mornings bring no freshness — not a few people feel such troubles year after year. This is so-called *summer fatigue.*

Behind summer fatigue lie several bodily factors. The temperature gap between fierce heat and air-conditioned interiors burdens the autonomic nervous system that regulates body temperature. Water and minerals are lost through sweat, and taking only cold things weakens the stomach and gut, dropping appetite. Stifling nights lower sleep quality, and fatigue won't clear. Within this vicious cycle, mind and body wear down little by little.

In fact, on how to restore such *disorder of the body,* the esoteric view of the body that Kukai (Kobo Daishi) taught twelve hundred years ago has left rich wisdom that still applies today. Kukai prized restoring mind and body as one, without separating them. This article, learning from Kukai's teaching, introduces six bodywork practices to prevent summer fatigue and restore heaviness, lost appetite, and poor sleep.

Kukai's "Mind and Body as One" — Order the Body, and the Mind Orders Too

Kukai's esoteric Buddhism holds the foundational idea of *body-speech-mind (shinkui)* — restoring body, word, and mind aligned as one. Above all, Kukai prized not trying to order the mind alone, but ordering from the body first. This is the thought of *mind and body as one (shinshin ichinyo)* — that mind and body are originally one and cannot be divided.

The *heaviness* and *lack of drive* in summer fatigue are not weakness of mind, but a state in which the body's disorder is mirrored straight into the mind. That is why, rather than forcing yourself to whip up the mind, carefully restoring from the body's side first is, in the end, the shortcut to recovering the mind's condition too.

The six practices introduced below are all bodywork that needs no special tools and can be continued without strain within daily life.

Practice 1: Wake from Within with a Morning Cup of Warm Water

In summer, when we tend to chill the gut with cold drinks, I recommend making the morning's first cup *warm water (sayu).*

Water boiled once, then cooled to a drinkable temperature, sipped slowly right after waking. This alone gently warms the organs chilled through the night and slowly wakes the digestive system. In contrast to gulping down cold water, warm water burdens the body little and readies you to begin the day from within.

In the esoteric regimen Kukai prized, it is held important not to over-chill the body but to keep an inner warmth. Drinking sip by sip, savoring the sensation of warmth seeping to the body's core, becomes in itself a quiet morning meditation.

Practice 2: Order the Autonomic Nerves with "Counting-Breath" Breathing

A major cause of summer fatigue is disorder of the autonomic nervous system. Effective for restoring it is a breath-regulating practice Kukai also prized: *counting-breath contemplation (susokukan).*

The method is very simple.

1. Sit with the spine lightly stretched, and release the tension in the shoulders. 2. Quietly inhale through the nose, and slowly exhale through mouth or nose. 3. Each time you exhale, count in your heart: *one,* *two.* 4. After counting to ten, return to one. Continue this for a few minutes.

The knack is to make the exhale longer than the inhale. Slow, deep breathing calms the rise of the sympathetic nerves that govern tension and lets the parasympathetic nerves that govern rest take precedence. Through this, the autonomic balance disordered by heat and air conditioning is restored little by little.

Practice 3: Loosen Neck, Shoulders, and Ankles to Release Heat

In the hot season, the body unconsciously tenses, and heat readily builds up. So bring in bodywork that loosens places prone to stiffness and releases heat.

• Neck rolls: Slowly tilt the neck side to side and move it back and forth, loosening a stiff nape.
• Shoulder lifts: Inhale and lift the shoulders smoothly; exhale and drop them.
• Ankle circles: Seated, circle the ankles widely to promote blood flow at the extremities.

These can be called a modern application of the *ordering the body* practice Kukai taught. As bodily stiffness loosens, built-up heat escapes more easily and the heaviness lightens. Especially for those who spend long hours in air-conditioned rooms, inserting such movements frequently prevents the imbalance of chill and heat.

Practice 4: Eat Meals with the Heart of the "Verse of Five Contemplations"

In summer, appetite drops, and we tend to make do with only cold noodles or ice cream. But that leaves needed nutrients lacking, and stamina drops further still.

Here, recall the heart of the Zen meal practice connected also to esoteric Buddhism — the *Verse of Five Contemplations (gokan no ge).* This is the practice of reflecting, before a meal, on how much labor and blessing brought this one meal to you, and eating with gratitude.

Rather than bolting it down hurriedly, savor it mouthful by mouthful, chewing well. Eat carefully with a grateful heart, and the pace naturally slows, easing the burden on the digestive organs. Even a small amount brings satisfaction — a way of eating gentle to a weakened stomach.

I know this myself. On a day with no appetite from the heat, I tried being just a little more mindful than usual, chewing slowly mouthful by mouthful. Then the taste of the food, which I'd never noticed while merely gulping it down, suddenly rose up, and oddly I felt *I might be able to eat a little more.* It was an event that made me feel that just by changing how you eat, appetite itself can return.

Practice 5: At Night, "Warm the Feet, Cool the Head" to Order Sleep

On stifling summer nights, devices to order sleep quality are indispensable. Useful here is the Eastern regimen idea of *cool head, warm feet (zukan sokunetsu)* — keeping the head cool and the feet warm.

Over-chilling the room with air conditioning instead chills the toes and worsens falling asleep. Meanwhile, with the head still flushed, it is hard to enter deep sleep. So:

• Before sleep, lightly warm the feet with lukewarm water (a footbath is fine).
• Don't over-chill the room temperature; devise to keep only around the head cool.
• Before sleep, avoid screen light, lower the lighting, and calm mind and body.

By ordering the temperature balance of feet and head this way, the body's deep core temperature falls naturally, and it grows easier to enter sleep smoothly. The flow Kukai valued — *order the body and calm the mind* — comes alive in nighttime bodywork too.

Practice 6: At the Day's End, Turn "Gratitude to the Body"

The last practice is to turn gratitude toward your own body, which worked hard moving through the heat. At the center of Kukai's esoteric Buddhism is *hoon* — the heart of repaying the kindness received.

We tend to treat an ailing body like *a troublesome nuisance,* turning a blaming feeling on it: *heavy, won't move.* Yet within the harsh environment of heat and air conditioning, the heart still keeps beating, sweat regulates the temperature, and the body keeps us alive all the same.

At the day's end, in your bedding, in your heart alone is fine. Gently speak to your own body: *you worked hard today too — thank you.* Just by shifting your view from blaming the body to a body to be thanked and cared for, the tension of the heart loosens and recovery quickens too.

Summer fatigue is not something to push through by willpower. It is something to restore carefully, with mind and body as one. Today, begin first by changing the morning cup to warm water, or with a few deep breaths before sleep. Within each of those small acts of bodywork, the wisdom Kukai taught — *order the body and restore the mind* — breathes quietly on.