Immune Reboot: programme 10, hardening by the numbers
Programme 10 of the longevity resort: contrast heat, salt steam and oxygen train the barrier immunity, while six numbers from the night keep the dose in check.
What it is. Immune Reboot is the tenth of the platform's ten longevity programmes. It does not treat an infection and does not promise to «boost immunity»: it gives the body a measured temperature stimulus and watches the numbers so that the stimulus never turns into overload.
How long it runs. The base stay is 10 days, the minimum is 5. A shorter stay is still built, but the plan says plainly that the course is cut short.
What it stands on. Six markers from the Garmin Forerunner 165 Music watch: heart rate variability (HRV), resting heart rate, respiration rate, blood oxygen saturation (SpO₂), sleep score and Body Battery — the day's energy reserve.
The core of the course. Sauna world three times a week, cryo-hydrotherapy twice, mineral inhalations three times, iodine-bromine baths twice, oxygen therapy twice, Nordic walking four times and the swimming pool four times a week.
What ten days add up to.7 diagnostic items, 27 procedure sessions, 10 walks totalling 480 minutes and 30 servings of mineral water.
What it costs.16,340 CZK (≈ 654 EUR at 25 CZK to the euro) — the treatment part of a ten-day stay at the hotel's 2026 price list, accommodation excluded. Sauna world and the pool stand at zero in that sum: they are included in the stay.
Who decides. The algorithm drafts, the doctor signs. The day-one examination is always in the programme, and no heat treatment starts before it.
Who this document is for. Resort doctors, spa coordinators and the reception desk; and for the guest, to see what the bill is made of. Updated 22.08.2026.
Hardening is the one resort programme where benefit and harm sit on the same scale: the same temperature stimulus, overdosed, works the other way. So the programme does not rely on «tests at the end» — it relies on six numbers the watch takes every night and every morning.
Four of the six have a threshold in the hotel's rules, and the doctor can move it in the admin panel: the platform does not hide the figure in code. Respiration has no threshold of its own — it is read by the doctor and goes into the morning sheet as context, not as a flag.
Marker
What it says during hardening
Default threshold
What follows from it
HRV, ms (night heart rate variability)
How well the autonomic nervous system takes the temperature stimulus. Holding inside the guest's own corridor or rising means the adaptation is working
A drop of 15 % against the guest's own average (adjustable between 5 % and 40 %)
A strain flag: today's heat is removed from the plan, the walk is shortened
Resting heart rate, bpm
The early sign that the heat load has outgrown the guest's adaptive capacity, or that inflammation is starting
A rise of 5 bpm against the guest's own stay average (2–15)
The same strain flag; three days in a row adds a «review the programme» line
Respiration, breaths per minute
The state of the bronchial tree and nasal breathing: it shows what the inhalations and the oxygen are doing
No threshold — the number is read by the doctor
Goes into the morning sheet and the state-by-state view as context for a complaint
SpO₂, % (blood oxygen saturation)
The barrier function of breathing. At rest it usually sits at 95–100 %; below 90 % the portal counts it as low
90 % for the night; repeated — 2 nights in a row
A safety fuse: not a prescription but a «show this to the doctor before today's treatments» line
Sleep score, points
The night in which the recovery from the heat load actually happens
Below 60 points, or shorter than 6 hours
An evening-protocol hint in the sheet; sleep is worth 25 points out of 100 in the readiness score
Body Battery, points
The day's energy reserve: heat sessions spend it faster than a walk does
Below 40 points by the morning
A strain flag; the reserve is worth 30 points out of 100 in the readiness score — more than any other component
«My states» of the demo guest in a browser window: sleep 4:42 with a score of 53, pulse variability 33 ms marked Unbalanced, resting pulse 61 bpm, blood oxygen 92 % with a low of 88, breathing 14.6 per minute×The blood oxygen page: last reading 93 %, the bands 90–100 / 80–89 / 70–79 and the note that a single low spot-check is not a verdict, while a day that stays low is worth a conversation with the doctor×
What the guest sees in the portal
The guest installs nothing: they scan a QR code at the desk and open the portal in the phone browser. The doctor opens the same address on a monitor — the same page, wider, with the section column on the left (how signing in works).
The first page carries the day's rings, «Today's report» with a readiness figure and the state-by-state breakdown. For the demo guest in the screenshot that is 48 out of 100 and the line «Rest — the doctor decides»: variability is 33 ms, 19.9 % under their own 41.2 ms, and the night's lowest oxygen is 88 % against a threshold of 90 %. For a hardening programme this is exactly the day when the sauna comes off and the conversation with the doctor happens before the treatments, not after.
One rule matters on that screen: every number carries its own date. Sleep, HRV, respiration and oxygen belong to the night just past, while steps, stress, calories and the energy reserve build up from midnight. A doctor reading them as one snapshot gets the wrong picture — and the portal says so on the page itself (the first page explained).
The demo guest's LONGEVITY first page: the day's rings, a report of 48 out of 100 with the line «Rest — the doctor decides», and the state-by-state column on the right — sleep, HRV and oxygen, each with its own explanation×
The medical skeleton: how the stay opens and closes
Diagnostics in this programme do not compete with treatments for slots: the skeleton places them itself and the slots are filled by the core. That makes the schedule predictable from guest to guest — here it is in full, with durations from the treatment catalogue.
For a guest over 60 the skeleton adds an ECG on day one. Blood is scheduled for day two, but the plan says it honestly: the exact day is set by the reception desk, because the nurse works to her own rota.
Day
What the skeleton places
Why
Day 1, arrival
Medical examination (30 min), drinking cure prescription (15 min)
No treatments at all on the arrival day. The examination settles the programme's main question: may this guest have heat and cold
Day 2, diagnostic
Blood laboratory panel (15 min for the draw), InBody body composition analysis with a consultation (30 min)
The reference point of the stay. The core starts the same day: inhalation, pool, sauna world in the evening
Day 6, mid-course
Interim doctor's consultation (20 min)
Placed in stays from ten days: by mid-course it is already visible how the nights answer the heat
Day 9, the day before departure
Repeat InBody (30 min)
So that the closing conversation has two numbers and not one
Day 10, departure
Closing consultation (20 min)
The departure day is morning only: the treatment rooms manage until noon, after that the guest has a suitcase
«Day by day» in the portal: day two of Immune Reboot expanded — blood, InBody, Nordic walking, inhalation, pool and the evening sauna world, with catalogue durations and prices; day seven is marked as a light day×
What the course is made of: procedures and doses
The core of the programme is seven items and the extras are five more; the frequencies in the table are weekly, and the engine spreads them across the days itself, keeping the gaps between sessions and the limit of one demanding treatment a day.
Two core items — sauna world and the pool — cost nothing: they are included in the stay. That is why the thermal core does not get more expensive as it gets larger, while the paid part rests on diagnostics and balneology.
Treatment
Frequency
Duration and price
Why it is in this programme
Sauna world (bio, Finnish, salt, steam)
3 times a week
60 min, included
The main temperature stimulus of the course. The first item the night loop removes when the strain shows
Cryo-hydrotherapy
2 times a week
10 min, 620 CZK
The cold contrast to the heat. The only demanding item of the programme — scheduled in the morning and never on consecutive days
Mineral water inhalation
3 times a week
10 min, 250 CZK
Moistening the upper airway lining and draining the bronchi: work on the very barrier the programme trains
Iodine-bromine bath
2 times a week
20 min, 650 CZK
Gentle balneology between the heat days: trace elements through the skin without a thermal load
Oxygen therapy
2 times a week
50 min, 550 CZK
The item the course falls back on when the morning carries flags: it gives breathing work without loading thermoregulation
Nordic walking (guided)
4 times a week
60 min, 350 CZK
Aerobic ventilation of the lungs on the pine wellness trails and the weekly Zone 2 minutes
Swimming pool
4 times a week
60 min, included
General hydrodynamic work and gentle hardening by water
H₂ hydrogen therapy
up to 2 times a week
30 min, 550 CZK
An extra: oxidative stress after a run of heat days
Pearl bath
up to 2 times a week
15 min, 600 CZK
First in the swap row when a demanding treatment has to become a calm one
Foot whirlpool bath
up to 2 times a week
15 min, 550 CZK
Local hydrotherapy without systemic overheating: it fits a day with a low energy reserve
Classical massage
1 time a week
20 min, 650 CZK (50 min — 1,150 CZK)
Recovery between the demanding days
Hydroxeur massage bath
1 time a week
15 min, 600 CZK
Gentle hydrotherapy on a heavy day
Deviation, prescription, mechanism
The table below is a working one: on the left is what the portal sees in the markers, on the right is what the course answers with. It describes the logic of a prescription, not an automation: paid items are placed by the doctor.
What the markers show
What goes into the plan
Mechanism
Shallow, frequent breathing; the guest reports frequent colds
Inhalations 3 times a week, oxygen therapy twice, Nordic walking four times
Moistening the mucosa and draining the bronchi, plus respiratory muscle work on the trail: the upper airway barrier only works while it is moist
Blood oxygen below 90 % overnight
Nothing is placed: a «show this to the doctor» line before today's treatments
This is a fuse, not a prescription. Two low nights in a row are marked separately — a thermal load is not prescribed over unexplained hypoxia
HRV under the guest's own corridor, resting pulse above the usual
Sauna world is removed from today, the walk is 30 % shorter, and a demanding item gives way to oxygen or a calm bath
The temperature stimulus is postponed by a day: the autonomic system needs that day to bring variability back into the corridor
Sleep score below 60 points, short nights
Hydrogen therapy, classical massage, the pool in the second half of the day
Calm items instead of hot ones: the night after a sauna is shorter, and the course would be working against itself
Body Battery does not charge by morning
Foot whirlpool bath, Hydroxeur, a shorter walk
Local hydrotherapy without systemic overheating keeps the reserve for tomorrow's heat day
The demo guest's breathing page: the daily curve with the sleep band shaded, a low of 12 and a high of 21 breaths per minute, a waking average of 16 — this is the curve the doctor reads the inhalations from×
The table, the water and the walk
Three things run every day and take no treatment slots: the table, the drinking cure and the walk. The table for this programme is the regular one — hardening does not ask for restriction, it asks for resource.
The drinking cure is three servings of mineral water of 150 ml each, 15–30 minutes before a meal, thirty servings over ten days: the classic Karlovy Vary order of the day, water first and food after (how the drinking cure works).
The walk is 480 minutes over ten days, about 50 minutes a day on a category II trail with a target of 8,000 steps. The portal leads it: the route line on the map, turns by voice and the heart rate corridor on the watch (how the corridor works).
Protein in every meal.
Half the plate is vegetables.
No late dinner.
Chew slowly — the rule shared by all three tables of the resort.
Contraindications: what is removed by itself
The guest marks contraindications in the questionnaire, and the doctor corrects them at the day-one examination. A treatment carrying a marked flag never enters the plan: the portal does not argue with a restriction and does not offer to «try it carefully». In a hardening programme this rule bites harder than in its neighbours: two thirds of the core carry cardiac flags.
Acute heart condition or uncontrolled hypertension — sauna world and cryo-hydrotherapy are removed, which is the whole temperature contrast. The course does not fall apart, but the immunity share drops from 12 % to 6 %, and that is visible in the plan itself.
Hyperthyroidism — the iodine-bromine bath is removed.
Pregnancy — sauna world, cryo-hydrotherapy and the iodine-bromine bath are removed.
Pacemaker or metal implants — cryo-hydrotherapy is removed.
Acute skin conditions — sauna world, the iodine-bromine bath, the pool, the pearl and foot baths and the Hydroxeur are removed.
Acute illness — the plan prints a «see the doctor first» warning and removes cryo-hydrotherapy and classical massage. Heat in that case is removed by the doctor at the examination: the catalogue gives sauna world cardiac, skin and pregnancy flags, but no acute illness flag.
What remains. The removed items give their place to the extras — oxygen, inhalations, calm baths, the pool and walking — and the plan prints the list of what was excluded.
The night loop: how the course eases off
Hardening is controlled stress, and the portal watches it at night. No earlier than 06:00 the night just past is compared against the guest's own average (their own corridor needs at least two days to build), and the morning sheet receives the flags: resting pulse above the usual, variability below it, Body Battery not charged, sleep debt, accumulated load.
The boundary of authority was set by the platform's owner: what is free and our own the portal changes itself, what is paid it proposes to the doctor (the thresholds and flags in full).
Heat comes off first. Sauna world is free and ours, so on a day with flags it leaves the plan automatically; the guest can put it back, the button is there.
The walk is 30 % shorter, but never below 20 minutes and never twice in one morning.
A paid demanding treatment is swapped only with the hotel's toggle on, and never more than two items a day. For cryo-hydrotherapy the swap row is oxygen therapy, floating, magnetotherapy — the first one that is not contraindicated and is not already standing in the same day.
Oxygen below 90 % does not lead to a swap but to the doctor: it is the only one of the six markers carrying a safety mark.
Three days in a row with a resting pulse or HRV flag put a «review the programme» line in the morning sheet. The programme is changed by the doctor, not by the night.
The stay plan and what it costs
The plan is built for the whole length of the stay at once: days, slots, minutes and price. A ten-day Immune Reboot is 7 diagnostic items, 27 treatment sessions, 10 walks over 480 minutes and 30 servings of mineral water.
The treatment part is 16,340 CZK (≈ 654 EUR). The largest lines: two doctor's consultations 2,200 CZK, the entry examination 2,000, two InBody analyses 2,000, five Nordic walks 1,750, the blood panel 1,500, two iodine-bromine baths 1,300, two cryo-hydrotherapies 1,240, two oxygen sessions 1,100. Sauna world four times and the pool six times are included. Accommodation is counted separately, from 2,900 CZK a night in a standard room; the city tax of 50 CZK per person over 18 per night is paid at the reception desk.
The portal also shows the share of each longevity pillar: heart and vessels — 29 %, metabolism — 19 %, stress and sleep — 17 %, muscles and joints — 14 %, immunity — 12 %, digestion and the drinking cure — 9 %. The immunity share is small on purpose: shares are counted by sessions, and the daily walk and drinking cure pull towards the heart and the gut. The five-day minimum of the course is 3 diagnostic items, 13 sessions, 230 minutes of walking and 7,270 CZK.
The cost calculator in the portal: fifteen price lines, included items without a price, a total of 16,340 CZK (≈ 654 EUR) and the choice of room — from 2,900 CZK a night×
The guest. Wears the watch, walks the trail, marks the water servings and puts the sauna back into the plan when they feel better than the night suggested. They install no app and open no account in anybody else's service.
The desk. Hands out the kit, lets the guest scan their personal QR code and returns the watch to the fleet at check-out (working with the apps).
The doctor. Examines on day one and settles the programme's main question — is this guest cleared for the temperature contrast; signs or corrects the plan, decides on paid items, reads the oxygen flags.
The spa coordinator. Books by the plan and moves bookings when a room is busy: the plan is a wish with opening hours, not the treatment rooms' timetable.
The portal. Drafts the plan, leads the walk, counts the water, checks the night and prints the morning sheet for the doctor (the morning round).
Questions and answers
How long does Immune Reboot run? The base stay is ten days, the minimum is five. A shorter stay is still built, but the plan marks it as a shortened course, and the interim consultation and the repeat InBody do not fit into it.
Which markers come from the watch? All six: night heart rate variability, resting heart rate, respiration rate, blood oxygen saturation, sleep score and Body Battery. For a guest with their own band the portal takes whatever that device provides and says so on the page.
What happens if the guest arrives with a cold? The acute illness flag in the questionnaire produces a «see the doctor first» warning and removes cryo-hydrotherapy and classical massage. The sauna is decided by the doctor at the day-one examination — it is not removed automatically.
What does the programme cost? The treatment part of a ten-day stay is 16,340 CZK (≈ 654 EUR) at the hotel's 2026 price list; a five-day one is 7,270 CZK. Accommodation is counted separately, from 2,900 CZK a night.
Who decides how much sauna to give? The engine proposes the frequency (three sessions a week, never on consecutive days), the doctor approves it, and each particular morning is corrected by the night loop: with strain flags today's sauna removes itself.
Sources
Laukkanen T. et al. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA Internal Medicine, 2015; doi: 10.1001/jamainternmed.2014.8187
World Health Organization, 2020. Guidelines on physical activity: 150–300 minutes of moderate aerobic activity a week. who.int
Paluch A. E. et al. Daily steps and all-cause mortality: a meta-analysis of 15 cohorts. Lancet Public Health, 2022; doi: 10.1016/S2468-2667(21)00302-9
Studies of cold exposure and brown adipose tissue activation — the grounds for cryo-hydrotherapy in a hardening course. Associations from cohort studies, not a promised result.
