【Overview】
It is an application that supports sauna.
Just put on your Apple Watch and enter the sauna. It monitors your heart rate and vibrates to notify you of excess heart rate presets.
Since it is not necessary to manage the bathing time in detail and you can concentrate on the sauna, cold bath, and outdoor air bath, you can expect an improvement in relaxation effect.
You can check the bathing record on your iPhone and find a bathing method that suits you better.

[App functions]
(Apple Watch)
・ Measure your heart rate every second.
-Displays the heart rate visually.
-Vibrate to notify you of exceeding the upper / lower limit of your heart rate (which can be set arbitrarily).
-This application also supports execution in the background.

(iPhone)
・ The following information for each bath is displayed.
Bathing time, heart rate, calories burned, sweating amount
・ The following is displayed as the aggregated information of the above.
Total / average bathing time, maximum / minimum / average heart rate, total / average calories burned, total / average sweating

【 About fitness in sauna】
By repeating the sauna → water bath → outside air bath, “β-endorphin”, “oxytocin” and “serotonin” are secreted due to the warming and cooling effect.
This will give you a feeling of uplifting, well-being and stress relief.

【To do fitness in sauna】
Generally, you take a bath while measuring the bathing time of the sauna → water bath → outside air bath.
However, it is difficult to obtain a relaxing effect with this bathing method for the following reasons.
(1) The appropriate bathing time varies depending on the person / place, such as the temperature in the bathroom and the physical condition of the day.
(2) Too much awareness of bathing time management reduces the relaxing effect.

By using this app, (1) anyone can easily manage the bathing time based on the heart rate.
In addition, (2) it notifies you of the excess of the preset heart rate, so bathing time management is stress-free and you can concentrate on relaxing your mind and body.

【Points to note】
This app integrates with HealthKit to monitor your health and measure your heart rate.