Oh, and Wim Hof breathing. Just the breathing, for now.
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Never practice the breathing exercises in a place where it could be dangerous to faint.
Step 1: Get comfortable
Before you start practicing the breathing exercises, it is important to get as comfortable as possible. Sit in a comfortable posture in which you can expand your lungs freely. To make sure that you can expand your lung for the fullest, it is recommended to practice the exercises on an empty stomach.
Step 2: 30 power breaths
For this first breathing exercise, imagine that you are blowing up a balloon. While using your midriff fully, inhale through your nose and exhale through your mouth. Use short and powerful bursts. Close your eyes and repeat 30 times. You can become light-headed during this exercise or experience a tingling sensation. This is normal.
Step 3: Retention after exhalation
After your 30 power breaths, fill your lungs to maximum capacity, but don’t force it. Exhale and hold for as long as you can. Hold your breath without forcing it, until you experience the gasp reflex.
Step 4: Recovery breath
Inhale to maximum capacity and feel your chest expanding. When your lungs are full, hold your breath for 10 seconds. Release the breath, and begin a new round. Repeat 3 to 4 times.
Step 5: Enjoy the feeling
Take your time to enjoy the feeling that the breathing exercises invoke. This feeling is similar to the effects of meditation and will get more powerful when you practice more often.
1. Existing employee, so he was valuable to them, and had proven he could work shorter hours since he'd been there part-time initially when he was in university.
2. Willing to quit. In fact, what actually happened is he said "I quit", they said "but we don't want you to quit" and he said "how about 4 day workweek".
This is not a very reproducible method, but I've interviewed another person (for my book - https://codewithoutrules.com/3dayweekend/) who was somewhat early in his career. Again, he did it at his current job, with willingness to leave if necessary.