Biohacking basics. Breathing - by improving the quality of the air we breathe, we give ourselves a few extra years of life Breathing exercises: 1. Inhale for 2 seconds. 2. Exhale for 4 seconds. 3. Hold your breath for 4 seconds. At the same time you will feel a feeling of lack of oxygen - this is normal. This type of exercise is excellent for bronchitis, pneumonia, adenoiditis, skin pathologies, Raynaud's disease, obesity, rheumatism and many other diseases.