Carbon dioxide tolerance is a valuable tool for assessing recovery; perform a CO2 tolerance test by inhaling deeply through your nose and exhaling slowly through your mouth.

You should rest between sets until your cardiovascular system is mostly recovered, you feel strong again, and your synergist muscles are not limiting your performance. If your target muscle is ready to perform at least five repetitions, then it's time to go again.

If you can't match or beat your previous performance in two consecutive sessions, it indicates that your cumulative fatigue is too high, and it's time to either deload or adjust your training volume to allow for recovery.

You can assess your recovery by testing grip strength, which indicates how well your nervous system is functioning after training; check your ability to generate force in grip strength when you first wake up, as it should improve throughout the day.

To recover effectively between sets, resting for two to six minutes can be beneficial for hypertrophy and strength gains.

The physiological sigh helps reinflate the small air sacs in the lungs, improving oxygen exchange and quickly reducing carbon dioxide levels, which relaxes the body.

The heart rate of divers slows significantly during dives, with some individuals experiencing drops of over 40 beats per minute in under 15 seconds, indicating a remarkable training adaptation.

Recovery and rest are crucial for performance; I prioritize sleep and active recovery techniques.

Physiological sighs can dilate the lungs and help offload carbon dioxide from the bloodstream, adjusting the ratio of carbon dioxide and oxygen effectively. Sometimes, just one physiological sigh is enough, but others may need two or three to achieve the desired calming effect.