Inspired by watching episode 5 of the Human Longevity Project we, at Bulletproofbodies dived into the research about exercise and Circadian Rhythm.

Circadian Rhythm is any biological process that displays an oscillation of hormonal activity around a 24 time period of day and night.

 These 24-hour rhythms are driven by a circadian clock.

The research listed below has highlighted that you can recover in a more optimal way if you do your High Intensity Training in the EVENING rather than the morning.



RESEARCH:

Interactions of cortisol, testosterone, and resistance training: influence of circadian rhythms. https://www.ncbi.nlm.nih.gov/pubmed/2…
Effect of time-of-day-specific strength training on serum hormone concentrations and isometric strength in men. https://www.ncbi.nlm.nih.gov/pubmed/1…
Circadian Rhythms in Exercise Performance: Implications for Hormonal and Muscular Adaptation https://www.ncbi.nlm.nih.gov/pmc/arti…
Effect of time-of-day-specific strength training on maximum strength and EMG activity of the leg extensors in men. https://www.ncbi.nlm.nih.gov/pubmed/1…

So there you have it.

HIIT (High Intensity Interval Training) it in the evening.

Video: https://www.youtube.com/user/drericberg123