Moderate intensity running or cycling increases endocannabinoid levels, particularly when reaching 70-80% of maximum heart rate.

“humans naturally produce cannabinoids called endocannabinoids and some endocannabinoids such as an on demand are produced upon exercise endocannabinoids are able to cross the blood-brain barrier and they may be responsible for part of the euphoric feeling that we associated with exercise”

“people that engage in moderate intensity running or cycling increase their endocannabinoid levels and this especially holds true when people reach around 70 to 80 percent of their maximum heart rate”