Heyman Heyman E E Gamelin Gamelin FX FX Goekint Goekint M M Piscitelli Piscitelli F F Roelands Roelands B B Leclair Leclair E E Intense exercise increases circulating endocannabinoid and BDNF levels in humans-possible implications for reward and depression Intense exercise increases circulating endocannabinoid and BDNF levels in humans-possible implications for reward and depression Psychoneuroendocrinology Psychoneuroendocrinology 2012 2012 06 06 37 37 6 6 10.1016/j.psyneuen.2011.09.017 10.1016/j.psyneuen.2011.09.017 844 844 51 51 22029953 22029953. Here, BDNF is linked to depressive symptom measurement.