Physical activity, mindfulness meditation, or heart rate variability biofeedback for stress reduction: a randomized controlled trial
Applied Psychophysiology and Biofeedback (2015) - Comments
pubmed: 26111942  doi: 10.1007/s10484-015-9293-x  issn: 1090-0586  issn: 1573-3270 

Judith Esi Van Der Zwan, Wieke De Vente, Anja C. Huizink, Susan M. Bögels, Esther I. De Bruin