AUTHOR=Murphy Stephen L. , Eaves Daniel L. TITLE=Exercising for the Pleasure and for the Pain of It: The Implications of Different Forms of Hedonistic Thinking in Theories of Physical Activity Behavior JOURNAL=Frontiers in Psychology VOLUME=7 YEAR=2016 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2016.00843 DOI=10.3389/fpsyg.2016.00843 ISSN=1664-1078