Rick Uhlmann, ‘Clemson research: Bad sleep habits linked to higher self-control risks’, http://newsstand.clemson.edu/mediarelations/clemson-research-bad-sleep-habits-linked-to-higher-self-control-risks/, Clemson University (July 2, 2015).

Exercising

A sleep-deprived individual is at increased risk for succumbing to impulsive desires, inattentiveness and questionable decision-making. (…) Exercising self-control allows one to make better choices when presented with conflicting desires and opportunities.