You only have so much innate willpower, according to scientists who used the classic Stroop exercise to measure, and deplete, the directed mental energy that is required to master tasks from studying to dieting and exercise. [link to Stroop test at U of Michigan]
"Cognitive tasks, as well as emotional tasks such as regulating your emotions, can deplete your self-regulatory capacity to exercise," said study leader Kathleen Martin Ginis, associate professor of kinesiology at McMaster University.
However, you can increase your will through exercise or practice, according to the researchers.
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