“Our data suggest that diet-induced obesity is a cause, rather than an effect, of laziness. Either the highly processed diet causes fatigue or the diet causes obesity, which causes fatigue," he added.
To understand this, life scientists led by Blaisdell placed 32 female rats on one of two diets for six months.
The first, a standard rat's diet, consisted of relatively unprocessed foods like ground corn and fishmeal.
The ingredients in the second were highly processed, of lower quality and included substantially more sugar - a proxy for a junk food diet.
