But what makes sloths so sedate? Sloths Take a Leisurely Approach to LifeThe sloth’s limited movements are primarily the result of their diet. With virtually no fat or protein in their meals, sloths conserve energy by taking a leisurely approach to life. With so little fuel to burn, a sloth makes the most of it. | Mark Newman/The Image Bank/Getty ImagesThere is, however, one major downside to the sloth's leisurely lifestyle.