"People who spend their free time sitting have a 20% higher death rate."
Even with all other factors taken into account (including diet and exercise), being entirely sedentary is a dangerous lifestyle. A series of studies by Mayo-Clinic researcher Dr. Ken Levine gauged the impact of inactivity by monitoring his subjects with a sensor apparatus that recorded their every movement. Even though the subjects all had the same caloric intake and were prohibited from exercise, some subjects -- those who unconsciously fidgeted or moved around more -- didn't gain weight. Conversely, occasional exercise doesn't quite offset being sedentary for long stretches, which decreases your insulin effectiveness and increases your risk for diabetes.
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