Jeffrey Jaime explains why gym workouts alone don't work: sitting eight hours a day triggers metabolic damage that promotes obesity and diabetes. The fix is low-intensity movement throughout the day, like post-meal walks and exercise snacks, not just formal gym sessions.
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The brutal truth is that for many people, sitting for 8 hours a day does just not expend enough energy to counterbalance breakfast, lunch, and dinner and snacks, no matter how much exercise you're doing at the beginning or the end of the day. Even in people who exercise, say hit the gym before work or hit the gym after work, habitual sedentary behavior such as sitting at work all day long without moving is associated with metabolic syndrome, obesity, type 2 diabetes, cardiovascular disease, and premature mortality. The solution? Well, move more, especially when you're at work, which is when most people tend to move the least. While a formal hard gym workout at the beginning or the end of the day isn't technically necessary for weight loss, low-level physical activity throughout the entire day is, including things like pre- and post-meal walks and brief exercise snacks during the day like air squats, jumping jacks, or push-ups. Hack your environment in such a way that you're forced to constantly move.