Obesity epidemic, bad posture and other current issues are a reminder that our current lifestyle is way out of control. Technology evolved much faster than our bodies during the last 200-300 years. It's all fun and games when we're young but when we'll hit 40-50 we'll feel it.
If you don't actively try to exercise you can go literal months during which your physical activity will be: get out of bed, open a few doors, sit in a car, open a few doors, sit all day, open a few doors, sit in car, open a few doors, lay in bed.
That's killing us mentally and physically.