Personally, I find they are more health-conscious and likely to do some sort of exercise.
They may not have had the free-roaming childhood of many Gen-Xers where you spent all day out riding bikes and playing ball games in the street, but they seem more aware of the risk of sitting at an office job through the day, and then sitting in front of the TV in the evening.
They may not have had the free-roaming childhood of many Gen-Xers where you spent all day out riding bikes and playing ball games in the street, but they seem more aware of the risk of sitting at an office job through the day, and then sitting in front of the TV in the evening.