Body mindfulness is a great antidote to the racing mind and the constant presence of the smart phone. We first called them mobile phones (cell phones), then smart phones, but what they really are now is mobile computers that can take phone calls. A lot of our contact is not done by voice calls as much anymore. So you are carrying around a computer in your pocket which is always-on and always with you, probably 24/7. The intellect loves interacting with this device, and it represents the outward manifestation of the racing over used mind.
When we use this device we go into our head and our body goes on hold. There is little movement in your body and you are probably breathing very little (unless you are dealing with something very emotional or exercising at the time). You cut off your conscious awareness of your body to use this device. If this is overdone, it can create health problems, relationship problems as well as feeling lost in your head.
When your body is divorced from the decisions you make in your head you lose a lot of intelligence, creativity, you add stress to your thinking process, (so it takes longer to see things clearly) and so you lower your ability to make smart decisions.
Staying in constant contact with your body is crucial to better health and better decision making.
The mobile computer works fast, requiring you to think fast to keep up with it. Connecting with your body is slow, forcing you to slow down and take more care of the present moment. But what may seem slow is actually very fast and efficient in the long term and you get there with much less drama, less waste of energy/resources (less dead ends, less of the long way around to get there) and arrive healthier and happier along the right path for you.