A loose definition of a cyborg is a blending of a biological entity with mechanical devices that enhance strength, toughness, intelligence, etc.
By this definition, I'm already a cyborg. I don't have hardware actually embedded in my body, but, via my smartphone, I have enhanced memory and data retrieval capabilities. I have Superman like powers to zoom overhead and get an aerial view of my surroundings. (Yesterday, while we were kayaking on the Haw, we wondered how much further we had to go to reach a resting point. A quick check of Google maps showed where we were and where the next rocky island was a half mile ahead of us.) I have communication abilities just one notch shy of telepathy. (Again, in the middle of a river, when I had my phone out to look at the map, I was also seeing email and facebook messages from friends, plus a message from the bike shop telling me my bike was ready to be picked up.)
More importantly to my health, the tiny computer I carry around helps me regulate my body. It lets me know how many calories I've eaten each day, and how many calories I should be eating in order to maintain my weight. It keeps track of how many miles I've traveled in a day, an month, a year, which gives me a motivational boost to keep moving to turn my personal odometer. I know I'll be hitting 1000 miles traveled via my own power soon, which means that I'm always planning my next opportunity to log some mile biking, hiking, or kayaking to get me closer to that goal.
I don't own a FitBit, but if I did it could keep track of not only my mileage, but my heart rate and sleeping habits. Of course, I already have technological assistance for sleeping, since I've now been using a CPAP for two full years.
The data revolution for our bodies is only beginning. Already, the technology to monitor blood sugar levels in real time is being perfected. Soon, we won't need to go to our doctor once or twice a year to get blood work done. A few simple sensors under the skin will be able to keep track of all aspects of our metabolism. Blood pressure, blood sugar, temperature, pulse... these won't be something we have to go out of our way to learn. We'll be able to access that data just by glancing at our phone. Assuming we even bother with something so crude as a phone. More likely, the data will just be floating in front of us anytime we want it, at first via devices like Google Glass, which will almost certainly soon be miniaturized into a contact lens, and later into ocular implants.
For people squeamish about the idea of implanting devices in their bodies, I suspect that cellphones will soon be miniaturized into patches that adhere to our skin.
The question is: Will all this technology actually make us healthier? Or will it just be an expensive distraction that keeps us from doing the things that really make us healthier? As mentioned, yesterday, in the middle of a river, instead of looking at the nature around me, I spent ten minutes reading my phone. I know a lot of people who spend more hours in a day on Facebook than they spend in a week on exercise.
Staying healthy into your golden years isn't all that complicated. Don't eat crap and keep active. I'm aware that formula won't prevent genetic illnesses or injuries or random diseases from striking you down, but it can forestall heart disease, diabetes, some cancers, and a whole host of other medical conditions.
I'm looking forward to increasing my use of high tech health related gadgetry. I would gladly agree to implant subdermal sensors to monitor my bodily functions. A chart of how many calories I actually burn on my bike rides would be fascinating. (I'm aware my phone can only do crude estimates.) A long term trendline showing how many hours of deep sleep I'm getting each night could definitely help me choose between reading one more article on the internet at night or turning off the light and going to bed. And life and intelligence could be preserved if monitors could alert emergency personal instantly if my real time vital signs showed I'd just been in a car wreck, or were in the early stages of a stroke.
But the technological investment that has had the greatest impact on my health? A good pair of boots.
For thousands of years, we've used clothing technology to regulate our temperatures, shield us from radiation, and to protect our feet from a wide range of hazardous terrains. Our cyborg future will merely be an extension of our cyborg past.