Samsung's mobile health app can now tell when you're stressed out

The Galaxy S5's heart rate sensor has mostly been handy for fitness gurus, but it's now helpful for the rest of us, too. Samsung has pushed out an update to S Health that uses the sensor to track stress levels; if your heart is racing after a bad day at work, you'll know. The app also tracks long-term trends, so it should be clear when you're overdue for a vacation. While S Health won't help you get rid of the annoying coworkers or personal dramas that cause stress, the app will at least make it clear that it's time to relax.

Read more..

via Engadget RSS Feed http://ift.tt/1tglBQH

This Video Shows What Caffeine Does to Your Brain and How Much Is Safe

Caffeine is a fascinating drug, one that many of us enjoy via coffee, tea, and other products. This video from the American Chemical Society is a quick look on how caffeine actually affects our bodies and how much is a safe dose .

Read more...

via Lifehacker http://ift.tt/1jnQQrM

Scientists make deep-brain implants possible through wireless charging

Stanford researchers have figured out a way to wirelessly charge electronic devices that are deep inside your body. Currently pacemakers and nerve transmitters need to have large receiving coils near the top of your skin to charge up (limiting where you can put them), or periodically have their battery replaced through surgery. This new method, however, would allow devices to be much smaller because they don't have to tote around such a huge battery. Also since they're not reliant on charging coils they could live much deeper in the body and brain.

Read more...

via Engadget RSS Feed http://ift.tt/1lWM30k