A Temporary Tattoo That Lets Athletes Know When To Take A Break
University of California-San Diego researchers have created a wearable biosensor that measures lactate levels in sweat in real time. Future iterations could transmit data to a smartphone app via Bluetooth.
What's the Latest Development?
Joseph Wang and colleagues at the University of California-San Diego have created a biosensor that sticks onto the skin -- much like a temporary tattoo -- and measures the amount of lactate in the wearer's sweat in order to determine when they are about to "hit the wall" during vigorous exercise. It works by using an enzyme to oxidize the lactate, releasing a small amount of electrical current. The more lactate present, the larger the current. A device attached to the sensor measured the current during tests, but Wang says that in the future they hope to transmit the data wirelessly using Bluetooth.
What's the Big Idea?
Rising lactate levels are an early sign that a body's energy stores are waning, and precede the sudden fatigue often associated with hitting the wall. Often, lactate levels are measured via blood tests. A wearable biosensor that doesn't slide off during exercise is much more convenient, and tests showed that its readings were just as accurate as those taken by scraping sweat off test subjects and analyzing it in a lab.
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- Learn to recognize failure and know the big difference between panicking and choking.
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We take fewer mental pictures per second.
- Recent memories run in our brains like sped-up old movies.
- In childhood, we capture images in our memory much more quickly.
- The complexities of grownup neural pathways are no match for the direct routes of young brains.
In the face of seemingly unstoppable gun violence, Americans could stand to gain by looking to the Swiss.
- According to a recent study, the U.S. had the second highest number of gun-related deaths in 2016 after Brazil.
- Like the U.S., Switzerland has a high rate of gun ownership. However, it has a considerably lower rate of deaths from gun violence.
- Though pro-gun advocates point to Switzerland as an example of how gun ownership doesn't have to correlate with mass shootings, Switzerland has very different regulations, practices, and policies related to guns than America.
It's one of the most consistent patterns in the unviverse. What causes it?
- Spinning discs are everywhere – just look at our solar system, the rings of Saturn, and all the spiral galaxies in the universe.
- Spinning discs are the result of two things: The force of gravity and a phenomenon in physics called the conservation of angular momentum.
- Gravity brings matter together; the closer the matter gets, the more it accelerates – much like an ice skater who spins faster and faster the closer their arms get to their body. Then, this spinning cloud collapses due to up and down and diagonal collisions that cancel each other out until the only motion they have in common is the spin – and voila: A flat disc.
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