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These videos will make you want to work out
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Exercise should be a get-to, not a have-to, but sometimes we all need a little kick to get going. Here are five videos guaranteed to make you want to lace up your shoes. - photo by Jennifer Graham
Exercise should be a get-to, not a have-to, but sometimes we all need a little kick to get going because of Newton's First Law of Motion: A body at rest will remain at rest unless an outside force acts on it.

There are all sorts of outside forces that can get us going, like a frowning doctor or a laughing scale, but an inspirational video is much more pleasurable. Here are five that will make you want to lace up your shoes and start moving.

She's 101, what's your excuse?

The Penn Relays is the longest-running track event in the U.S., dating to 1895. Ida Keeling isn't that old, but she just turned 101, and she's now the world record holder for the 100-plus age group in the 100-meter distance.

Keeling started running when she turned 67. Here's her record-setting performance at Penn. And the push-ups she did after she finished.

'You are not a marathon runner'

But you may be, after watching Nike's salute to the back of the pack. The song is "Every Little Bit Hurts" by Aretha Franklin. The runner is anybody who's ever been pounding the streets long after the winner has already eaten the bagel, accepted the trophy and showered.

You are also not a horse

But to watch Secretariat win the Belmont Stakes in 1973 is to marvel at God's creation operating in peak form, and to wonder if you, too, shouldn't get off the couch and start working to attain the height of your physical gifts.

The announcer says it was "a record that may stand forever," and 42 years later, it still holds.

But what you do in the dark ...

Under Armour's "Rule Yourself" series movingly reminds us that Patriots superstar Tom Brady was the 199th pick in the sixth round of the 2000 draft, but Michael Phelps gets more time to show how he earned 22 Olympic medals by grunting it out, lap after lap. You won't be the same after watching it, SwimSwam magazine promises.

Makes it count

Casey Neistat's quirky video for Nike had little to do with working out, but everything to do with why people do it. Watch him run around the world in 10 days sustained by street vendors and gnarly airplane food and you'll want to do it, too. Do more, indeed.
Its toxic: New study says blue light from tech devices can speed up blindness
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A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers. - photo by Herb Scribner
It turns out checking Twitter or Facebook before bed is bad for your health.

A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers.

That process can lead to age-related macular degeneration, which is a leading cause of blindness in the United States, according to the researchs extract.

Blue light is a common issue for many modern Americans. Blue light is emitted from screens, most notably at night, causing sleep loss, eye strain and a number of other issues.

Dr. Ajith Karunarathne, assistant professor in the UT Department of Chemistry and Biochemistry, said our constant exposure to blue light cant be blocked by the lens or cornea.

"It's no secret that blue light harms our vision by damaging the eye's retina. Our experiments explain how this happens, and we hope this leads to therapies that slow macular degeneration, such as a new kind of eye drop, he said.

Macular degeneration is an incurable eye disease that often affects those in their 50s or 60s. It occurs after the death of photoreceptor cells in the retina. Those cells need retinal to sense light and help signal the brain.

The research team found blue light exposure created poisonous chemical molecules that killed photoreceptor cells

"It's toxic. If you shine blue light on retinal, the retinal kills photoreceptor cells as the signaling molecule on the membrane dissolves," said Kasun Ratnayake, a Ph.D. student researcher working in Karunarathne's cellular photo chemistry group. "Photoreceptor cells do not regenerate in the eye. When they're dead, they're dead for good."

However, the researchers found a molecule called alpha-tocopherol, which comes from Vitamin E, can help prevent cell death, according to Futurism.

The researchers plan to review how light from TVs, cellphones and tablet screens affect the eyes as well.

"If you look at the amount of light coming out of your cellphone, it's not great but it seems tolerable," said Dr. John Payton, visiting assistant professor in the UT Department of Chemistry and Biochemistry. "Some cellphone companies are adding blue-light filters to the screens, and I think that is a good idea."

Indeed, Apple released a Night Shift mode two years ago to help quell blue lights strain on the eyes, according to The Verge. The screen will dim into a warmer, orange light that will cause less stress on the eyes.