New Technique to Help Feel Pain in Virtual Reality

An employee sits inside a virtual reality connected car cockpit
built by Segula Technologies during the first press day ahead of the
85th International Motor Show in Geneva March 3, 2015. (Photo by Arnd
Wiegmann/Reuters)
An employee sits inside a virtual reality connected car cockpit built by Segula Technologies during the first press day ahead of the 85th International Motor Show in Geneva March 3, 2015. (Photo by Arnd Wiegmann/Reuters)
TT

New Technique to Help Feel Pain in Virtual Reality

An employee sits inside a virtual reality connected car cockpit
built by Segula Technologies during the first press day ahead of the
85th International Motor Show in Geneva March 3, 2015. (Photo by Arnd
Wiegmann/Reuters)
An employee sits inside a virtual reality connected car cockpit built by Segula Technologies during the first press day ahead of the 85th International Motor Show in Geneva March 3, 2015. (Photo by Arnd Wiegmann/Reuters)

After a quantum leap in the digital tech industry over the two past decades, many of us sarcastically said: "The only thing we still miss is the ability to share a meal with the characters in a movie, or to feel what they feel."

However, it seems that the technological progress knows no sarcasm. All the imaginary ideas that people have now, or those they didn't have yet, may soon become a reality that we live.

This is at least what the modern innovations taught us. A team from the Tomsk State University in Russia, announced it has designed a new device that allows humans to feel the "beats," "burns," and even "tinkling" in virtual reality. According to a press release by the university, the new technique can be used in video games.

In addition, the researchers are currently developing their technique so it allows people to feel illusory motions, like when a mosquito settles on their skin or someone draws on their bodies, for instance.

The research team cited several devices that are currently used to transmit the sense of pain in virtual reality; these devices have a wearable skeleton-like structure that transmits the "sense" to the muscles through electric stimulation.

The researchers say the new device is based on the same concept, but it targets the skin without exposing the muscles to an electric pulse.

Researcher Andre Kostornoy, supervisor of the new innovation, said: "The new device affects a precise area of the skin," and stressed "the need for personal settings for each user based on his level of resistance to electrical pulses."

He explained that the principle adopted in the transfer of sensation is based on the same mechanism of brain function. It processes the signal coming from the skin, thereby obtaining a sense of touch, and draws the image of the material or device that comes into contact with the skin at the right moment.

Kostornoy said his team is working on improving the performance of the device so it becomes able to induce a sense of interaction with movements, objects, and characters, like "feeling the touch of another person's palm, for example."

The researcher said "developing this device is a promising achievement that would help control robots through signals communication."



Should You Stretch before Exercise? After? Never? Here’s What to Know

 Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
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Should You Stretch before Exercise? After? Never? Here’s What to Know

 Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)
Philadelphia Eagles stretch as they get ready during practice at NFL football training camp, Thursday, July 25, 2024, in Philadelphia. (AP)

For many people of a certain age, high school gym class began with reaching for their toes. Then, over the years, we were told it was better to stretch after exercise.

It turns out, both those things can be true, but the differing advice has created some confusion.

Stretching can help make you more flexible, improve range of motion in your joints — and feel good. David Behm, who researches human kinetics at Memorial University of Newfoundland in St. John’s, Canada, offers this advice on when to stretch and how to do it safely:

Warm up first

It’s almost always good to stretch, but it’s better if you warm up first, said Behm, author of "The Science and Physiology of Flexibility and Stretching." He recommends a light aerobic activity such as jogging, walking or cycling for five or 10 minutes.

Follow that with some static stretching, the traditional way of reaching and holding a position (think back to that gym class). You can then do activity-specific dynamic stretching, in which you warm up the muscles with repetitive movements like leg lifts.

Behm says one minute is "the magic number" for how long to do static stretching per muscle group without fatigue.

Expand your definition of 'stretching'

Should you always stretch before exercising? If it's traditional stretching, not necessarily.

The better question, Behm says, is, "Should people increase their range of motion? Should people have better flexibility? And that is yes, because it helps prevent injuries. It helps with health. But you don’t have to stretch to achieve that."

Resistance training, for instance, can be an effective form of stretching, he said. Doing a chest press increases range of motion in your deltoids and pecs, whether with barbells, dumbbells or machines, so there is no need to stretch beforehand. Just make sure to start with a small amount of weight to warm up and then add more to train.

"You probably don’t have to do extra stretching unless you’re a gymnast, a figure skater, or even a golfer who needs a great range of motion through that swing," Behm said.

Nor do you need to stretch first if you’re going for a leisurely run. Simply start with a slow jog to warm up and then increase the pace.

Don't do it if it hurts

After exercise, "light stretching is OK, as long as you don't reach a point where you're feeling pain," Behm said. Since your muscles will be warm by that point, overdoing it makes you more likely to injure yourself.

Foam rollers can help with muscle recovery and have been shown to increase range of motion as well as stretching.

Do some static stretching before sports

If you’re playing a sport, Behm said, static stretching beforehand helps reduce muscle and tendon injury.

"If you’re going to do an explosive movement, change of direction, agility, sprint, any of these explosive activities that involve your muscles and tendons," he said, "you’re going to be stronger if you do static stretching."

People can especially get in trouble when they go back to a sport they used to play, whether it's tennis, surfing or any sort of team activity.

Also, stretch both sides equally. Lacking flexibility on one side also can lead to injury.

Sounds simple. Why all the confusion? Different studies over the years have either encouraged or discouraged stretching before exercise. Behm says that partly because some studies didn't reflect real-life conditions, or were designed with elite athletes in mind, not regular people.

"If you’re Usain Bolt, it makes a difference," said Behm. Not so much for the rest of us.