A recent review published last year in the journal Plos One found that spontaneous laughter leads to health benefits.

The article combined the results from eight separate studies to answer the question: Does spontaneous laughter reduce cortisol levels?

What is Cortisol?

Cortisol is an essential hormone that affects almost every organ and tissue in your body.

It’s produced by the adrenal glans and plays many important roles, including: maintaining blood pressure, supporting immune function, boosting metabolism, and helping you stay awake.

When you are under stress, your body produces more cortisol; therefore, it is a good measure of stress levels. Too much cortisol can lead to weight gain, digestive problems, muscle weakness, depression, and anxiety.

Universal Laughter and Deception

Laughter as Medicine

Since the 1970s, medical experts have learned that laughter can boost pain tolerance and improve overall well-being.

This recent meta-analysis identified eight studies in which participants were encouraged to laugh by watching a funny video, working with a laughter therapist, or participating in a self-administered laughter program.

Some of the studies measured participants’ cortisol levels before and after a laughter session and others included control groups, which measured cortisol levels of participants without laughter.

Combining the data, researchers found that cortisol levels fell by 31.9% for people who participated in laughter interventions — and even a single laughter session led to a 36.7% reduction in cortisol. It didn’t matter how long participants laughed; any laughter led to reductions in cortisol.

Their analysis concluded that “spontaneous laughter is associated with greater reduction in cortisol levels as compared with usual activities, suggesting laughter as a potential adjunctive medical therapy to improve well-being.”

Other Health Benefits of Laughter

This recent review builds on previous research that has found that laughter can improve your overall health, well-being, and life satisfaction.

Here are few studies and benefits of laughter:

• A 2018 review found that laughter and humor interventions appear to enhance well-being in older adults.
• Laughter is also found to improve mental health and bolster personal development.
• Evidence suggests that laughter helps improve cardiovascular health.
• Laughter can decrease pain perception. One study found that laughter therapy reduced pain scores of people living with terminal cancer by nearly half.

The take-home message: Laughter is good medicine, and there is data to prove it. So do your best to find opportunities to laugh and giggle as often as possible.

The post Why Laughter is Good for the Soul and Your Health first appeared on Humintell | Master the Art of Reading Body Language.

It’s amazing you can form such a strong bond with an animal who communicates with you exclusively non-verbally.

If you’re a dog owner, you know the joy of walking in through the door to be greeted by your pup excitedly wagging their tail.

But did you know that dogs are one of the few animals that use their tails primarily for communication?

Despite this fact, scientists still don’t understand exactly why dogs wag their tails. In a new paper published in the journal Biology Letters, researchers outline a few theories.

Most people equate tail wagging with a happy dog, but reality may be more complicated.

Take a look at more research out of the Canine Cognition Center here

There are many possible hypothesis for why dogs wag their tails and a couple of them are listed below.

1. Domestication Syndrome Hypothesis

This hypothesis relates to the human domestication of dogs, which began as early as 35,000 years ago.

Perhaps tail-wagging was a behavior that humans unintentionally selected for, because it was linked with other preferable traits, like tameness or friendliness toward people.

Tail-wagging may have simply been a byproduct of other specifically targeted characteristics.

2. Domesticated Rhythmic Wagging

This hypothesis suggests that humans consciously or unconsciously selected for tail-wagging during domestication, because they are drawn to rhythmic stimuli.

Tail Wagging 101

The new paper adds to the big-picture understanding of what scientists do and don’t know about tail-wagging.

The authors reviewed more than 100 studies about the behavior and summarized their findings: humans likely altered dogs’ tail wagging without realizing it.

According to the Washington Post, “the findings could flip the long-held belief that dogs are wagging their tails because they’re happy. Instead, Hersh and her colleagues suggest that dog tail-wags made people happy, so humans tended to select for that trait when welcoming dog ancestors into their lives and breeding the animal.”

Messages Conveyed by Tail-Wagging

Dogs also seem to wag their tails in different ways to convey different messages.

• Wagging more to the right means a dog is curious and wants to approach
• Wagging to the left is correlated with uncertainty
• Low tail wagging—where dogs pin their tails down against their back legs—is also linked with insecurity and submission

Interestingly, a study found that dogs began wagging their tails more than wolves when they were as young as three weeks old. And another study found that dogs wag their tails faster and more often than other canines.

Domestication of Dogs

Scientists have found that dozens of dogs’ traits and behaviors changed during domestication, including the appearance of their fur, ears, body size — and even their ability to make “puppy-dog eyes.”

In fact, eyebrows give dogs a wider range of human-like facial expressions we can identify with and they play a vital role in how dogs became “man’s best friend.”

Evolutionary psychologists even believe that centuries of domestication “transformed the facial muscle anatomy of dogs specifically for facial communication with humans”.

The post Research: Dogs Wag Their Tails To Make Us Happy first appeared on Humintell.