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Is Fitness All in the Genes?

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https://well.blogs.nytimes.com/2011/03/16/is-fitness-all-in-the-genes/

well.blogs.nytimes.com

Is Fitness All in the Genes?
Why do some people respond to an aerobic workout routine by becoming incredibly fit, whereas others who exercise just as hard for months end up no fitter than when they began? That question has bedeviled countless people who've started exercise programs. It has also motivated a major new study of the genetics of fitness.

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Fitness in Our Genes

A new study on the genetics of fitness is trying to find out if the body's receptivity to exercise is genetic or not.

The researchers have looked at thousands of individual segments of DNA, ...

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Gene For Metabolizing Fats

A particular gene known as ACSL1 seems to play a role in how a body metabolizes fats and subsequently affects exercise response.

The findings, though preliminary, do point towards exercise b...

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Ancestry testing

DNA-testing is done by millions of people all over the world to analyze their DNA and find out where they originate.

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DNA home tests

Some problems arise regarding DNA home tests about what happens after the results of land.

  • Storage of sensitive genetic information. An open-source DNA testing site was recently used by the police to identify a killer.
  • Emotional side effects after receiving confusing or life-changing results.

DNA home test variances

Many who have done a DNA home test begin to question their family heritage and wonder if they might have been misled. However, taking DNA tests from different companies reveal wildly varying results. There are a few reasons for this: 

  • The companies are only looking at very recent DNA samples, from a relatively small group, in one specific database.
  • The databases are skewed towards different parts of the world. Some have more American customers and other more British or Australian customers.
  • These companies don't ask about the genetics of the past, and which of those past inferred genetic clusters we get our ancestry from.
  • We probably inherit very few genes from our ancestors. DNA is inherited in “chunks” that break up the further back in time you go.
  • There are ancestors from whom you inherit no DNA.

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Exercise Defined

Exercise is a  movement of the body to enhance physical fitness. 

Most people know that exercise is important for the physical development of the self, yet a majority of them are sk...

Decrease in Human Strength

Historic evidence suggests that for many thousands of years, human beings were more active and stronger than today. 

The early humans had increased movement and activity, like going for long and tiring hunts, walking long distances that took weeks, making the prehistoric humans fitter than the best athletes today.

Technology as the Culprit

Technological breakthroughs have reduced our activity to a great extent ( vacuum cleaners, washer-dryers, self-cleaning ovens, and even cars).

The rise of the internet gave us a whole lot of technology, curbing our need to move even more.

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Different Outcomes

Different Outcomes

We're all different. If we are all on the same weight-loss diet, there will be various outcomes. Some people will lose a lot, some will lose a little, and a few will even gain weight.

Science...

Genetics And Nutrition

Scientists are continually finding links between genetics and nutrition. Many of us have a gene called FTO that makes us more likely to be overweight. You can get a genetic test to tell which variant of the FTO gene you happen to have.

However, scientists who study the genetics of nutrition think it’s premature to base nutritional advice on your DNA. That FTO gene, for example, has only been shown to make a few pounds’ difference in body weight.

Nutritional Genetic Testing

The coded messages of your DNA are billions of letters (nucleotides) long. Personalized nutrition companies only care about a few of your DNA letters and can tell you which "variant" you have at each of those locations (known as SNPs) along your DNA strands.

Genetic testing companies can learn what SNP variants you have by supplying them with a vial of spit.

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