Announcement

Collapse
1 of 2 < >

Registrations

All new user registrations require email verification. Please make sure that micechat.com is not blocked. Approvals are done at least once per day, but they can't be done for accounts that have not verified their email address.
2 of 2 < >

Your Assistance Please

We need your help to battle spammers and also to keep our community user friendly.
PLEASE BE KIND TO OTHERS - Refrain from personal attacks. Avoid politics and harsh language whenever possible. If someone is violating our simple rules, DO NOT confront them, simply report the post.
STOP SPAMMERS - Report the post. DO NOT respond to them.

2017 is a year of renewal for us, we have lots of exciting changes on the way for you, but we don't have time to deal with trolls and spammers. If you find yourself suspended and need to plead your case, you will need to do so after your suspension. We are happy to address your concerns if you made a simple mistake. However, please note that those with a history of bad behavior and pushing our rules to the limit will not be given the courtesy of a reply.

MiceChat offers a number of ways for you to communicate and get involved. We offer Facebook Groups and Pages, Twitter, Instagram and Pinterest accounts. We have a front page filled with amazing content. We offer weekly meetups in the parks. Meets and events all over the world. Podcasts and videos. And we continue to maintain forums for your posting convenience. But with all those options, we can't be everywhere all the time. We need YOUR help. Please don't poke the trolls. Report posts and leave reputation. We'll do our best to keep the forums clean and active, but we can't do so without your help.

Thank you for your support folks, it's going to be a really fantastic year in the MiceChat world.
See more
See less

Does exercise shorten your life span?

Collapse

Ad Widget

Collapse
This topic is closed.
X
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Does exercise shorten your life span?

    I posted this in the Skeptics Club, but it's of general interest, so have a read: (From this science website)

    Does Exercise Age you more Rapidly?

    A great deal of literature suggests that there's an easy way to extend the lifespan of most animals: keep them from eating much. As long as essential nutrients are provided as part of the diet, a sharply limited input of calories can both extend the lifespan of many organisms and stave off some of the less pleasant symptoms of old age, including Alzheimer's-like symptoms. One of the outstanding questions regarding these findings has been one of mechanism: how does having as few as one-third the normal intake of calories feed into the processes that regulate an organism's life span?
    One of the ideas that's been floated as an explanation is that there's a relationship between caloric intake and oxidative activities in the cell. As a byproduct, these activities will produce a certain level of reactive oxygen that can cause damage to a cell's components. Given time, the accumulation of damage leads to the aging of the cells, and the organism as a whole. Even as this was proposed, there were a few obvious problems with it. For one, antioxidants in diets should block aging, but don't appear to do so. In contrast, the metabolic activity caused by exercise should age people, but doesn't. A few presentations that are happening at the American Physiological Society's annual conference in Virginia Beach (scientists love those off-season rates) suggest that the proposal is in need of a thorough reworking, at least based on the press releases the APS is putting out.
    The work was done in rodents, which have a pretty broad range of life spans. Standard lab mice live for about three years, whereas the naked mole rat is a longevity champion, lasting for nearly 30 years in addition to being eusocial and, well, naked. One study focused exclusively on two strains of mice, one active and the other sedentary. The mice were split into three groups of 100: one active group given a running wheel, one active group without it, and a sedentary group that was given a wheel. Regular dissections of members of each group revealed that energy use correlated with the presence of the running wheel, and none of the mice appeared to have unusual levels of antioxidants. The sedentary group outlived the active strain by about 10 percent of the typical life-span, but the two active groups lived for essentially identical time periods. So, it looks like energy use and longevity don't line up well, at least in these mice.
    Meanwhile, others are asking what makes naked mole rats so long-lived? It's not because they don't burn through calories like mice; an examination of markers of oxygen-induced damage shows that the naked mole rats have higher levels of damaged lipids, proteins and DNA than mice. It's still possible that they repair this damage more efficiently than mice, but it's clear that a lower level of oxygen metabolism alone isn't enough to explain this finding. The picture was blurred even further by another study

Ad Widget

Collapse
Working...
X