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Is physical fitness important to your brain fitness?

February 26, 2007 by Caroline Latham

Here is ques­tion 18 of 25 from Brain Fit­ness 101: Answers to Your Top 25 Ques­tions.Trail Runner

Ques­tion:
Is phys­i­cal fit­ness impor­tant to your brain fitness?

Key Points:

  • Exer­cise improves learn­ing through increased blood sup­ply and growth hormones.
  • Exer­cise is an anti-depres­sant by reduc­ing stress and pro­mot­ing neurogenesis.
  • Exer­cise pro­tects the brain from dam­age and dis­ease, as well as speed­ing the recovery.
  • Exer­cise ben­e­fits you the most when you start young.

Answer:

Yes. Accord­ing to Fred Gage, PhD, of the Salk Insti­tute for Bio­log­i­cal Stud­ies, “We now know that exer­cise helps gen­er­ate new brain cells, even in the aging brain.”

Accord­ing to the research of Richard Smeyne, PhD at Saint Jude Chil­drens Research Hos­pi­tal in Mem­phis, with just two months of exer­cise there are more brain cells and that high­er lev­els of exer­cise were sig­nif­i­cant­ly more ben­e­fi­cial than low­er amounts, although any exer­cise was bet­ter than none. He also found that start­ing an exer­cise pro­gram ear­ly in life to be an effec­tive way to low­er the risk of devel­op­ing Parkin­son’s dis­ease lat­er in life.

As lit­tle as three hours a week of brisk walk­ing has been shown to halt, and even reverse, the brain shrink­age that starts in a per­son­’s 40s, espe­cial­ly in the regions respon­si­ble for mem­o­ry and high­er cog­ni­tion. The exer­cise increased the brain’s vol­ume of gray mat­ter (actu­al neu­rons) and white mat­ter (con­nec­tions between neurons).

Increased blood flow to the brain trig­gers bio­chem­i­cal changes that spur the pro­duc­tion of new brain neu­rons. Brain exer­cise then pro­tects these fledg­ling neu­rons by bathing them in nerve growth fac­tor and form­ing func­tion­al con­nec­tions with neigh­bor­ing neurons.

Dr. Kramer said “After only three months, the peo­ple who exer­cised had the brain vol­umes of peo­ple three years younger. This is the first time any­one has shown that exer­cise increas­es brain vol­ume in the elder­ly. It sug­gests that aer­o­bic exer­cise can stave off neur­al decline, and even roll back some nor­mal age-relat­ed dete­ri­o­ra­tion of brain struc­ture.

Fur­ther Reading

  • How to Keep Your Aging Brain Fit: Aer­o­bics by Sharon Beg­ley, Wall Street Jour­nal, Nov. 16, 2006.
  • Buff and Brainy: Exer­cis­ing the Body can Ben­e­fit the Mind by Chris­ten Brown­lee, Sci­ence News, Feb. 25, 2006;169(8):122.
  • Col­combe SJ, Erick­son KI, Raz N, Webb AG, Cohen NJ, McAuley E, Kramer AF. Aer­o­bic fit­ness reduces brain tis­sue loss in aging humans. J Geron­tol A Biol Sci Med Sci. 2003;58:176–80.
  • Cot­man CW, Berch­told NC. Exer­cise: a behav­ioral inter­ven­tion to enhance brain health and plas­tic­i­ty. Trends Neu­rosci. 2002;25:295–301.
  • Ding Q, Vayn­man S, Sou­da P, White­legge JP, Gomez-Pinil­la F. Exer­cise affects ener­gy metab­o­lism and neur­al plas­tic­i­ty-relat­ed pro­teins in the hip­pocam­pus as revealed by pro­teom­ic analy­sis. Eur J Neu­rosci. 2006;24:1265–76.
  • Heyn P, Abreu BC, Otten­bach­er KJ. The effects of exer­cise train­ing on elder­ly per­sons with cog­ni­tive impair­ment and demen­tia: a meta-analy­sis. Arch Phys Med Reha­bil. 2004;85:1694–704.
  • van Praag H, Shu­bert T, Zhao C, Gage FH. Exer­cise enhances learn­ing and hip­pocam­pal neu­ro­ge­n­e­sis in aged mice. J Neu­rosci. 2005;25:8680–5.
  • Vayn­man S, Gomez-Pinil­la F. Revenge of the “sit”: how lifestyle impacts neu­ronal and cog­ni­tive health through mol­e­c­u­lar sys­tems that inter­face ener­gy metab­o­lism with neu­ronal plas­tic­i­ty. J Neu­rosci Res. 2006;84:699–715.

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Filed Under: Brain/ Mental Health Tagged With: attention, Brain-Fitness, Brain-health, Cognitive Neuroscience, computer-game, concept-map, conference, Dawkins, depression, expert-knowledge--neurons, Gratitude, Guy-Potter, Health & Wellness, Mind-Fitness, Mind/Body, Neurogenesis, pain, Physical-Fitness, Robert-Sapolsky, scientific-american, scientific-mindset, Sharon-Begley, students

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