Aerobic exercise training improves whole muscle and single myofiber size and function in older women

Matthew P. Harber, Adam R. Konopka, Matthew D. Douglass, Kiril Minchev, Leonard A. Kaminsky,
Todd A. Trappe, and Scott Trappe
Human Performance Laboratory, Ball State University, Muncie Indiana

The benefits of aerobic exercise on cardiovascular and metabolic
health in older adults have been well established (31).
Our findings extend these benefits and provide evidence, for
the first time, that progressive aerobic exercise training can
elicit robust improvements in muscle size and performance in
healthy older women. Although adaptations at the whole muscle
level (size and function) were similar to resistance traininginduced
adaptations in this subject population, it appears that
aerobic training results in qualitative changes in muscle composition,
namely, increases in water content and a reduction in
myofibrillar protein concentration that are not typically observed
with resistance training. Additionally, aerobic training
appears to remodel the contractile characteristics at the cellular
level (i.e., increased contraction velocity and reduced normalized
force) in conjunction with myofiber hypertrophy, mostly
of the slow myofibers, to achieve an enhanced power production.
These data provide novel insights into the regulation of
muscle plasticity by physical activity in older adults. Further,
these findings identify aerobic exercise training as a viable
option for improving muscle mass and function in older adults.

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About teammadeonline

Hello there! My name is Melissa McAllister. I am a proud 37 year old mother of a smart and witty 16 year old son and a bright and sassy 15 year old daughter. My husband is the reason I eat, drink, and sleep health and fitness. He has 2 speeds, GO and GO Faster. We have been together for over 22 years and married for 16 (yes, he had me at “hello!”). Don't get me wrong though...I was a Dorito and Coca Cola eating Hoover when I was in school! Fitness has been an essential part of my life for over 14 years. I have the 3 best jobs in the world—being a stay-at-home Mom, business owner, and group exercise instructor for several large fitness chains. I have been teaching everything from yoga to kickboxing for over 12 years. I have also had the great opportunity to train, inspire, and motivate other instructors for the past 9 years. You might even see me in a few fitness videos out there! ;) Reaching out to others who are struggling to be healthy and happy is my passion. I couldn’t tell you next Fall’s latest fashion must have or what flowers to plant this season, but I can help you achieve your health and fitness goals. With your determination and my motivation, we can find and keep the best YOU! Everyone deserves to be excited to get dressed in the morning and proud to walk into any room. My Motto: I will inspire by holding myself and those around me accountable!

Posted on September 18, 2012, in Healthy Habits and tagged . Bookmark the permalink. Leave a comment.

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