For those of you debating whether you
should start a strength training program or not, consider the following key
facts that I discovered about muscle loss with age while writing a college
paper.
Studies have shown that a decline in muscle
mass can be seen in individuals as young as 30, with a rapid decline beginning
at 50. Research also indicates that sarcopenia (the name
given to the substantial loss of muscle mass with age) exists in over 40% of those 80
years and older (Baumgartner et al., 1998; Janssen, Heymsfield, Wang, &
Ross, 2000).
The specific and primary cause of
sarcopenia is not entirely understood, however a handful of biological reasons
play a large part in the notable decline in muscle mass with age. An
individual’s initial body size, as well as hormone imbalance, in middle aged
and older adults are important factors (Gallagher et al., 1997). Women
typically have less muscle mass to begin with, and their diminished production
of estrogen during menopause is significant, however; men may lose more muscle
mass with age due to the decline of testosterone which starts in their 20s
(Brown, 2008). Other factors that can lead to sarcopenia include decreased
muscle metabolism and nerve cell loss with age which leads to less nutrition
being delivered to the muscles (CSPI, 2007).
So, why does all this information
matter to you? Because, no matter how old you are, it is never too soon, or too
late, to make a difference in slowing down the natural decline of muscle.
Muscle strength allows humans to
complete essential activities of daily living, such as buying food and completing tasks
around their homes (CSPI, 2007). Having lower skeletal muscle mass has been
associated with a large decrease in function and can even lead to disability
(Chien et al., 2010; Zoico et al., 2004). Disability and the link to sarcopenia
can also lead to a premature loss of independence and an increased risk of
falling (Forrest et al., 2007).
The sooner you can begin a strength
training program, the better head start you will have on muscle loss. Although
it is easier to gain muscle mass and strength in younger years, research has
shown that older adults can still make significant gains in strength through
exercise (Carmeli et al., 2000). The most effective manner in which to increase
muscle strength quickly is to perform resistance exercises that target the
large muscles. Resistance training in both women and men has been shown to
increase strength by 40% after only two months of activity. In addition, a
healthy diet, especially consuming adequate amounts of protein, is another huge
factor that can assist in the fight against late life muscle decline (CSPI,
2007).
References
Baumgartner, R., Koehler, K.,
Gallagher, D., Romero, L., Heymsfield, S., Ross, R., … & Lindeman, R.
(1998). Epidemiology of sarcopenia among the elderly in New Mexico. American Journal of Epidemiology, 147,
755-763.
Brown, M. (2008). Skeletal muscle
and bone: effect of sex steroids and aging. Advances
in Physiology Education, 32, 120-126. doi: 10.1152/advan.90111.2008
Carmeli, E., Reznick, A.Z.,
Coleman, R., & Carmeli, V. (2000). Muscle strength and mass of lower
extremeties in relation to functional abilities in elderly adults. Gerontology, 46, 249-257.
Center for Science in the Public
Interest. (2007). Saving Muscle. Nutrition
Action Health Letter, 34(3), 3-6.
Chien, M. Y., Kuo, H. K, & Wu,
Y. T. (2010). Sarcopenia, cardiopulmonary fitness, and physical disability in
community-dwelling elderly people. Physical
Therapy, 90, 1277-1287. doi: 10.2522/ptj.20090322
Forrest, K., Zmuda, J., &
Cauley, J. (2007). Pattern and correlates of muscle strength loss in older
women. Gerontology, 53, 140-147. doi: 10.1159/000097979
Gallagher, D., Visser, M., De
Meersman, R., Sepulveda, D., Baumgartner, R., Pierson, R., … & Heymsfield,
S. (1997). Appendicular skeletal muscle mass: effects of age, gender, and
ethnicity. American Physiological Society,
83, 229-239.
Janssen, I., Heymsfield, S., Wang,
Z., & Ross, R. (2000). Skeletal muscle mass and distribution in 468 men and
women aged 18-88 yr. American
Physiological Society, 89, 81-88.
Zoico, E., Di Francesco, V.,
Guralnik, J., Mazzali, G., Bortolani, A., Guariento, S., … & Zamboni, M.
(2004). Physical disability and muscular strength in relation to obesity and
different body composition indexes in a sample of healthy elderly women. International Journal of Obesity, 28,
234-241. doi:
10.1038/sj.ijo.0802552