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Hypertrophic Response of Aged Women to Resistance Training is Positively Impacted by Participation in a Long‐Term Stretching Intervention

The loss of muscle mass and strength that occurs with advanced age, or sarcopenia, is a growing public health concern that impacts a growing portion of the population. The portion of the population over the age of 65 accounts for almost 20% of the total population. Muscle mass and strength are highly correlated with quality of life for aged adults. Mass is also a strong predictors of all‐cause mortality. Thus, resistance training (RT) is commonly recommended for aged adults. However, studies that have had young and aged adults perform the same percentage based RT program found that young adults gain significantly more strength and muscle mass than the aged adults. There are many levels of the hypertrophic response to RT that may be impaired resulting in the observed attenuation. However, similar attenuations have been observed following acute exercise making it possible that the impairment lies in the mechanotransduction cascade. One possible mechanism for decreased mechanotransduction is decreased mechanosensation caused by increased extracellular matrix stiffening. Stretching has been shown to decrease muscle stiffness in young men which indicates that this may be a viable means to modulate stiffness and improve the response to RT in aged adults.