Are all muscles equally affected by aging-induced sarcopenia?

Hello everyone, the conversation today is about a paper that has recently been published in the Journal of Applied Physiology. It is a review that identifies how various muscles are affected by sarcopenia of aging. Muscles represent ~40% of body weight in men and ~30% in women. We all accept the idea that muscle mass is lost with the aging process. We also acknowledge that skeletal muscles play important roles in glycemic control, mobility, bone strength, brain health, and longevity. However, we normally do not distinguish between different types of muscles located in the upper versus lower body or postural versus non-postural muscles. In this paper, the authors identify the muscles that are mostly affected by aging. It compiles computed tomography, magnetic resonance imaging, and ultrasound data to compare muscle mass between young and old individuals (982 25 year-olds vs. 1,003 75 year-olds). So there is a 50 year gap between young and old individuals. This graph shows that all muscles shrink with aging, which is expected; however, paraspinals, psoas, and quadriceps are the ones that display the highest rates of mass loss with aging. It’s important to highlight that paraspinals and psoas are multiarticular muscles that play a major role in spine stabilization and function. Interestingly, the rectus femoris has also been identified as the one displaying the highest rate of mass loss with aging (-33%) within the quadriceps. The rectus femoris is also biarticular, and besides leg extension, it also participates in hip flexion. These muscles are very important for core strength and maintenance of mobility as we age. From a practical perspective, it is important to design resistance training programs that emphasize strengthening of these muscles. The main goal is to minimize the loss of muscle mass and keep the elderly active, healthy, and independent. Keep that in mind and I’ll see you in the next.

[@thelonelyvloggee]

This was super intresting id done my own research on this when i was younger so it was interesting to see this study your videos are very cool :)

[@Z4mbrer0]

Hi thanks your video has helped my understanding and will be really useful to my report! Also just wanted to ask how Joanna was? I used to watch UA-cam videos and just put two and two together and remembered you from her vids!

[@marinayoko8604]

Are there any differences between elderly people that was athletes when young adults? Their muscle shrink less? Ótimo video aliás, queria que fosse mais longo! bjs do Brasil

[@rolandoceddia9061]

Thanks Marina, being a past athlete does not protect from muscle loss during aging. Inactivity equally strikes previous athletes or non-athletes. However, it appears that those who have been involved with exercise in the past can more easily regain muscle strength and possibly even lean mass once exercise is picked up again at a later age. Vou alongar um pouco os proximos videos. Best, R

[@marinayoko8604]

@@rolandoceddia9061 thank you for your explanation! Keep the good work