AT SGSC we often emphasise the importance of maintaining muscle mass for reasons of health, independent living in age etc, etc. But there are also benefits on a more immediate level from that.
Can you do this?
What's more this shows you that the conditioning that SGSC encourages for the best quality of life in age can be achieved without going in the gym and pumping iron. All of this has been achieved with body-weight exercises.
So even if you are gym-averse, there is no excuse other than you own decision-making for letting yourself fall into the frailty that is one of the greatest risks to health of living longer.