|The great Howard Cohen, still competing and setting records in his mid-80s. (Picture and article cited below.||)|
In older adults the loss of muscle accelerates after the age of 60. There are lot factors involved: denervation, hormone status and protein intake among them. The risk of crippling and life threatening falls increase with age, but this risk can be attenuated with proper exercise and nutrition. Unfortunately, the twin losses of reflexes and fast twitch muscle fibers, both required for rapid balance correction, are difficult to regenerate once lost.
A recent article makes the case for including light explosive training for older adults. In older adults muscle growth is a secondary contributor it is the neurological effects of training which are most critical. The adage train fast to be fast applies here. Of course, individual orthopedic issues have to be taken into consideration, but where possible, moving lighter weights more quickly may be more functional than slow reps.
Baum, J. I., Kim, I.-Y., & Wolfe, R. R. (2016). Protein consumption and the elderly: what is the optimal level of intake? Nutrients, 8(6). https://doi.org/10.3390/nu8060359
Deschenes, M. R. (2004). Effects of aging on muscle fibre type and size. Sports Medicine (Auckland, N.Z.), 34(12), 809–824. https://doi.org/10.2165/00007256-200434120-00002
Orssatto, L. B. da R., Cadore, E. L., Andersen, L. L., & Diefenthaeler, F. (2019). Why fast velocity resistance training should be prioritized for elderly people. Strength & Conditioning Journal, 41(1), 105. https://doi.org/10.1519/SSC.0000000000000407
Still going strong. (2017, May 2). Retrieved February 7, 2019, from https://news.georgiasouthern.edu/magazine/2017/05/02/still-going-strong/