Full disclosure: I'm 50. I compete in Olympic weightlifting, so do a lot of barbell work, but I also use kettlebells, clubs, and bodyweight modalities.
For combating age-related decline of LBM and sarcopenia, are you....
Trying to combat scarcopenia? --> Hypertrophy programming
Trying to combat power declines? --> Ballistic programming
Trying to combat osteoporosis / bone density loss --> Strength programming
Trying to combat declines in balance, mobility, and proprioception? --> Movement programming
There are more issues than just sarcopenia to worry about and more than one modality or movement to use.
I do all of the above in periodized fashion.