Absolutely. Though this presupposes that the person “can” lift. Aging can bring a myriad of issue that can prevent weight-training. I have bilateral 1st CMC severe osteoarthritis (thanks mom). (Arthritis of the base of the thumb.) This prevents my use of some of the machines at the gym. Still, I make do.
But for most, sure. Start low, start slow, but w/in a few weeks get to that point where you “fail.” Where, someone could walk up to you and wave a $100 bill and say: “do one more, and it’s yours.” If you get the bill—you are not getting the training response you need. For the first 8-12 weeks, even getting close, is enough, but eventually, it’s that singular failure that tells your body: “We need to be able to do this task,” and “voila,” the body builds itself.
Even the “grunters,” at the gym often fail to do a repetition to exhaustion—with good form. Many use inertia. Impressive to an onlooker, but inertia does not tell the body to build stronger muscles. I’m aged 74. Over the past several years, 5 episodes of flat-on-my-back in bed devastated my musculature. Surgery fixed that, which led to 54lb fat loss which returned me to the gym happy to have a “second chance.” I’m thrilled today to have trouble putting my shirt on due to DOMS (delayed onset muscle soreness). (That muscle soreness you get the day or two after lifting).
From what I’ve researched the ideal for building muscle is 4-meals/day (30 grams protein) at each. I figure the quantitative amount of leucine and supplement to get to 4 grams.
If a senior eats 20 grams protein, they won’t move to an anabolic state. If a senior eats 20 grams protein w/ one or two grams of leucine (total 3.5-4g) they will move to an anabolic state.
If a person aged 30 eats 20 grams of protein, they will move to an anabolic state. Leucine seems to act as a sort of messenger, so for those over 60, getting enough protein per meal to trigger the anabolic state seems important, though perhaps, not crucial as I’ve read that time restricted fasting 8/24 w/ adequate protein will still be enough, but perhaps, not optimal.
Note: There are lots of studies that look at leucine supplementation in elderly without resistance training, and indeed many call the leucine threshold a “myth,” and so it may be, but we’re talking about the over-60 crowd, so if you research it, use proper parameters.