Don't get me wrong, I'm not against the free flow of information and the ability to discuss varying viewpoints. I'm just convinced that the benefits to challenging and progressive training are undersold, and that some kind of "as long as you get up off the couch once in a while" thinking seems prevalent. I'm hoping we as a community can do better than that message. I'm not the best ambassador for it, but I try to reiterate it when possible.
In 2010 I was in school and recovering from my second knee surgery at 41 years old, when I went and watched a powerlifitng competition held right at the school gym. I said "I want to do that." And I also wanted to stop limping when I walked, especially up and down stairs. Sure enough, a year later I broke in with a 1000+ total, had eliminated my limping, and was pretty excited. I trained my first six months just following a mobility program from Eric Cressey that had very little actual "big three" in it. Not everyone needs to do a powerlifting program. If I trained a fighter I'd probably have more explosive work emphasized. But old people can benefit greatly from heavy resistance work ("heavy" being a relative term). The ones I've worked with (I worked at a gym for a couple years while I went to school) improved their posture, balance, mobility, flexibility, and of course, strength. A few of the people I worked with had pretty dramatic improvements, including some pretty formerly feeble older women. I'm going to guess they had additional benefits to bone density, reflexes, mental ability, etc. but I could only see the tangible results. Better movement, mostly.
Anyway my point is that people set the concept of age and infirmity and "athletic peak" aside and just try to push their limits, consistently, for a reasonable period of time. Say three months, then reassess. I've been training after a two-year layoff for less than nine months, but with determination. I've recently realized that, even though I'm not as heavy as I've previously been, I'm stronger now than ever before in my life. Stronger than I was in 11th grade when I was 142 pounds and benched 240 and power cleaned 210 in the football clean/bench competition, setting the pound-for-pound school record. And it's awesome for me (not especially impressive in the grand scheme of things, I'm not in the top 20 strongest around here) but I'm not done improving yet. And I'm now 48.
You gotta understand that seeing a guy crying about his old, tired body at 30 makes me want to shake him by the shoulders. He should get to work improving his life, right now. Some hard work will pay off, short term and long term. Anything less is a shame.