You're likely not losing much by skipping machines entirely. A recent analysis comparing free weights to machines found no real gaps when it came to building strength, adding muscle size, or improving leaps. The data shows gains tend to match whatever tools you pick, so the decision comes down to what feels right for your own aims and tastes.
Pushing sets all the way to the limit still helps, though research shows most people aren't perfect at judging their remaining reps. Checking in every so often sharpens that sense, especially away from lab conditions. I go all out on certain moves that feel secure, but only hit true failure on others every couple of weeks to reset my sense of effort. A few lifts just seem too risky without backup, so I skip regular failure on those. I train alongside others most sessions, yet everyone wants quick workouts and I hate asking for constant help.
I'm simply some random posting online. Still, several researchers with advanced degrees in the field back up what I'm saying. One has focused on exercise and sports science, another on muscle physiology and hormones, and a third on human movement. If it turns into a contest over credentials, plenty of specialists in this exact area disagree with the opposing view. One expert in particular has spent time collecting input from others to counter those claims. Another full-time academic at a major medical research center has also weighed in after looking at training responses across wide age ranges in both sexes.
The idea that studies on this topic skip women around menopause doesn't hold up against the available work. Plenty of meta-analyses, big controlled trials, and long-term observations already address it directly and point the other way. I've pointed to several of those earlier, along with expert breakdowns, yet the only reply was a question about my background. If citing the research requires special degrees, does the same rule apply both ways?