interesting question, there a few ways you could look at this. the first would be a training programming issue. you have alluded to that, and i think you know training that way is not optimal so enough said. the second thing i would wonder about is diet. for example, if you’re cutting on 1000 calories, of course your muscles will be more fatigued, but that is an extreme example. you didn’t really provide a whole lot of information, so i’m trying to give several guesses. the next thing i would wonder about is age. as we age, our bodies don’t work the same anymore. someone can’t push as hard as they used to when they’re 30 compared to being 55. however, i’ve heard
@JJB1 talk a lot about how HGH has helped him turn back the hands of time and train more, so that could be an interesting approach. i would say it’s more than likely one of these issues considering program, diet, and age. if you have anymore questions, i would be more than happy to answer! best of luck & safe health!
i’m not a doctor. this is not medical advice or advice anyone should act on!