@the_modernsapien: If your arms are still jiggling after months of training, your age isn't the reason. But let me be specific, because age does matter here. After menopause you lose muscle faster than you did at 35. Estrogen drops and holding onto muscle gets harder. That's real, and it's why this feels different than it used to. That explains why it got harder. It doesn't explain why you're stuck. You're stuck because of the response. Most women turn 50, get cautious, drop to three pound dumbbells and hundreds of reps. That's the exact moment your body needed you to load it harder, not lighter. Age changed what the work requires. It didn't change whether it works. Progressive overload isn't a young woman's tool. It's the only one that works against muscle loss.