You go to bed around the same time. You haven't completely changed how you eat. Your job is demanding—but it has been demanding for years. You're still doing the things you've always done. And yet somehow, they seem to cost more. The afternoon slump feels deeper. One bad night takes longer to recover from. A busy weekend follows you into Monday. Missing lunch doesn't feel as easy to shrug off. It can leave you wondering: What changed if nothing changed? This is where many exp

Maybe your routine hasn't changed very much, but your body has started responding differently. A late night seems to cost more the next day. Sleep feels lighter. Your usual workout takes longer to recover from. Your shape changes even though the number on the scale hasn't moved much. Hunger arrives at unfamiliar times. Stress seems to linger. And eventually a question appears: Why does my body feel so different after 40? The reassuring part is that noticing a difference does