Metabolism really slows down. This is a normal process, but you can also influence it. My wife is 44 years old and she is in good shape through daily simple exercises. It can be Pilates, yoga, dancing like rumba. There are additional features - weights ribbons and a special belt - https://womenmotorist.com/best-waist-trimmers/ She trains in the morning for 35 minutes a day. Yes, for this you need to observe the daily routine and this also gives its plus. If you are constantly in rhythm, then the metabolism will be at a good level even at 50.