I started gaining some flab on the onset of peri-menopause so I don't consider it BS. I considered myself an advanced exerciser at that time but was only doing cardio. It was amazing too, because the weight came on without any change to my eating or exercising habits. I was eating via the Weight Watchers method. It was when I started having other symptoms that I had some medical tests done and realized what was happening.
To answer your question, when I started making weight training a regular part of my exercise routine that really helped, both physically and psychologically. I've also cut out a lot of sugar from my diet, added more protein and nuts, and cut down on caffeine.
Another thing you could do is talk to your Mom and find out how peri menopause affected her. All the reading I've done suggests your body will probably follow suit (not always but most times).
I applaud you for doing the research and asking questions. Please don't be shut down by negative comments from narrow minded people. There are a few like that out there you know! When your time comes, you'll be glad you were proactive.