One woman I know noticed that during perimenopause, her sleep became really disrupted. She would wake up several times a night, sweating. It was so frustrating for her as it affected her energy during the day. She started using a fan at night and changing to lighter bedding, which helped a bit.
My neighbor had a tough time with weight gain during perimenopause. She had always been able to maintain her weight easily before, but suddenly she noticed the pounds creeping on. She tried different diets, but what really worked was a combination of healthy eating, like more fruits and vegetables, and regular strength training. It took time, but she managed to stabilize her weight.