I am getting an explant in 2 weeks. Should I stop doing weights for upper body now? Or it doesn’t matter?

You are fine to continue your regular exercise routine up to the day of your surgery. Lifting weights prior to surgery will not have any negative impact. Good luck with your procedure!

Cease any strenuous activity for a period of time after your procedure. In order to get the best breast explant results, you need to allow your body to heal. Exercise and other high-intensity activities can cause damage to the surgical site and increase swelling.

Dear susibarr,
every plastic surgeon has his own preoperative protocol which he recommends to his patients. I would suggest you to discuss this with your plastic surgeon.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

No, keep on exercising until the day of surgery. You will be restricted for a while after surgery to allow yourself to hesl.

It should not matter if you continue to do weights between now and your surgery. I don't recommend any new lifting programs where you might injury the muscle, but keeping healthy with your current routine should be fine.