Thank you for your question. Of course you must follow the instructions of the plastic surgeon who performed your surgery.
In my practice I asked patients to wait on average 3 weeks after combination breast augmentation and breast lift before they start vigorous exercise. It is important that the skin incisions on the breast are dry, pink and appropriately healed for 3 weeks before stressing the incision. It is also important to wear a support bra during any exercise activity.