I'm not a doctor, but I can offer some general information based on common recovery guidelines after an appendix removal surgery. It's important to note that every individual's situation may vary, and it's always best to follow your doctor's advice for your specific case.

Appendix removal, also known as an appendectomy, is typically performed to treat appendicitis. After surgery, it's important to allow your body enough time to heal and recover. The timeframe for restrictions on lifting weights or engaging in strenuous activities may vary depending on the individual and the extent of the surgery.

Your doctor has advised you not to lift more than 3kg for about 3 months, and then gradually return to training after 6 months. This conservative approach is likely recommended to minimize the risk of complications or strain on your healing abdominal area. It's essential to follow your doctor's advice to avoid any potential complications or delays in your recovery.

While bench pressing primarily targets the chest muscles, it can also engage the abdominal muscles to some extent for stability and support. Even if the abdominal muscles are not directly tensing during the exercise, they may still be involved in providing stability and assisting with proper form.

Attempting to resume bench pressing or any other heavy lifting before your doctor's recommended timeframe could potentially strain or disrupt the healing process of the incisions or internal tissues. This could increase the risk of complications, such as incisional hernias or wound dehiscence.

It's best to prioritize your recovery and gradually reintroduce exercises as advised by your doctor. You can discuss alternative exercises or modified training routines with a physical therapist or an exercise specialist who can provide guidance on safe exercises that don't put excessive strain on your healing abdomen. They may be able to suggest exercises that allow you to continue working on specific muscle groups while minimizing the risk of complications.

Remember, your doctor's advice takes into consideration your specific situation, and it's crucial to follow their recommendations for a safe and successful recovery.