In the postpartum recovery period, there are indeed some specific fitness exercises that can help new mothers recover their physical strength, strengthen their core strength and improve their mood. However, please communicate with the doctor first and start any exercise under their guidance. Everyone's situation is different, so the recovery time will be different.

Here are some fitness exercises suitable for postpartum:

1. Walking: This is the simplest and safest activity, which can help you recover your strength. Let's take a walk nearby.

2. Yoga: Relaxation and restorative yoga can help postpartum mothers relax tense muscles, enhance core strength, and help reduce stress and anxiety.

3. Squat: Squat can exercise the muscles of thighs, buttocks and abdomen, which is very helpful for improving core strength after childbirth.

4. Swimming or water sports: The buoyancy of water can reduce joint pressure, and this whole body exercise can effectively burn calories.

5. Postpartum Pilates: This is a kind of exercise specially designed for postpartum mothers. It can help repair the abdominal and pelvic floor muscles that may be affected during childbirth.

6. Breastfeeding Yoga: This is a specially designed yoga, which helps to strengthen core strength and improve posture, and can be carried out while holding the baby.

Remember, consult your doctor before starting any new exercise program. Besides, you should also listen to your body. If you feel unwell, you should stop exercising at once.