It is good for you to have the motivation to exercise after giving birth. For particulars, you can consult with a doctor. As a general rule, light physical exercise can be started 6 weeks after cesarean section, while the heavier exercises like tennis can be started after three months. During exercise, wear a bra that supports your breasts properly. If you are breastfeeding, it’s better if you exercise after breastfeeding in order to avoid a feeling of full and weight in the breast.
When you have stopped your sports activities for a while, start back gradually, starting from low impact and regular exercise 3-4 times per week to strengthen and stabilize the hip joints. The possible low impact sport is race walking, swimming, aquarobic, yoga, Pilates, low impact aerobics, and cycling. Stay warm up and cool down before and after exercise. Avoid excessive fatigue and dehydration. Stop when there is emerging sense of dizziness or pain.