Can I Exercise During IVF? Reproductive Doctors Explain Precautions by Stage

Opening: Real consultation scenario

In the outpatient clinic, a 33-year-old female patient with an AMH of 1.8 ng/mL entered an ovarian stimulation cycle due to tubal factors. She was accustomed to running 4 times a week, 5 kilometers each time. On the 6th day of stimulation, when her follicles reached 14mm in diameter, she asked, "Doctor, can I still continue running?" This is a highly representative question in IVF treatment — Can I exercise during IVF in China? The answer is not a simple "yes" or "no," but requires a comprehensive assessment based on the treatment stage, ovarian response, hormone levels, and individual risks.

Direct Answer: Yes, you can exercise, but it must be staged, typed, and intensity-adjusted

During IVF treatment, exercise is not forbidden, but it requires dynamic adjustment. Core principles: avoid abdominal compression, avoid the risk of ovarian torsion, avoid falls and impacts, and avoid excessive fatigue. Exercise requirements vary greatly at different stages. The table below summarizes the general recommendations, followed by detailed explanations for each stage.

Why are exercise requirements so different at different stages?

The fundamental reason lies in the dynamic changes in ovarian volume and hormonal environment. In a natural cycle, the ovary is about 4cm × 3cm × 2cm. Under the stimulation of ovulation-inducing drugs, multiple follicles in both ovaries develop simultaneously. By the mid-to-late stage, ovarian volume can increase to 3-5 times its original size, or even larger. Enlarged ovaries are prone to ovarian torsion during vigorous exercise or sudden position changes, a complication requiring emergency surgery. Additionally, after egg retrieval, there are puncture points on the ovarian surface, and vigorous exercise may increase the risk of bleeding or infection. During the embryo implantation period after transfer, uterine contractions and changes in abdominal pressure may affect embryo stability.

Furthermore, hormone levels (especially estradiol) can reach 10-20 times those of a natural cycle in the late stimulation phase. High estradiol levels affect vascular permeability and coagulation function, and vigorous exercise may increase the risk of Ovarian Hyperstimulation Syndrome (OHSS). Therefore, exercise recommendations must be adjusted in sync with physiological changes.

Doctor's Perspective: The relationship between exercise and IVF outcomes

From a reproductive medicine perspective, moderate exercise itself does not reduce IVF success rates, but inappropriate exercise can pose risks. Moderate exercise in the early stimulation phase can help improve pelvic blood circulation, alleviate anxiety, and regulate the endocrine axis. Conversely, prolonged bed rest after embryo transfer may negatively affect uterine blood flow and endometrial receptivity. A 2020 retrospective study involving 587 transfer cycles showed no significant difference in clinical pregnancy rates between the normal activity group and the bed rest group, but the bed rest group had higher anxiety scores. Therefore, doctors generally recommend "avoiding vigorous exercise, but complete immobilization is unnecessary."

In clinical decision-making, doctors provide individualized exercise recommendations based on factors including: number and size of follicles, estradiol levels, history of OHSS, ovarian position (e.g., whether the ovary is mobile), BMI, and the patient's usual exercise habits. For example, a patient with an athletic background can maintain moderate-intensity exercise in the early stimulation phase but requires close monitoring of ovarian size changes.

Detailed Exercise Recommendations for Each Stage (Including Medical Principles)

1. Pre-treatment evaluation stage (approximately 1-2 months)

During this stage, the ovaries are in a natural state with normal hormone levels. Patients can maintain their usual exercise habits, including running, strength training, yoga, and swimming. It is recommended to exercise 3-5 times per week for 30-45 minutes each session. Appropriate exercise helps improve insulin sensitivity, lower BMI, and alleviate pre-pregnancy anxiety, positively impacting subsequent ovarian response.

2. Early ovarian stimulation (medication days 1-7, follicle diameter <12mm)

Follicles begin to develop, and the ovaries enlarge slightly, but the overall risk is low. Exercise can continue, but it is advisable to reduce intensity to 60%-70% of usual. For example, switch running to brisk walking or jogging, and high-intensity interval training to low-intensity aerobics. For yoga, avoid deep twists and poses that compress the abdomen (e.g., Boat Pose, Wheel Pose). Swimming can continue, but the water temperature should not be too cold (recommended 26-30°C) to avoid cold-induced uterine contractions.

Exercises to stop: Contact sports like basketball and soccer; activities with a risk of falling like horse riding and skiing; abdominal-focused exercises like sit-ups and crunches.

3. Mid-to-late ovarian stimulation (follicles ≥12mm until egg retrieval)

This is the highest risk stage. Ovarian volume increases significantly, with multiple follicles exceeding 12mm in diameter, increasing ovarian weight and mobility. Exercise must be greatly reduced at this point. It is recommended to only do walking, at a pace that does not cause abdominal pulling sensation, for 20-30 minutes daily. Avoid any running, jumping, twisting, or abdominal straining movements. Swimming is not recommended, as turning and kicking in the pool may increase abdominal pressure.

4. After egg retrieval (postoperative days 1-14)

Egg retrieval involves vaginal follicle puncture, leaving multiple puncture points on the ovarian surface, while the ovaries are still enlarged. Rest is the priority on days 1-3 post-op. You can walk slowly indoors (5-10 minutes per session, 2-3 times daily) to promote blood circulation and prevent thrombosis. From day 4 onwards, if there is no abdominal pain, increased vaginal bleeding, or ascites symptoms, you can gradually increase walking time to 20 minutes. For 2 weeks post-retrieval, avoid any moderate or vigorous exercise, including running, jumping, swimming, yoga, and strength training.

Symptoms to watch for: Worsening bloating, decreased urine output, difficulty breathing, rapid weight gain — these could be signs of OHSS, and exercise can worsen the condition.

5. From embryo transfer to pregnancy test day (approximately 12-14 days)

After embryo transfer, absolute bed rest is unnecessary. Substantial evidence shows that bed rest does not improve implantation rates and may increase the risk of thrombosis and anxiety. Normal daily life is advised, simply avoiding vigorous exercise. Walking is the best choice, 20-30 minutes daily, at a pace that does not cause abdominal pulling or fatigue. You can perform daily household chores (washing dishes, folding clothes, etc.) but avoid lifting heavy objects (over 5kg), climbing high, or prolonged bending.

During this stage, swimming (due to water temperature changes and public pool hygiene), yoga (especially twists and inversions), running, and jumping rope are not recommended. Sexual activity should also be avoided, as uterine contractions from orgasm may adversely affect implantation.

6. After confirmed pregnancy

After a positive pregnancy test, the exercise plan should be adjusted based on gestational week and obstetric risk assessment. In the first trimester (before 12 weeks), options include walking, prenatal yoga (under professional guidance), and stationary cycling. In the second trimester, swimming (suitable water temperature) and low-intensity strength training can be added. Throughout pregnancy, avoid activities that compress the abdomen or pose a fall risk. Conditions like placenta previa, cervical insufficiency, or multiple pregnancies require further exercise restrictions, following the combined advice of your obstetrician and reproductive specialist.

Easily Overlooked Details

• The "abdominal sensation" during exercise is more important than the type of exercise. For the same walk, the vibration and pulling sensation on the abdomen differ with speed or uneven terrain. Stop immediately if you feel lower abdominal bloating, pulling, or pain at any time.
• From the late stimulation phase to after egg retrieval, the risk of sudden position changes (e.g., standing up quickly, turning, bending to pick something up) is no less than that of exercise. Slow down your daily movements too.
• Not all "relaxation poses" in yoga are safe. Poses like Child's Pose or Cat Pose, which seem gentle, can cause discomfort due to abdominal compression or spinal flexion when the ovaries are enlarged.
• Heart rate control during exercise is often overlooked. In the mid-to-late stimulation phase, it is recommended that heart rate does not exceed (220 - age) × 60%. For example, for a 35-year-old patient, no more than 111 beats per minute. The subjective feeling should be that you can "talk normally."
• Recovery status after exercise: If you feel fatigued, have abdominal pain, or abnormal bleeding the next day, it indicates the exercise volume was too high and needs further reduction.

Common Pitfalls

Timeline: How to Adjust Exercise Based on Treatment Milestones

For easy memory, the IVF process can be divided into "Green, Yellow, and Red" exercise zones:

• Green Zone (Pre-treatment evaluation, early stimulation): Exercise can be maintained, with intensity appropriately reduced.
• Yellow Zone (Mid-to-late stimulation, post-transfer to pregnancy test): Walking only; avoid all other exercises.
• Red Zone (1-7 days after egg retrieval): Rest primarily, supplemented by slow indoor walking.

Regarding weekly planning: Confirm your exercise plan with your doctor before starting the stimulation cycle. If you don't usually exercise, do not suddenly start high-intensity training during IVF. If you exercise regularly, adjust gradually according to the zones above.

Special Situations

• Patients with Polycystic Ovary Syndrome (PCOS)

PCOS patients often have higher BMI and insulin resistance. Exercise itself is beneficial for improving metabolism and ovarian response. However, in the mid-to-late stimulation phase, PCOS patients tend to have larger ovaries and more follicles, increasing the risk of OHSS and ovarian torsion. Therefore, exercise restrictions need to be stricter — from day 6 of stimulation onwards, focus mainly on walking and avoid all moderate-to-high intensity exercise.

• History of Ovarian Torsion

For these patients, it is recommended to only perform daily activities throughout the stimulation and post-retrieval phases, avoiding any movement that could cause rapid abdominal displacement. Doctors may add progesterone or GnRH antagonists in the mid-to-late stimulation phase to reduce ovarian mobility.

• High Risk for OHSS

If estradiol > 3000 pg/mL during stimulation, or total follicle count > 20, or there is a history of OHSS, strictly limit exercise from the mid-to-late stimulation phase. Only indoor walking is permitted. Increase fluid intake and consume a high-protein diet. After egg retrieval, monitor weight, abdominal circumference, and urine output. Exercise must wait until the OHSS risk is resolved (usually 1-2 weeks post-retrieval) before gradually resuming.

• Advanced Maternal Age (≥38 years)

Older patients have diminished ovarian reserve, usually fewer follicles during stimulation, and limited ovarian enlargement, so exercise risk is relatively lower. However, they must still follow the stage-based principles. Additionally, older patients have a higher prevalence of comorbidities like hypertension and diabetes, so exercise must also consider the management of these underlying conditions.

Practitioner's Observation: Common Cognitive Biases About Exercise in Clinical Practice

In clinical work, I observe that patients' perceptions of exercise often swing to extremes: one group is "overly cautious," staying in bed from the start of stimulation, even eating in bed; the other group is "persistent exercisers," believing exercise is a panacea and still running 5km daily even in the late stimulation phase. Both approaches carry risks.

In fact, reasonable exercise management is a component of IVF treatment, not a contraindication. A 36-year-old patient with a BMI of 27.3 kg/m² had her first stimulation cycle cancelled due to OHSS. Before her second cycle, I advised regular exercise (4 brisk walks + 2 yoga sessions per week) combined with dietary adjustments during the pre-treatment phase. After 3 months, she lost 5kg, and her BMI dropped to 24.1. During the second stimulation, she strictly followed the stage-based exercise recommendations, successfully retrieved 12 eggs, and achieved pregnancy after transfer. This case illustrates that the key to exercise lies in "timing" and "dosage".

Another common issue is patients sharing experiences with each other. However, ovarian responses, hormone levels, and risk factors vary from person to person. One person's medicine is another's poison. Do not blindly imitate a "fellow patient" who walked for 1 hour daily after transfer and succeeded. At the same stage, one person may be able to walk for 30 minutes, while another can only manage 10 minutes; the difference lies in individual baselines.