Pregnancy changes your body in ways that make most forms of exercise more difficult. Your center of gravity shifts, your joints loosen, your weight increases, and your energy levels fluctuate. The pool is one of the few places where all of these challenges become advantages. In the water, your belly feels weightless, your joints are supported, and you can move freely without worrying about balance or impact.
Pool exercise during pregnancy is not just safe for most women, it is actively recommended by obstetricians and midwives. It helps manage weight gain, reduces back pain, decreases swelling, improves sleep, and can even make labor and delivery easier. This guide covers everything you need to know, from safe exercises by trimester to temperature guidelines and important warning signs.
Why the Pool Is Perfect During Pregnancy
Buoyancy Relieves the Weight
As your baby grows, you carry an increasing amount of weight that stresses your back, hips, knees, and feet. In chest-deep water, buoyancy offloads roughly 80 percent of that weight. Many pregnant women describe stepping into the pool as an instant feeling of relief, like someone lifted a heavy backpack off their shoulders.
This weightlessness allows you to exercise comfortably well into your third trimester, when land-based workouts have become too uncomfortable for many women.
Reduced Swelling
Swollen feet and ankles are one of the most common pregnancy complaints, especially in the second and third trimesters. The hydrostatic pressure of the water gently compresses your tissues and pushes excess fluid back into your circulatory system. Many women notice that their swelling is significantly reduced for hours after a pool workout.
Low Impact Protects Loosened Joints
During pregnancy, your body produces a hormone called relaxin that loosens your ligaments and joints to prepare for delivery. While necessary, this loosening increases your risk of sprains and joint injuries during exercise. In the pool, the water supports your body and cushions your movements, dramatically reducing the risk of joint injuries. For more on how water-based exercise protects joints while building strength, see our aquatic training guide.
Temperature Regulation
Your body generates more heat during pregnancy, and overheating can be dangerous for your baby. Water conducts heat away from your body 25 times faster than air, making the pool a naturally temperature-regulated exercise environment. You stay cooler in the water than you would doing the same intensity of exercise on land.
Mental Health Benefits
Pregnancy can bring anxiety, mood swings, and stress. Exercise in water has been shown to reduce stress hormones, improve mood, and promote better sleep. The sensory experience of being in the water itself has a calming effect that many pregnant women find especially valuable. Our article on the hidden benefits of water sports for mental health explores this connection further.
Before You Start: Safety Guidelines
- Get clearance from your OB or midwife. Most healthy pregnancies have no restrictions on pool exercise, but certain conditions (placenta previa, risk of preterm labor, cervical insufficiency, severe anemia, or preeclampsia) may require you to limit or avoid exercise. Always check first.
- Water temperature matters. The ideal pool temperature for prenatal exercise is 78 to 84 degrees Fahrenheit. Avoid hot tubs, hot springs, and therapy pools above 92 degrees, especially in the first trimester. Overheating during early pregnancy has been associated with developmental risks.
- Stay hydrated. You sweat in the pool even though you do not feel it. Drink water before, during, and after your workout.
- Do not hold your breath. Some exercises involve underwater exertion. Always breathe normally. Holding your breath increases intra-abdominal pressure and can restrict blood flow to your baby.
- Listen to your body. Pregnancy is not the time to push through discomfort. If something hurts, stop.
Safe Exercises by Trimester
First Trimester (Weeks 1 to 13)
If you were active before pregnancy, you can generally continue your normal pool routine during the first trimester with minor modifications. If you are starting pool exercise for the first time, this is a great time to begin because your body is still relatively unchanged.
Focus on: Building a routine, cardiovascular fitness, general strength.
Be aware of: Nausea and fatigue may affect your energy. Adjust intensity based on how you feel each day.
Second Trimester (Weeks 14 to 27)
Many women feel their best during the second trimester. Energy returns, nausea subsides, and your belly is growing but not yet large enough to significantly limit movement. This is often the most productive trimester for pool exercise.
Focus on: Leg and hip strengthening (preparing for labor), core stability, maintaining cardiovascular fitness.
Be aware of: Your center of gravity is shifting. Balance exercises in the pool are more valuable than ever. Avoid lying flat on your back for extended periods after week 20, as the weight of the uterus can compress a major blood vessel.
Third Trimester (Weeks 28 to 40)
The pool becomes your best friend in the third trimester. As your belly grows and land-based exercise becomes increasingly uncomfortable, the water continues to support you. Many women who have stopped all other forms of exercise continue to work out in the pool until the day they deliver.
Focus on: Maintaining mobility, pelvic floor exercises, gentle cardio, stretching, relaxation.
Be aware of: Your range of motion may be limited by your belly. Modify exercises as needed. Reduce intensity and focus on feeling good rather than performance.
10 Prenatal Pool Exercises
1. Water Walking
Walk forward and backward across the pool in chest-deep water with a natural stride. Swing your arms and keep your posture as tall as possible. Aim for 10 to 15 minutes.
This is the foundation of every prenatal pool workout. It builds cardiovascular fitness, strengthens your legs, and practices the upright posture that often deteriorates during pregnancy. If you are new to exercising in the pool, our water aerobics for beginners guide has helpful tips for getting started.
2. Pool Squats
Stand in chest-deep water with your feet wider than shoulder-width apart. Hold the pool wall or a pool noodle for balance. Slowly lower yourself into a squat, keeping your knees over your toes and your back straight. Go as deep as is comfortable, hold for 3 seconds, then stand. Do 10 to 15 repetitions.
Squats are one of the best exercises for preparing your body for labor. They strengthen your legs, open your hips, and build endurance in the muscles you will use during pushing.
3. Leg Lifts
Stand holding the pool wall. Lift your right leg straight out in front of you, hold for 2 seconds, then lower it. Do 10 repetitions. Repeat to the side and to the back. Then switch to your left leg.
Leg lifts strengthen your hips, glutes, and thighs, all of which help support your growing belly and maintain your balance as your center of gravity shifts.
4. Gentle Flutter Kicks
Hold the pool wall with both hands and let your body float behind you. Kick your legs in a gentle flutter motion for 30 seconds to 1 minute. Keep the kicks small and controlled.
Flutter kicks build core and leg strength without putting any pressure on your back. In the third trimester, you can use a pool noodle under your hips for extra support.
5. Arm Sweeps
Stand in shoulder-deep water with your arms at your sides. Sweep both arms forward through the water until they meet in front of you, then sweep them back to your sides. Do 15 to 20 repetitions.
This exercise strengthens your chest, shoulders, and upper back, which helps counteract the forward-rounding posture that many women develop as their breasts and belly grow.
6. Side Steps
Stand in chest-deep water with your feet together. Step to the right with your right foot, then bring your left foot to meet it. Take 10 steps to the right, then 10 steps to the left. Add a resistance band around your ankles for extra challenge.
Side steps strengthen the hip abductors, which are important for pelvic stability during pregnancy and for maintaining a normal walking pattern as your body changes.
7. Water Cycling
Hang from the pool wall with your arms or use two pool noodles under your arms for support. Move your legs in a cycling motion for 1 to 2 minutes. This is a non-weight-bearing exercise that builds leg strength and cardiovascular fitness without any impact.
This is particularly helpful in the third trimester when you want to keep your legs moving but standing exercises are becoming tiring.
8. Pelvic Floor Exercises (Kegels in the Water)
Stand in waist-deep water with your feet hip-width apart. Contract your pelvic floor muscles (imagine stopping the flow of urine) and hold for 5 to 10 seconds. Release and rest for 5 seconds. Do 10 to 15 repetitions.
Strong pelvic floor muscles support your uterus, bladder, and bowels during pregnancy, help during labor, and speed recovery after delivery. The water provides a relaxing environment that makes it easier to focus on isolating these muscles.
9. Wall Push-Ups
Stand facing the pool wall at arm’s length. Place your hands on the pool edge and bend your elbows to lean toward the wall, then push yourself back. Do 10 to 15 repetitions.
Wall push-ups maintain upper body strength, which you will need once you are carrying and feeding your baby constantly. In the third trimester, stand a little further from the wall to accommodate your belly.
10. Floating Relaxation
At the end of your workout, float on your back using a pool noodle under your neck and another under your knees. Close your eyes and breathe deeply for 3 to 5 minutes.
In the second and third trimesters, if lying on your back is uncomfortable, float on your side or at a reclined angle supported by noodles. This cool-down reduces your heart rate, relaxes your muscles, and provides a few minutes of total body relief that is increasingly rare as your pregnancy progresses.
A Sample Prenatal Pool Workout
Duration: 30 to 40 minutes
Warm-Up (5 minutes)
- Water walking forward and backward
Cardio (10 minutes)
- Side steps: 3 minutes
- Water cycling: 3 minutes
- Water walking with high knees: 4 minutes
Strength (12 minutes)
- Pool squats: 3 minutes
- Leg lifts (all directions): 3 minutes
- Arm sweeps: 2 minutes
- Wall push-ups: 2 minutes
- Pelvic floor exercises: 2 minutes
Cool-Down (5 minutes)
- Gentle flutter kicks: 2 minutes
- Floating relaxation: 3 minutes
Adjust the duration and intensity based on your trimester and how you feel. The second trimester is typically when you can do the most. The third trimester may require shorter sessions with more rest between exercises.
How Often Should You Exercise?
The American College of Obstetricians and Gynecologists recommends at least 150 minutes of moderate-intensity exercise per week during pregnancy. That works out to about 30 minutes, 5 days per week, or 50 minutes, 3 days per week.
Pool exercise counts toward this total. Most women find that 3 to 4 pool sessions per week is a sustainable and effective frequency. On non-pool days, gentle walking or prenatal yoga can complement your water workouts.
A waterproof fitness tracker can help you monitor your heart rate during pool workouts to ensure you are staying in a moderate intensity range.
What to Avoid
While pool exercise is one of the safest forms of prenatal activity, there are a few things to skip:
- Hot tubs and very warm pools (above 92 degrees F), especially in the first trimester
- Diving or jumping into the pool. The impact can be jarring, and the risk of hitting your belly is not worth it.
- Holding your breath during exertion
- Lying flat on your back in the water after about 20 weeks if it causes dizziness or discomfort
- High-intensity interval training unless you were doing it regularly before pregnancy and your doctor approves
- Contact water sports like water volleyball in the later stages of pregnancy when accidental contact could be a concern
When to Stop Exercising and Call Your Doctor
Stop your workout and contact your healthcare provider if you experience any of these symptoms:
- Vaginal bleeding or fluid leaking
- Dizziness, lightheadedness, or feeling faint
- Shortness of breath before you start exercising
- Chest pain
- Headache that does not go away
- Calf pain or swelling
- Regular, painful contractions
- Your baby stops moving during exercise
These symptoms do not necessarily mean something is wrong, but they warrant a medical evaluation before you continue exercising.
Temperature Guidelines
Pool temperature is one of the most important safety considerations for prenatal exercise.
- 78 to 84 degrees F: Ideal range for moderate-intensity prenatal exercise
- 84 to 88 degrees F: Acceptable for gentle, low-intensity exercise (walking, stretching)
- Above 92 degrees F: Avoid, especially in the first trimester. This includes hot tubs and thermal pools.
- Below 78 degrees F: May be too cold for comfort. If you get chilled, your muscles will tense up and the exercise will not be as beneficial.
Most public lap pools are kept between 78 and 82 degrees, which is right in the ideal range. If your pool has a warm therapy pool and a cooler lap pool, use the lap pool for cardiovascular exercise and the therapy pool only for brief, gentle stretching.
If you are also dealing with back pain during pregnancy, many of these exercises overlap with those in our pool exercises for back pain guide. And once your baby arrives and you are cleared for exercise again, our pool exercises for weight loss guide can help with postpartum fitness. For older women who may be navigating pregnancy later in life, our pool exercises for seniors guide covers additional gentle options.
Frequently Asked Questions
Is it safe to swim during pregnancy?
Yes. Swimming and pool exercise are considered some of the safest forms of physical activity during pregnancy. The water supports your body, reduces impact on your joints, and helps regulate your body temperature. Most obstetricians actively recommend pool exercise for healthy pregnancies. Just get clearance from your provider, especially if you have any pregnancy complications.
Can I start pool exercise if I was not active before pregnancy?
Absolutely. The pool is actually one of the best places to start exercising during pregnancy because it is so gentle on your body. Begin with simple water walking and gradually add exercises as your fitness improves. Start with 15 to 20 minutes and work up to 30 minutes or more. The key is to begin at a comfortable intensity and increase gradually.
Will pool exercise help with labor and delivery?
Pool exercise during pregnancy has been associated with several labor benefits in research studies. Regular aquatic exercise can improve your cardiovascular endurance (helpful for a long labor), strengthen the muscles used during pushing, maintain flexibility in your hips and pelvis, and improve your overall fitness, all of which can contribute to a smoother delivery and faster recovery. Some studies have also found that women who exercised regularly during pregnancy had shorter labors on average.
Can chlorine in the pool harm my baby?
Standard pool chlorine levels are considered safe during pregnancy. The chlorine is there to kill harmful bacteria, which actually makes the pool a safer environment. There is no strong evidence that swimming in chlorinated pools poses any risk to your baby. If you are concerned, outdoor pools with good ventilation are an option, as is swimming in saltwater pools, which use lower levels of chlorine.