# Day 236: The pool

> Thirty-three weeks and five days. Walking and swimming are generally safe in pregnancy, and the water takes the weight. Today you book thirty minutes in the pool.

- Series: Your eighth month of pregnancy, day by day (https://chorevia.com/learn/pregnancy-month-8), day 236 of 280, 33 weeks + 5 days
- Your baby this week: about the size of a pineapple; around 43.7 cm from head to heel
- Canonical URL: https://chorevia.com/learn/pregnancy-month-8/day-236
- Last reviewed: 2026-10-22
- Publisher: Chorevia (https://chorevia.com)
- Cite as: Chorevia. "Day 236: The pool." Last reviewed October 22, 2026. https://chorevia.com/learn/pregnancy-month-8/day-236

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

Thirty-three weeks and five days. On land, you're carrying a pineapple-sized baby and everything that comes with it. In water, most of that weight disappears for half an hour. Today's note is an invitation to the pool.

## Your baby

Around now your baby is around 43.7cm long from head to heel, about the size of a pineapple ([NHS](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/3rd-trimester/week-33/)). Their brain and nervous system are now fully developed ([NHS](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/3rd-trimester/week-33/)). The weeks ahead are mostly about growing and filling out.

## Your body

The NHS's exercise line holds right to the end: 150 minutes a week, starting with 10 minutes a day if you need to ([NHS](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/3rd-trimester/week-33/)). MedlinePlus calls walking and swimming generally safe, effective exercises, and says to talk to your provider before starting an exercise program ([MedlinePlus](https://medlineplus.gov/ency/patientinstructions/000603.htm)). The CDC says activity is healthy and safe for most pregnant women, and to ask your provider about any restrictions ([CDC](https://www.cdc.gov/maternal-infant-health/pregnancy-weight/index.html)).

The AAP's advice for exercise in pregnancy is to drink plenty of water, avoid jumping or jarring movements, and slow down when you need to ([AAP](https://www.healthychildren.org/English/ages-stages/prenatal/Pages/Nutrition-and-Exercise-During-Pregnancy.aspx)). Swimming fits all three. One thing that doesn't: the Office on Women's Health says do not scuba dive during pregnancy ([OWH](https://womenshealth.gov/pregnancy/youre-pregnant-now-what/staying-healthy-and-safe)).

## Try today

### The pool session

- **Time:** 30 minutes, once this week

1. If your provider has given you any limits on exercise, check that swimming is fine for you first ([CDC](https://www.cdc.gov/maternal-infant-health/pregnancy-weight/index.html)).
2. Find a public pool's quieter hours, often mid-morning or early afternoon, and put one session in your calendar.
3. Pack a water bottle along with your towel; the AAP says to drink plenty of water when you exercise in pregnancy ([AAP](https://www.healthychildren.org/English/ages-stages/prenatal/Pages/Nutrition-and-Exercise-During-Pregnancy.aspx)).
4. In the water, go at an easy pace: gentle lengths, or slow laps holding a float. Stop when you've had enough, not when the clock says.

**Make it work:** Wet poolside tiles and a shifted center of balance don't mix. Use the steps or the ladder, not a jump, and take the walk to the changing room slowly.

## Watch for

- **Normal:** a brief pull low in your belly or groin when you turn quickly; moving slowly or changing position may help ([MedlinePlus](https://medlineplus.gov/ency/patientinstructions/000580.htm)). **Call your provider** right away for constant, severe belly pain, or pain with bleeding or fever ([MedlinePlus](https://medlineplus.gov/ency/patientinstructions/000580.htm)).
- **Normal:** a smaller appetite on a warm day. **Call your provider** right away for severe nausea and throwing up; the CDC's line is if you can't drink for more than 8 hours or eat for more than 24 ([CDC](https://www.cdc.gov/hearher/maternal-warning-signs/index.html)).
- **Normal:** tired, heavy legs after a session. **Call your provider** right away for severe swelling, redness, or pain in one leg or arm ([CDC](https://www.cdc.gov/hearher/maternal-warning-signs/index.html)).

## For you

Moving isn't only for your body. The US Physical Activity Guidelines say that for pregnant women, physical activity reduces the risk of postpartum depression ([ODPHP](https://odphp.health.gov/our-work/nutrition-physical-activity/physical-activity-guidelines/current-guidelines/top-10-things-know)).

And it's allowed to just feel good. Floating on your back for a minute in the shallow end, ears under, with the sound of the room gone, is one of the few places left this month where nothing is pressing on anything.

If you're the partner: come along, or mind the house so she can go alone. Either counts.

## Sources

- NHS. "Week 33." Week-by-week guide to pregnancy, Best Start in Life. https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/3rd-trimester/week-33/
- MedlinePlus. "Managing your weight gain during pregnancy." National Library of Medicine. https://medlineplus.gov/ency/patientinstructions/000603.htm
- Centers for Disease Control and Prevention. "Weight Gain During Pregnancy." Maternal and Infant Health. https://www.cdc.gov/maternal-infant-health/pregnancy-weight/index.html
- American Academy of Pediatrics. "Nutrition and Exercise During Pregnancy." HealthyChildren.org. https://www.healthychildren.org/English/ages-stages/prenatal/Pages/Nutrition-and-Exercise-During-Pregnancy.aspx
- Office on Women's Health. "Staying healthy and safe." U.S. Department of Health and Human Services. https://womenshealth.gov/pregnancy/youre-pregnant-now-what/staying-healthy-and-safe
- MedlinePlus. "Aches and pains during pregnancy." National Library of Medicine. https://medlineplus.gov/ency/patientinstructions/000580.htm
- Centers for Disease Control and Prevention. "Urgent Maternal Warning Signs and Symptoms." HEAR HER campaign, 2024. https://www.cdc.gov/hearher/maternal-warning-signs/index.html
- Office of Disease Prevention and Health Promotion. "Top 10 Things to Know About the Second Edition of the Physical Activity Guidelines for Americans." U.S. Department of Health and Human Services. https://odphp.health.gov/our-work/nutrition-physical-activity/physical-activity-guidelines/current-guidelines/top-10-things-know