2026年05月15日 / ライフスタイル

Exercise during pregnancy isn't just about walking; here's why strength training is gaining attention

Exercise during pregnancy isn't just about walking; here's why strength training is gaining attention

The End of the "Rest Myth" Seen Through New Research and Social Media Voices

When pregnant, you shouldn't lift heavy objects. Avoid exercises that leave you breathless. Strength training is out of the question.

For a long time, such cautious views have surrounded exercise during pregnancy. Of course, pregnancy is a time of significant bodily changes, and overexertion should be avoided. It is also true that there are cases where exercise should be limited, such as bleeding, threatened preterm labor, pregnancy-induced hypertension, placenta previa, and fetal growth restriction.

However, the approach of uniformly applying "rest" or "no strength training" even to pregnancies without complications is now being significantly reconsidered. Recent studies suggest that appropriately adjusted resistance training, or strength training, not only poses no significant risk to the mother and fetus but may also aid in managing health during pregnancy, mental health, and preparing the body for childbirth.

An article distributed in German-speaking regions, "Krafttraining in der Schwangerschaft: Neue Studien widerlegen alte Mythen," symbolically conveys this change. The article introduces recent research and international guidelines on strength training during pregnancy, pointing out that the old image of "pregnancy = a time to refrain from exercise" is shifting to "pregnancy = an important time for health building."

The key point is not that you can train as much as you like during pregnancy. Quite the opposite. What is important is adjusting the type and intensity of exercises according to the course of the pregnancy, exercise experience, physical condition, and gestational week. In other words, the question is not "whether to do it or not," but "how to do it safely."


Research Indicates "Adjustment" Rather Than "Prohibition"

A review on resistance training during pregnancy published in 2024 has organized that strength training can be a safe and beneficial exercise for maternal and fetal health. Particularly noteworthy is the reevaluation of strength training not merely as a means for beauty or body maintenance but as a practical method to cope with the unique physical burdens of pregnancy.

During pregnancy, as the belly grows, the center of gravity shifts, putting more strain on the waist, pelvis, hips, back, and shoulders. In daily life, actions such as standing, sitting, walking, climbing stairs, and turning over in bed require more effort than usual. After childbirth, repetitive physical actions such as breastfeeding, holding the baby, changing diapers, and lifting the stroller increase further.

In this context, strength training during pregnancy can be seen as preparation not to "build up" but to "support the changing body." Maintaining muscle strength, flexibility, and posture-holding ability may lead to reduced back pain, discomfort around the pelvis, and fatigue.

A systematic review published in Acta Obstetricia et Gynecologica Scandinavica in 2025 examined the impact of strength training on quality of life in 1,581 pregnant women across nine randomized controlled trials. It indicated that strength training during pregnancy could have positive effects on controlling excessive weight gain, reducing back pain and sciatica, improving mood, sleep, vitality, and psychological well-being.

Of course, there are limitations to the research. There is variability in the content, frequency, intensity of exercise programs, and the conditions of the subjects, and it is not yet a stage where it can be simplified to "anyone can do this exercise with this weight safely." However, at least the current evidence does not support the idea of uniformly prohibiting strength training for healthy pregnant women.


International Guidelines Also Support "Active Pregnancy"

The World Health Organization, Canada's guidelines on physical activity during pregnancy, and the American College of Obstetricians and Gynecologists recommend about 150 minutes of moderate physical activity per week for pregnant women without complications. Canada's guidelines suggest that combining aerobic exercise with resistance training leads to greater benefits.

Moderate exercise refers to an intensity where the heart rate rises slightly, the body warms up, and breathing becomes labored but conversation is still possible. Known as the "talk test," if you can converse normally during exercise, it is generally not excessively intense. The Borg scale or RPE, which are subjective measures of exercise intensity, are also used.

In strength training during pregnancy, training that challenges maximum weight should generally be avoided. The goal is not to set records but to maintain muscle strength, stabilize posture, reduce fatigue and pain, and prepare for childbirth and postpartum. Exercises such as squats, hip hinges, rowing, light presses, exercises using resistance bands, and movements that stabilize the pelvic floor muscles and core are adjusted according to the gestational week and individual condition.

On the other hand, there are clear precautions. Long periods in a supine position can lead to discomfort or reduced blood flow as pregnancy progresses, so they should be avoided if necessary. Sports prone to falls or abdominal impacts, sudden changes in direction, contact sports, and exercise in excessively hot environments also require caution. Hydration, rest, room temperature management, and sensitivity to physical changes are more important than usual.

In other words, strength training during pregnancy is neither "prohibited because it's dangerous" nor "anything goes because it's safe." More accurately, it can be beneficial if someone without contraindications adjusts appropriately while monitoring their condition.


Welcoming and Anxieties Spread Simultaneously on Social Media

 

The reason this theme is gaining attention is not just research. On social media, many posts express the confusion and experiences of those involved regarding strength training during pregnancy.

In a pregnancy-related community on Reddit, a consultation was posted saying, "My doctor told me to refrain from strength training and recommended yoga. But opinions online are divided, and I don't know what to do." In response, experienced individuals and trainers commented, "If you were strength training before pregnancy, you can often continue by adjusting the intensity and exercises," "Avoid challenging maximum weights," and "Yoga is good, but the advice to uniformly prohibit strength training might be outdated."

Conversely, there are cautious voices saying, "If the doctor advises against it, it's better not to push yourself," and "I switched to yoga and water exercises midway because I felt discomfort around my pelvis and pubic area." Real reactions on social media reveal that exercise during pregnancy is greatly influenced not only by medical correctness but also by personal anxieties, family concerns, medical explanations, and past exercise experiences.

On Instagram, posts introducing the 2025 systematic review and stating "Strength training is possible during pregnancy" and "However, adjustments according to the pregnancy period are necessary" are prominent. Fitness accounts share videos of pregnant women exercising gently with dumbbells and resistance bands, questioning the traditional image of "pregnant women should be treated as fragile."

However, there are risks on social media. Short videos and impactful posts tend to omit scientific conditions and contraindications. If the message "You can handle heavy weights even during pregnancy" spreads alone, there is a risk that those with concerns about their pregnancy progress or beginners might imitate at an unsuitable intensity.

A qualitative analysis of exercise during pregnancy on Reddit, published in 2024, showed that while users understand the benefits of exercise, concerns about risks significantly influence decisions to start, continue, adjust, or stop exercising. Furthermore, a 2026 TikTok analysis reported that even posts by experts on pregnancy nutrition and exercise do not always fully align with guidelines.

Social media can be a place to share experiences and reduce anxiety. However, as medical information, it is a mix of good and bad. Therefore, when you see a post and think "I might be able to do this too," it becomes crucial to consult with your doctor, midwife, physical therapist, or a specialist knowledgeable in prenatal and postnatal training.


Why "Strength Training During Pregnancy" Has Been Misunderstood

The misunderstanding surrounding strength training during pregnancy stems from a culture that views pregnancy itself as a "period to avoid risks." Of course, the awareness to protect the fetus is important. However, if this awareness is too strong, it can underestimate the physical abilities and autonomy of pregnant women.

In the past, research on exercise during pregnancy was insufficient, and medical professionals had to be cautious. Strength training, in particular, was often discussed in connection with heavy objects, abdominal pressure, fatigue, falls, and preterm labor risks. However, in recent years, research on physical activity during pregnancy has increased, and the mainstream view is shifting towards the idea that appropriate exercise is beneficial for health maintenance in uncomplicated pregnancies.

On the other hand, advice in medical settings still varies. The voices on social media saying, "One doctor stopped me from strength training, but another said it's okay to continue," symbolize this transition period. The speed of research updates is outpacing explanations in the field and public understanding.

Furthermore, strength training during pregnancy is highly individualized. The meaning of the same exercise differs between those who trained before pregnancy and those starting exercise for the first time due to pregnancy. Whether it's a singleton or multiple pregnancy, the presence of anemia or hypertension, pelvic pain, morning sickness, sleep conditions, work stress, or a history of miscarriage or preterm birth, the judgment varies.

Therefore, simply saying "strength training during pregnancy is safe" is insufficient. More accurately, the explanation needed is, "If you confirm the conditions for safe execution and adjust the content according to the progress of the pregnancy, it can be a beneficial option for many people."


Expanding New Market in the Fitness Industry

Interest in strength training during pregnancy is also bringing changes to the fitness industry. Prenatal and postnatal training programs, specialized for during and after pregnancy, are becoming a growth area, especially in Western countries.

Traditionally, exercise for pregnant women centered around maternity yoga, walking, and swimming. Of course, these are still valid options. However, in recent years, strength training, pelvic floor muscle training, posture improvement, breathing techniques, and postpartum recovery programs have been combined with these.

Considering postpartum physical recovery, the significance of maintaining muscle strength and body awareness from pregnancy is substantial. After childbirth, due to sleep deprivation, breastfeeding, and childcare, securing personal exercise time becomes difficult. Having a habit of moving the body comfortably during pregnancy may also contribute to postpartum recovery and mental care.

On the other hand, as the market expands, commercial exaggerations also increase. AI apps and online programs now offer menus tailored to gestational weeks, but determining pregnancy progress and contraindications may be insufficient with just on-screen questions. Convenient digital services can be supplementary but do not replace confirmation by medical professionals or certified experts.


How to Actually Incorporate It

When incorporating strength training during pregnancy, the first necessity is to confirm whether exercise is permissible with the current pregnancy progress. Especially if there are symptoms like bleeding, severe abdominal pain, dizziness, shortness of breath, chest pain, suspected amniotic fluid leakage, regular contractions, or changes in fetal movement, consulting a medical institution should take precedence over exercise.

Even if there are no problems, beginners do not need to handle heavy dumbbells or barbells right away. Starting with bodyweight squats, sit-to-stand exercises using a chair, back exercises with resistance bands, light hip lifts, wall push-ups, and stability training in side-lying or quadruped positions is possible. The goal is not to "push to the limit" but to "maintain a body that can move comfortably."

Those who trained before pregnancy do not necessarily need to stop everything. However, challenging maximum lifting weights, movements that involve holding breath with heavy weights, high-risk movements for falls, and exercises that put strong pressure on the abdomen should be avoided or modified in consultation with a specialist. As the gestational weeks progress, supine exercises are often changed to inclined, side-lying, seated, or standing positions.

During exercise, use the ability to converse as a guideline for intensity. Stop if dizziness, nausea, abdominal pain, bleeding, shortness of breath, or severe fatigue occurs. Avoid exercising in hot places, hydrate, and take breaks. If a "pleasant fatigue" remains after training, that's good, but if strong fatigue or pain persists until the next day, the load may be too high.

Also, in strength training during pregnancy, it is better not to make appearance changes or muscle mass increase the main goal. Weight and body shape naturally change with pregnancy. Strength training is done not to resist these changes but to support the body.


From Old Myths to Individualized Exercise

The debate over strength training during pregnancy is not just a fitness trend. It reflects societal values on how pregnant women are perceived.

The idea that pregnant women are weak and should not move may seem kind at first glance. However, if it becomes excessive, it can deprive pregnant women of their bodily awareness and choices. Conversely, messages like "You can train even during pregnancy" or "Become a strong mother" can become another form of pressure if taken too far.

What is needed is not an extreme on either side. Not being blamed whether you exercise or not. Ensuring that safe information reaches those who want to exercise. Providing options for those who are anxious to start gradually without pressure. And having medical and exercise professionals provide individualized advice based on updated evidence, not old assumptions.

Strength training during pregnancy is no longer just a topic for athletes or fitness enthusiasts. It is becoming a realistic option for those who want to reduce back pain, maintain stamina for childbirth, prepare for postpartum childcare, or alleviate mood swings.

However, the entry point is not "try harder" but "listen closely to your body."

What new research is refuting is not caution itself. What is being refuted is the baseless blanket prohibitions and the old myths of treating the pregnant body as overly fragile. Future exercise during pregnancy should be supported by knowledge, not fear, and by adjustment, not endurance.


Source URL

German article on strength training during pregnancy. Base information on research trends, guidelines, changes in awareness on social media, and the expansion of the fitness market.
https://www.ad-hoc-news.de/wissenschaft/krafttraining-in-der-schwangerschaft-neue-studien-widerlegen-alte-mythen/69338110

2024 Review: Paper information organizing the safety of resistance training during pregnancy and its benefits to the mother and fetus.
https://pubmed.ncbi.nlm.nih.gov/38912201/

2025 Systematic Review: Research examining the impact of strength training during pregnancy on quality of life, back pain, mood, sleep, weight gain, etc.
https://obgyn.onlinelibrary.wiley.com/doi/10.1111/aogs.15122

Canada's Guidelines on Physical Activity During Pregnancy: Information on 150 minutes of moderate exercise per week, combining aerobic and resistance training, contraindications, and precautions.
https://www.sciencedirect.com/science/article/abs/pii/S170121631830567X

WHO Physical Activity and Sedentary Behavior Guidelines: International foundational information on recommended physical activity, including during pregnancy and postpartum.
https://www.who.int/publications/i/item/9789240015128

ACOG Exercise During Pregnancy FAQ: General exercise information recommending about 150 minutes of moderate exercise per week during pregnancy.