Fitness Guide For Pregnancy
- Maike Mancuso
- Mar 5
- 11 min read
A Practical & Detailed Guide for Fitness options
during Pregnancy - Trimester breakdown
& top resources for a healthy pregnancy!
Important note before we begin:
This guide is for educational purposes only. It does not replace medical advice, personal training guidance, or care from a qualified prenatal specialist. Always speak with your OB-GYN, midwife, pelvic floor physical therapist, or healthcare provider before starting or continuing any exercise program during pregnancy. Get clearance. Make sure any movement plan fits your specific body, history, and pregnancy. This post includes affilaite links to products I truly believe. Qualifying purchases may earn me a commission. I only link products I trust to be helpful and fitting.
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Over the last decade, research and clinical practice around prenatal fitness have changed significantly. We now understand that for healthy pregnancies with no medical complications, regular movement supports both baby and mom - and I am not just talking about moderate intensity or pregnancy yoga! Let's dive in.
This guidance aligns closely with recommendations from the American College of Obstetricians and Gynecologists and their prenatal exercise guidelines in the United States. There are also emerging resources and growing support for strength training, core-focused work, and intentional movement during pregnancy. For most healthy moms, movement is not only safe. It is encouraged.
WHY WORKING OUT DURING PREGNANCY MATTERS
Benefits for mom:
Regular exercise supports circulation and cardiovascular health. It reduces back pain, improves posture, strengthens muscles that stabilize joints, and helps manage pregnancy-related discomfort. Research shows lower risk of gestational diabetes, better weight management within recommended ranges, and improved mood regulation in active mothers. Exercise also improves sleep quality and builds stamina for labor and delivery. Stronger muscles and better coordination support smoother postpartum recovery and that is a real win! Prepare for your postpartum recovery during pregnancy.
Benefits for baby:
Movement supports healthy placental blood flow and oxygen delivery. Studies suggest improved fetal heart rate variability and healthy birth weight ranges. By lowering maternal risk factors such as gestational diabetes and hypertension, exercise indirectly supports long-term health outcomes for baby.
Research supports moderate exercise for at least 150 minutes per week in uncomplicated pregnancies. Yet, it is not one size fit all - many mamas can maintain a higher intensity of workouts, depending on their health and fitness level. How can you establish what is right for you?
KNOW WHERE YOU ARE STARTING
Every pregnancy fitness journey begins with your baseline. Were you strength training consistently before pregnancy? Were you sedentary? Are you an endurance athlete? Is this your first pregnancy or your third? A well-trained athlete may safely continue higher-level activity with modification and clearance. A mama new to exercise should build gradually and focus on foundational strength and coordination. There is no universal template. Be honest about your starting point.
2. TALK TO YOUR CARE TEAM
Before beginning or continuing exercise, confirm you do not have contraindications and review any pregnancy-specific concerns. Your care team may include your OB-GYN, midwife, pelvic floor physical therapist, doula, chiropractor, or prenatal fitness professional.
Ask questions and request clarification, if needed. If something is outside a provider’s expertise, ask for referral. You deserve informed support.
If something feels off, painful, dizzy, heavy, or unusual. Stop, modify or check in with your care team to understand what might be going on for you.
3. CHOOSE MOVEMENT YOU ENJOY
Sustainable exercise wins and we are most consistant when we enjoy what we are doing.
Good options for most pregnancies:
• Walking
• Strength training
• Swimming
• Prenatal yoga
• Stationary cycling
• Low-impact cardio
• Modified Pilates
*Think about where you enjoy working out (at home, outside, at a gym), alone or with a group or friend, what type of exercising do you enjoy? Build a simple plan that excites you.
Avoid activities with high injury or fall risk such as skydiving, scuba diving, contact boxing, martial arts with impact, and unstable high-fall sports.
Every pregnancy is different. Some continue running until delivery and others may have to scale back early. Both are valid.
4. MODIFY AS YOU PROGRESS
Your body changes rapidly. Adjust your training as each trimester unfolds and check in with your daily energy level and well-being. Move with lots of grace and care.
TRIMESTER BREAKDOWN
First Trimester: Weeks 1 to 12
From a structural standpoint, your body often feels relatively normal in early pregnancy. The baby is very small and well protected within the pelvis. Your abdomen has not expanded significantly. Your center of gravity has not shifted. Connective tissues have not yet stretched dramatically.
Mechanically, most women can continue many of their usual exercises during this phase if they were already part of their routine and they have medical clearance. There is no specific early movement pattern in a healthy pregnancy that inherently harms the baby. Twisting, strength training, and moderate impact are typically safe when previously tolerated.
What changes rapidly are internal systems.
Hormones shift significantly. Blood volume begins increasing. The placenta develops. Metabolic demand rises. These changes create real physical effects.
Many mamas experience:
Fatigue
Nausea or morning sickness
Breast tenderness
Dizziness
Headaches
Food aversions
Mood swings
Exhaustion
Some women feel mild symptoms. Others feel completely depleted. Your exercise plan must adapt to how you feel. If you are exhausted, lower intensity. Shorten workouts. Focus on maintenance. If nausea is strongest in the morning, move later in the day. If your body asks for rest, listen.
Supportive movement during the first trimester includes:
Light to moderate strength work
Walking
Swimming
Gentle yoga or Pilates
Daily breathing practice
Gentle core connection
Hydration and adequate nutrition are essential.
Your body is building a placenta and growing new life. Fuel accordingly.
If you are unsure about specific exercises, speak with your provider. When in doubt, skip what does not feel good.
Second Trimester: Weeks 13 to 27
Many mamas feel more stable during the second trimester. Energy often improves. Nausea decreases. Training can feel more manageable. At the same time, physical changes become visible. The uterus grows upward. The abdomen expands, which can be the start of Ab seperation (Diastasis Recti). Your center of gravity shifts forward. Ligaments become more lax due to hormonal changes. Blood volume continues increasing.
Every pregnancy looks different, and so does the way your body carries your baby. Some women carry smaller and show later. Others show earlier and more prominently. If your bump stays smaller for longer, you might feel comfortable continuing certain exercises deeper into pregnancy. If you begin showing earlier, you may need modifications sooner simply because the physical load on your body increases more quickly. Neither experience is better or worse. Your exercise journey simply needs to match the way your body changes and adapts.
During the second trimester, many professionals recommend reducing deep twisting movements and traditional abdominal exercises like crunches and sit-ups. This recommendation is rooted in how your body adapts to support your growing baby. As your belly expands, the linea alba, the connective tissue between your abdominal muscles, stretches and thins to create space. This process is natural and necessary, but it also means your core system becomes less stable. Movements that place significant outward pressure on the abdominal wall can become harder to control and may contribute to excessive strain.
Exercises like planks, crunches, and other strong “six-pack focused” movements increase intra-abdominal pressure. When the connective tissue is already under tension, your body may struggle to manage this pressure effectively. With proper training, you can learn to support your core by activating the deep abdominal muscles and using your core as a pressure-regulating system. Still, factors like connective tissue elasticity, the degree of abdominal separation, and your pre-pregnancy training history all influence how well you can stabilize these movements. Because of this variability, easing up on intense abdominal exercises is often a smart and preventative choice during this phase.
If you want to safely strengthen your core during pregnancy, focusing on deep core training is far more supportive than traditional abdominal workouts. You can learn how to activate these muscles properly in my article on three foundational deep core exercises.
Deep twisting is also reduced during pregnancy for an important anatomical reason. Your uterus is supported by round ligaments that anchor it within your pelvis. You can think of these ligaments like supportive straps that help hold everything in place. When you are not pregnant, the uterus is small and these ligaments are relatively short. As your baby grows, the uterus expands significantly, which places constant tension on these ligaments as they stretch to accommodate that growth.
Forceful trunk rotations and deep twisting add additional strain to tissues that are already under load. Quick or aggressive rotational movements can overstretch the round ligaments, which often leads to sharp or lingering internal discomfort. This sensation can persist and become increasingly uncomfortable as pregnancy progresses. To prevent unnecessary strain, gentle rotational movement is preferred, especially through the upper back and ribcage rather than the midsection.
High-impact exercise is another area where modifications may be helpful. This is not a universal restriction. Some women can continue higher-impact activity comfortably throughout pregnancy. Others may notice symptoms that signal the need to reduce intensity. Feelings of pelvic heaviness, pressure, urine leakage, or discomfort in the lower back, hips, or pelvic floor can indicate that your system would benefit from lower-impact options. Adjusting intensity helps protect the pelvic floor and core while still allowing you to stay strong and active.
Backbends are another movement pattern that often needs modification during pregnancy. As your belly grows, your center of gravity shifts forward, which naturally increases the curve in your lower back. Your body already works harder to stabilize your spine and pelvis in this position. Deep backbends exaggerate this curve even more and can place excessive compression on the lumbar spine.
Pregnancy hormones like relaxin also soften your ligaments to prepare your body for birth. While this increased flexibility can feel good, it reduces joint stability. Pushing into deep spinal extension during backbends can strain the small stabilizing muscles of the spine and stress joints that are already more mobile than usual. This combination raises the risk of discomfort in the lower back and sacroiliac joints.
Backbends also stretch the abdominal wall, which is already lengthening as the uterus expands. Placing the abdominals under strong stretch while they are managing increased internal pressure can make it harder for the core system to provide support. For women experiencing abdominal separation, deep extension may further challenge the connective tissue that is working to maintain tension across the midline.
Gentle, supported chest-opening movements can still feel great and help counteract the rounded posture many women develop during pregnancy. The key is avoiding large, uncontrolled ranges of spinal extension and focusing instead on controlled mobility, good alignment, and deep core engagement.
The goal is not to avoid extension entirely. The goal is to protect your spine, support your core, and move in ways that match the physical demands of pregnancy. Learn to move in ways that support your changing body and help you feel strong, capable, and pain free throughout pregnancy.
Begin paying close attention to positioning and pressure management.
If lying flat on your back causes dizziness or discomfort, transition to incline or side-lying positions. The growing uterus can compress the inferior vena cava, reducing blood return and causing lightheadedness. Monitor abdominal pressure. As your abdomen stretches, tension across the midline decreases. Diastasis recti, a natural separation of the abdominal wall, develops to create space for baby. This is normal. What matters is how you manage pressure.
So in short:
Reduce or modify classic high-pressure core exercises such as:
Crunches
Full sit-ups
Russian twists
Long-duration planks
Deep twisting from the mid back
Backbends
Laying on your back for prolonged periods of time (if you get light headed or dizzy)
High impact exercises
Instead focus on:
360 breathing
Connection breath
Heel slides
Bird dogs
Side-lying core workIncline planks if tolerated
Impact tolerance is individual. Some women run comfortably through this trimester. Others notice pelvic heaviness, leakage, or increased pressure. These symptoms signal a need to scale back.
Continue strength training with attention to alignment, breath coordination, and controlled tempo. Replace heavy bilateral lifts with staggered stances when helpful. Slow down transitions. Protect balance. Keep communication open with your care team. You are not meant to navigate these changes alone.
Third Trimester. Weeks 28 to Birth
The third trimester brings significant mechanical load. The abdomen is larger. The diaphragm has less space to descend. Shortness of breath becomes common. Pelvic pressure increases. Balance changes are more noticeable. This phase is about preparation, not progression.
Reduce load. Increase rest between sets. Emphasize stability. All second trimster recommendations apply here as well. Starting at around 34-37 weeks, you can start adding labor prep training into your routine. Train for mobility for birth positions, add Labor Intensity training to train in a manner that mimics the flow of contractions, add breathing exercises and core work into your routine to be ready.
Focus on:
Supported squats
Glute bridges
Rows and upper back strength
Hip stability
Gentle mobility
Walking as tolerated
Daily breathwork
High-impact and aggressive directional changes should be reduced unless you are symptom-free and cleared.
Even if you feel strong, your connective tissue is under high demand. Respect that load.
FOURTH TRIMESTER. POSTPARTUM RECOVERY
Birth is a major physical event regardless of delivery type.
The first two weeks postpartum should prioritize rest, gentle walking when cleared, and daily 360 breathing. Reestablish awareness before intensity.
Between weeks two and six, gradually increase walking and continue deep core and pelvic floor coordination work.
If you notice abdominal bulging, pelvic heaviness, leakage, increased bleeding with activity, or sharp pain, reduce intensity and consult your provider or pelvic floor specialist.
Rebuilding strength begins with breath. Progress to low-load controlled strength. Reintroduce impact only after core control and pelvic floor strength return.
The best postpartum recovery starts during pregnancy. Practicing breath coordination and alignment before birth builds awareness that supports reconnection later.
REMINDER
Some mamas run until delivery. Others walk slowly by week ten.
Pregnancy increases systemic demand. Blood volume rises. Connective tissue changes. Even when you feel capable, your body works harder behind the scenes.
Train with awareness. Modify with intention. Recover with patience.
My top tips to set yourself up for success:
Pregnancy is the time to build your base.
Start learning how your deep core and pelvic floor work together. Train your breath. Improve posture. Practice proper core engagement during higher pressure moments like lifting, getting out of bed, or carrying toddlers.
These small daily reps matter.
When you understand how to connect to your deep core system, you:
• Support your growing belly with better alignment
• Reduce common aches in the back, hips, and pelvis
• Create stability during strength training
• Prepare your body for the intensity of labor
• Improve recovery in the weeks and months after birth
The groundwork you lay now shapes your postpartum experience.
If you want step by step guidance, structured workouts, and education around breath, alignment, and pelvic floor strength, my Core Restore program walks you through it in a clear and progressive way. You will learn how to activate your deep core properly and build strength without adding unnecessary pressure.
The Sculpt Society offers a dedicated pre and postnatal program with low impact sculpt workouts, strength sessions, and cardio options designed for pregnancy and postpartum. The classes are approachable, efficient, and realistic for busy moms. If you want additional guided workouts that complement your core training, this platform is a great addition.
Birth Education and Mental Preparation
Physical strength matters. Mental preparation matters just as much.
I recommend exploring programs through Birth and Baby University to help you understand the stages of labor, pain management options, and what to expect in the early newborn phase. When you know what is happening in your body, fear decreases and confidence grows.
Courses (Self-pace virtual courses)
You can also review my related blog posts:
These resources help you feel organized and prepared so you can focus on the experience itself.
Pregnancy is a transition. You can approach it passively, or you can train for it with intention.
Build strength. Build awareness. Build your foundation.
Your future postpartum self will thank you.
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