Can You Do CrossFit While Pregnant? A Trimester Guide from a Brianna Battles PPA-Certified Coach

The first thing to know: yes, you can. For most women with a healthy pregnancy and OB clearance, continuing to train through pregnancy is what current sports medicine recommends. The question is not whether to train. It's how to train, and what to modify when.

I'm Annie Brunner, co-owner of Alpine CrossFit and a Brianna Battles-certified Pregnancy & Postpartum Athleticism (PPA) Coach. This post is the trimester-by-trimester framework I use with Alpine members who are pregnant or planning to be.

Two things this post is not:

• It is not medical advice. Your OB/GYN and a pelvic floor physical therapist are essential partners. Coach and clinician are different jobs, and the best return-to-training works with both.
• It is not a "scale everything down" lecture. Brianna's whole point is that athletes don't disappear because they're pregnant. The work changes; you don't.

The framework: Brianna Battles' approach to pregnancy & postpartum athleticism

Brianna Battles built Pregnancy & Postpartum Athleticism around treating pregnancy and postpartum as athletic phases that deserve sport-specific coaching — not generic prenatal exercise. The framework rests on a handful of principles I bring to every pregnant or postpartum athlete at Alpine:

• Pressure management. Your deep core — diaphragm, transverse abdominis, pelvic floor, multifidus — manages intra-abdominal pressure as a system. Pregnancy changes how that system works. Training has to respect that.
• Optimal alignment. Rib cage stacked over pelvis. Neutral pelvis. As the bump grows, alignment drifts — coaching pulls it back.
• Breath as a tool. Inhale to prepare, exhale on exertion. This is not a rule we add for pregnancy. It's a rule that becomes louder during pregnancy and postpartum.
• Symptoms are data, not failure. Coning (doming) of the abdomen, leakage, heaviness, or pain are signals. You modify, you don't push through.
• Pelvic floor first. It's part of the core. Train it actively. Don't ignore it.

The whole framework is a lens, not a checklist. Every modification below comes out of it.

First trimester (weeks 1–13)

Most athletes feel surprisingly normal in the first trimester, with two big exceptions: fatigue and nausea.

Keep doing:

• Whatever you were doing before, mostly — assuming a healthy pregnancy and OB clearance.
• Lifting, gymnastics, conditioning. Intensity is up to you and your body.

Start modifying:

• Breath. Stop holding through heavy reps — exhale on the work.
• Stop chasing PRs. This is not the season for them.
• Listen to fatigue and nausea hard. Some days you train. Some days you walk.

Stop:

• Box jumps with rebound — pelvic floor impact stacks with hormone-driven joint laxity. Step-ups instead.
• Hot training environments (sauna at intensity, outdoor lifts in summer heat).

Second trimester (weeks 14–27)

This is the "honeymoon" trimester for many — energy returns, the bump is not yet limiting. It's also when pressure-management modifications start to matter most.

Keep doing:

• Lifting, scaled to feel. Most athletes back off load, not movement.
• Conditioning at conversational-to-moderate pace.
• Strict gymnastics that does not trigger coning.

Modify:

• Skip prone work (push-ups on the floor, prone planks). Incline push-ups on a box or barbell instead.
• Pull anything that bulges the abdomen — sit-ups, V-ups, hollow holds. Sub in side planks, bird dogs, dead bugs, Pallof presses.
• Watch for coning — a vertical ridge bulging up the center of your abdomen during effort. It's intra-abdominal pressure escaping where it shouldn't. Drop the load or modify the movement.
• Olympic lifts — most athletes drop the catch and stop the lift at the high pull, or move to dumbbell variations.

Stop:

• Kipping pull-ups and toes-to-bar — the kinetic load on the linea alba is a lot for a growing belly. Strict pulls or ring rows instead.
• Anything supine for long stretches (flat on your back) after roughly week 16–20.

Third trimester (weeks 28–40)

The bump is the bump. Coaching becomes about preserving capacity for delivery and recovery — not chasing new fitness.

Keep doing:

• Walking, rowing, biking, swimming.
• Squats, deadlifts, presses — at loads that feel easy. Movement is the goal.
• Specific pelvic floor and breath work.

Modify or stop:

• Most jumping. Most barbell cycling.
• Anything that feels like it's pulling apart your midline. Coning is the bright-line "stop, modify."
• Anything that creates leakage or pelvic heaviness. These are data. You don't push through them.

When to call your team

Brianna's framework is built around partnership, not solo coaching. The people on your team:

• OB/GYN — anything painful, abnormal, or worrying. Always.
• Pelvic floor PT — once during pregnancy, ideally. Mandatory postpartum. Your coach is not a substitute.
• PPA-certified coach — programming, modifications, day-to-day decisions inside the gym.

The best outcomes I see at Alpine are athletes whose coach, OB, and PT are all in the loop and pointing the same direction.

What comes next: postpartum return

This post is about pregnancy. The return to training after birth is its own — much longer, much more nuanced — story. The six-week OB clearance is not a return-to-training plan; it's a starting point. I'll cover the postpartum framework in the next post in this series.

In the meantime: if you're an Alpine member or thinking about becoming one and you're pregnant, planning to be, or working back from a recent birth, this is what I do every day. Come in for a No Sweat Intro or grab a coach conversation. The work is here, and there's a credentialed coach behind it.