The Pregnant Mother Runner Diaries is an honest, week-by-week look at running, pregnancy, and motherhood. Hosted by registered dietitian and runner Serena Marie RD, this podcast follows the real-time journey of training, fueling, and navigating the physical and emotional changes of pregnancy while staying connected to running.
Each episode shares behind-the-scenes updates on workouts, nutrition, symptoms, mindset shifts, and the realities of balancing motherhood with athletic identity. Expect practical tips, science-backed insights, and candid reflections for runners who are pregnant, postpartum, or simply curious about how women’s bodies adapt through it all.
If you’ve ever wondered how to keep running through pregnancy, fuel your body well, and embrace the evolving seasons of motherhood and sport, you’re in the right place. 🏃♀️🤰
Pregnancy Week 37: This Pregnancy Did Not Go How I Expected
Week 37 and things are getting HEAVY. My belly is huge, I’m uncomfortable, the lightning crotch and Braxton Hicks are happening constantly, and sleep definitely wasn’t great this week.
But weirdly? I’ve also been feeling pretty good.
This week I hit my highest running mileage in a long time: 15 miles! Hitting double-digit mileage again felt so exciting, especially after a pregnancy where movement looked very different than I expected it to.
I’m sharing an update on my latest labs, including my improved hemoglobin, why my blood pressure has been reassuring at my recent appointments, and where things stand with my concerns around preeclampsia.
I also talk about some less glamorous pregnancy symptoms, including bleeding gums, my suddenly very carb-heavy cravings, and the general reality of being 37 weeks pregnant and VERY ready to meet this baby.
Plus, I’m reflecting on this pregnancy, the movement I was able to do, the expectations I had going into it, and how much I’ve had to redefine what a “fit pregnancy” actually looks like.
Business is prepped for postpartum. Baby can come anytime. I am officially READY.
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Don't forget to follow me on Instagram @runnergirldietitian
29 Sept 2026
Pregnancy Week 36: Baby Is Head Down! + The Emotions of Becoming a Mom of Two
Week 36 and we are officially getting VERY close.
Physically, I’m actually feeling pretty good. The lightning crotch and Braxton Hicks are very real, but I’m so grateful to not be dealing with the constant nausea and exhaustion that followed me through so much of this pregnancy.
Running has also been feeling surprisingly good. My mileage is low, but I have completely let go of needing to hit a certain number each week. I’m running when my body wants to run, resting when it wants to rest, and even went climbing this week. Right now, the goal is less about maintaining fitness and more about going into birth feeling as rested, strong, and restored as possible.
Emotionally, though, this week hit me.
I had this realization that very soon my son won’t be my only child anymore. I’m obviously incredibly excited to meet this baby, but there is also some grief around the end of this chapter where it has just been the three of us. I talk about those feelings, along with some of my anxiety about postpartum and returning to running when I know I’m entering this postpartum period less fit than I was the first time.
I also met with my doulas to finalize my birth preferences, shared my birth plan with my midwives, and I’m sharing some of the things I included in it.
And BIG NEWS: baby is no longer breech!
I also talk more about monitoring my blood pressure and preeclampsia, why I’m prioritizing stress reduction and recovery as birth gets closer, and, on a completely different note, why renting clothes through Nuuly has been one of my favorite pregnancy hacks.
The final stretch is officially here.
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Don't forget to follow me on Instagram @runnergirldietitian
22 Sept 2026
Pregnancy Week 35: Rest Is Training Too
At 35 weeks pregnant, I’m finally feeling more like myself again. I’m definitely getting more uncomfortable, my belly is getting BIG, and bending down has become an athletic event of its own, but compared to the nausea and sickness I was dealing with earlier in pregnancy, I’m feeling so much better.
Running has also been feeling surprisingly good. I ran 7.5 miles this week and have been feeling stronger, while also noticing more cramping and Braxton Hicks as my body gets closer to birth.
This week, I’m shifting more of my focus toward labor prep and trying to enter birth as rested and restored as possible. I’m wrapping up maternity leave prep for my business, making extra dinner so I can stock the freezer for postpartum, and being much more intentional about slowing down.
I also dive into nervous system regulation, what it actually means, why it was something I practiced regularly before becoming a mom, and how motherhood slowly pushed it to the side. As I get closer to birth, I’m bringing some of those practices back and reminding myself of something athletes often struggle to believe:
Rest is training too.
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