Why Childbirth Belongs in an Athlete’s Injury History

When we talk about an athlete’s injury history, we usually make a list.

Ankle sprain. ACL reconstruction. Stress fracture. Hamstring strain. Surgery.

But there are major physiological events that rarely make that list.

Childbirth is one of them.

Faith Kipyegon’s recent hamstring issues made me think about this.

Kipyegon is one of the greatest middle-distance runners we have ever seen. She has won multiple Olympic and World Championship titles and broken world records across multiple distances.

But there is another important part of her physical history.

In June 2018, Kipyegon gave birth to her daughter, Alyn. The delivery required a C-section after complications related to the baby's positioning. She subsequently took an extended period away from running before beginning the difficult process of returning to elite competition.

What happened after she returned is interesting.

2018 — Pregnancy and C-section
2019 — Adductor magnus injury
2019 — Stress fracture
2019 — Nagging hip problem
2024 — Muscle injury
2026 — Persistent hamstring problem

Does childbirth explain those injuries?

Absolutely not.

But should childbirth be part of the history we consider when trying to understand them?

I believe it should.

Pregnancy Changes More Than We Often Consider

Pregnancy isn't simply nine months during which an athlete carries additional weight. The entire system adapts.

The abdominal wall expands dramatically. The pelvic floor experiences increasing mechanical demand. The position and function of the diaphragm can change. The pelvis accommodates a growing uterus, while changes in body mass and its distribution alter how forces are managed throughout the body.

There are significant hormonal changes as well. Relaxin, estrogen and progesterone all contribute to a physiological environment that is very different from the one that existed before pregnancy. Following delivery, that environment changes again. Breastfeeding may further influence the hormonal environment, including estrogen availability.

Then comes the delivery itself.

In Kipyegon's case, this included abdominal surgery.

A C-section requires surgical access through multiple layers of the abdominal wall and associated connective tissues before reaching the uterus. Those tissues subsequently have to heal while the mother is recovering from pregnancy, caring for a newborn and eventually preparing to return to sport.

And for Faith Kipyegon, "returning to sport" doesn't mean jogging a few times a week.

It means returning to world-class middle-distance running, producing and absorbing enormous forces thousands of times at extraordinary speeds.

That's not simply recovery.

That's reconditioning.

The Pelvis Doesn't Work in Isolation

This is where my osteopathic background influences how I look at a history like this.

One concept taught within osteopathy is sometimes described as the Gynaecological Star.

Rather than looking at the reproductive organs as structures sitting independently inside the pelvis, this model encourages us to consider their fascial and ligamentous relationships with the surrounding system.

The uterus has relationships with the sacrum, pelvic walls, inguinal region and surrounding pelvic structures. The pelvic floor interacts with the abdominal wall above and the hips below. The sacrum interacts with the pelvis. The pelvis interacts with the lumbar spine.

And around this same region are the muscles responsible for producing and controlling enormous forces during running — including the adductors, hamstrings and gluteal complex.

This doesn't mean that a restriction in one structure automatically causes an injury somewhere else.

And it certainly doesn't mean a C-section caused Kipyegon's later injuries.

The Gynaecological Star is an osteopathic clinical model for considering relationships within the pelvis, not proof of causation.

But it does encourage us to ask a question I think is incredibly important:

Has the entire system recovered and adapted to what happened to it?

Healing Isn't Necessarily Reconditioning

We tend to look at surgical scars superficially.

The skin heals. The incision looks good. The athlete doesn't have pain.

We assume the surgery is behind them.

But healing and reconditioning aren't necessarily the same thing.

Scar formation occurs through multiple tissue layers. The abdominal wall needs to regain its ability to manage pressure and transfer force. The diaphragm, abdominal musculature and pelvic floor have to coordinate effectively again.

Then we ask the athlete to sprint.

For an elite 1500m runner, the pelvis has to repeatedly transmit force between the trunk and lower extremities while the hips move through thousands of high-speed cycles.

The adductors and hamstrings don't operate independently of that system.

Again, this doesn't mean Kipyegon's C-section caused her later adductor, hip or hamstring problems.

It means I wouldn't evaluate those structures without knowing that history.

The Hormonal Story Matters Too

There is also the hormonal component.

Pregnancy produces enormous endocrine changes. After delivery, those hormones change again. Breastfeeding can further influence that environment.

For an elite female endurance athlete, this becomes particularly interesting when we start thinking about bone health.

Kipyegon sustained a stress fracture during the season following her return from pregnancy.

Can we say the two were connected?

No.

We don't know enough.

We would need to know the location of the fracture, her bone density, nutritional status, menstrual function, breastfeeding history, training progression and a number of other factors before making that connection.

But those are exactly the questions I would want to ask.

Because the stress fracture shouldn't simply become another isolated line on an injury timeline.

And Then There's the Emotional Component

This might be the easiest part to overlook.

Becoming a mother changes far more than physiology.

Kipyegon has spoken publicly about the uncertainty surrounding her return and wondering whether she would ever regain her previous level.

Think about what that means for an elite athlete.

Your body has changed. Your identity has changed. Your responsibilities have changed. Your sleep may have changed. Your training environment has changed.

And you're trying to return to being one of the fastest women in the world.

Stress isn't separate from physiology.

The nervous, endocrine and immune systems continually interact with the mechanical system we spend so much time assessing.

That's why I don't think an athlete's emotional history should be separated completely from their physical history.

It's all part of the same person.

Performance Doesn't Tell Us the Whole Story

Perhaps the most remarkable part of Kipyegon's story is what happened next.

She didn't simply return.

She became even better.

She returned to become an Olympic champion again, a multiple-time world champion and a world-record holder.

And I think that teaches us something important.

An adaptation doesn't necessarily prevent performance.

The human body is extraordinarily good at finding solutions. Athletes can compensate incredibly well. They can win. They can break records. They can become the best in the world.

Extraordinary performance doesn't necessarily tell us everything about how the body arrived there.

Which brings me back to her current hamstring problem.

I'm not looking at Kipyegon's history and saying:

C-section → hamstring injury.

That would be irresponsible.

I'm looking at pregnancy and C-section in 2018, followed by an adductor injury, stress fracture and hip problem in 2019, another muscle problem in 2024 and a persistent hamstring issue in 2026.

And I'm asking:

Are any of these events connected by the adaptations that occurred between them?

Maybe they are.

Maybe they aren't.

But that's the investigation.

What Would I Want to Know?

If Faith Kipyegon walked into my clinic today with a hamstring problem, I wouldn't begin her history in 2026.

I'd want to understand the previous muscle injury and hip problem. I'd want to know exactly where the stress fracture occurred and which side the adductor injury occurred on.

And eventually, I'd go back to 2018.

How was the pregnancy?

How was the delivery?

How did the C-section heal?

Was she breastfeeding when she returned to training?

How did her menstrual cycle respond?

How quickly did her running volume return?

How did her abdominal wall and pelvic floor recover?

Did anything feel different after childbirth?

And what was happening emotionally during all of this?

I'm not asking those questions because I'm trying to prove childbirth caused her hamstring injury.

I'm asking because I'm trying to understand everything her system has had to adapt to before the hamstring became painful.

That's a very different way of taking an injury history.

And it applies far beyond Faith Kipyegon.

For female athletes who have given birth, pregnancy and childbirth shouldn't sit in a completely separate "medical history" box while we analyze their musculoskeletal injuries.

They are significant mechanical, physiological, hormonal and emotional events.

They belong on the timeline.

Because injury history isn't simply a record of what hurt.

It's the story of what the entire person has had to adapt to.