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A stress fracture does not automatically mean you trained too much—or trained badly.

For endurance athletes, bone stress injuries often develop when training load begins to outpace the body’s ability to recover, rebuild and adapt. In this episode, Coach Justin and Coach Katie break down the bigger picture behind stress fractures, including training progression, underfueling, low energy availability, aging, hormones, nutrient intake and strength training.

If you are increasing mileage, returning to running, training through weight loss or simply wondering how a fit athlete can still end up with a bone injury, this conversation will help you understand what may be happening beneath the surface.

What You’ll Learn

• Why a well-designed training progression can still lead to problems when fueling and recovery do not keep pace
• How low energy availability, rapid weight loss and hormonal changes can affect bone health
• Why cardiovascular fitness and strength do not automatically mean your bones are ready for running impact
• How strength training, progressive loading and key nutrients can help support long-term bone durability

Timestamps

00:00 Why stress fractures are more complicated than “too much training”
06:05 How bone adapts, remodels and responds to load
15:15 Training load, recovery and nutrition: finding the cause
20:21 Rapid weight loss, GLP-1s and bone-health risk
26:25 Calcium, vitamin D, iron and other nutrients that matter
40:05 Low energy availability, RED-S and underfueling
45:32 Aging athletes, hormones and declining bone density
48:08 Strength training and loading bones as you age
54:27 Why running, cycling and swimming affect bones differently
56:05 Why being fit does not mean your bones are ready to run
1:03:34 High-volume training is not the real problem
1:05:44 Stress-fracture location and what it may tell you

For coaching inquiries:

Coach Katie → https://fuel2run.com

Coach Justin → https://tabularasaracing.com

Podcast Email → theenduranceathletejourney@gmail.com