Aspire guide
Specific Populations
Specific Populations manual
Relative Energy Deficiency and Stress Fractures in Distance Runners
The direct, devastating link between chronic under-fueling and tibial, femoral, and metatarsal stress fractures in distance runners.
Why this matters
When a cross country runner develops a stress fracture in their tibia or metatarsal, coaches instinctively blame their shoes, the concrete sidewalks, or their running mechanics.
Read time
3 min
Audience
Coach + Parent
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Specific Populations
Start here
Talk to your coach or a trusted adult about your nutrition.
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Talk to your coach or a trusted adult about your nutrition.
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One-page sheet
Relative Energy Deficiency and Stress Fractures in Distance Runners
Read time
3 min
Audience
Coach + Parent
Start with the printable
Talk to your coach or a trusted adult about your nutrition.
Best next move
Use it this week
Talk to your coach or a trusted adult about your nutrition.
Quick reference map
Use the guide like a structured handout
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Format
Read the full ebook here, then jump to the one-page handout when you need the shareable version.
Best use
Open the sections you need, print the handout, then send both to coaches, parents, or athletes.
Quick start
Start here
The direct, devastating link between chronic under-fueling and tibial, femoral, and metatarsal stress fractures in distance runners.
THE ENERGY GAP
1000 Calories
- Running hard burns a lot of energy.
- If you burn 3,000 calories but only eat 2,000, your body is in trouble.
HOW BONES GET STRONG (OR BREAK)
Running usually makes your bones stronger.
- But if you don't eat enough, your body stops making hormones that repair bones.
- Tiny cracks from running don't heal, and your bones get weaker.
SERIOUS WARNING FOR GIRLS!
If a female runner has a stress fracture AND has missed her period, it's a medical…
- Just resting won't fix the real problem.
- Without enough fuel, bones will keep getting weaker, and new breaks will happen.
The RED-S Reality
[!CAUTION]
### The Amenorrhea Emergency
If a female cross country runner presents with a tibial or femoral stress fracture and a clinical history of missed menstrual cycles (amenorrhea), it is an absolute medical emergency.
Coach line
[!CAUTION]
Comparison
The Physiology of a Breaking Bone
Running 50 miles a week places immense repetitive stress on the skeleton.
The Pathological Mechanism
- The Hormonal Shutdown
- The Bone Collapse
The Clinical Consequence
- The brain senses biological starvation and completely halts the production of estrogen…
- Without circulating sex hormones, the human body literally cannot trigger bone turnover…
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Full access opens every section, the ebook PDF, and the printable handout companion.
What to do next
Use it this week
Talk to your coach or a trusted adult about your nutrition.
Source topics
stress fracture runners • RED-S runners • low bone density track • eating disorders track • female athlete triad