Why You Keep Gassing Out During Your 5k


Hey there Reader

Ever find yourself halfway through your 5k feeling like your legs are toast and you just can’t hold pace? That “gassing out” moment is more common than you think—and it’s 100% fixable.

Here’s what’s happening:
Your body uses three energy systems when you run. If you don’t train them properly—especially your aerobic “diesel truck”—you’ll keep hitting that wall.

Here’s what works:

  • -> Build your aerobic engine with long, easy runs.
  • -> Add smart speedwork like tempo runs and VO2 max intervals to push your ceiling higher.
  • -> Use shorter intervals and hills to train your body to handle the burn.
  • -> Add strides to keep your legs feeling fast for that finishing kick.

It’s not about trying harder—it’s about training smarter.

If you want a simple weekly plan for a stronger, faster 5k, I’ve got you covered.

Read the full breakdown here: [link to full blog post]

Trust the process. Build the engine. The speed will come.

Read the full article here: https://therunnerdoc.com/5k-foundations/

Watch the video here:

video preview

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Hope you had a great time and found something useful! I'm here to help!

Keep Running!

Doc Abby


The Runner Doc

Helping you stay injury free and on the road (or trail) running!

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A Doctor of Physical Therapy keeping runners of all shapes and sizes injury free (specifically those over the age of 35). Running Tips, home workouts, & rehab. Strength and Injury Prevention for Runners