In this episode of The Rucker’s Edge, Dr. Ryan Peebles, Doctor of Physical Therapy and founder of Core Balance Training, unpacks what’s really happening to your spine when you ruck under load.

Dr. Peebles explains why rucking back pain is rarely about having a “weak core” and is more often tied to poor core endurance, breathing mechanics, and loss of spinal stability as fatigue sets in. Rather than chasing sit-ups or isolated ab exercises, he introduces the concept of core connection (the ability to maintain intra-abdominal pressure and spinal support for long periods of time).

You’ll learn how added ruck weight increases the same forces already acting on your spine, why posture tends to break down when the core fatigues, and how common patterns like anterior pelvic tilt show up during long rucks. Dr. Peebles also highlights the often-overlooked role of breathing in spinal stability and explains how improper breathing can turn your core into a “flat tire” under load.

This conversation also covers practical warning signs ruckers should not ignore, how to listen to early signals from your body before pain becomes chronic, and simple warm-up strategies to activate the core before stepping off.

Links & Resources:

• Core Balance Training Website
• Core Balance Training on Youtube
• Dr. Ryan Peebles' Podcast: The Back Pain Podcast
• The Rucker’s Edge Website
• The Rucker's Edge on Instagram

Notes:

• Music Credit: “Play This Game” by Black Rhomb.
• I’m not a doctor, and this podcast is for informational and entertainment purposes only. Please consult with your physician before starting any new exercise or physical activity.