Walking with a weighted backpack - combining Zone 2 cardio benefits with resistance training for a simple, low-impact exercise that builds strength-endurance and burns more calories than regular walking
Rucking is walking's upgrade. You get all the benefits of a long walk - cardiovascular health, mental clarity, time outdoors - plus a strength stimulus that regular walking can't provide. It builds your legs, core, and posture while staying low-impact and joint-friendly.
Start with 20 lbs and walk your normal route. That's it. No gym, no equipment beyond a backpack and some weight. Progress slowly (add 5 lbs every few weeks), keep your pace conversational, and you've got a complete cardio + strength workout. Ideal for people who find running too hard on joints, want to make walks more productive, or need a simple outdoor training option.
Science & Mechanisms
Mechanisms:
- Increases metabolic demand 2-3x over unloaded walking at same pace
- Loads spine and legs, stimulating bone density adaptations
- Engages core and posterior chain to stabilize load
- Maintains Zone 2 heart rate range with added resistance
- Low-impact: no pounding forces like running
Key concepts:
- Rucking is "loaded locomotion" - humans evolved carrying things
- Caloric burn scales roughly with total weight moved (body + pack)
- Heart rate increases ~10-20 bpm versus unloaded walking at same pace
- Postural muscles work continuously to stabilize the load
- Ground reaction forces lower than running despite added weight
Evidence base:
- Military research on load carriage performance and injury prevention
- Walking studies show cardiovascular benefits extend to loaded walking
- Bone density research supports weight-bearing exercise
- Limited civilian rucking-specific studies, but principles well-established
- Growing popularity has increased practitioner experience and protocols
Limitations:
- Most research is military (injury-focused, heavy loads, different goals)
- Optimal load/duration/frequency for civilians not well-studied
- Long-term effects of regular rucking need more research
- Individual variation in tolerance to loaded walking
- No direct RCTs comparing rucking to other cardio modalities
Episodes
Michael Easter discusses the science and psychology of growth through discomfort and challenge. The conversation covers why modern comfort has diminished resilience and how inte...
Michael Easter, author of Walk with Weight, joins Brett McKay to explore the evolutionary and scientific case for rucking. Easter argues that humans are uniquely built to carry ...
Strength nutrition strategist and weightlifting coach Steph Gaudreau breaks down rucking specifically for women over 40 in this solo episode. She clarifies what rucking is — car...
Mike Matthews makes the case that rucking is the ultimate cardio hack for people who hate traditional cardio. He walks through the historical roots of rucking from Roman soldier...
Steph Gaudreau interviews science writer Michael Easter about the benefits of rucking, with a specific focus on why it matters for women. Easter shares how his experience packin...
Strength coach and author Josh Bryant joins Brett McKay to discuss his book Rucking Gains. Bryant first encountered rucking in high school working at a hardcore gym, then dove d...
Peter Attia sits down with Jason McCarthy, founder of GORUCK and former Green Beret, for an in-depth conversation that weaves together McCarthy's military journey with practical...
Scott Benner interviews Adam, a 41-year-old type 1 diabetic and avid rucker from Cleveland, about how rucking became a transformative fitness activity after his late-in-life dia...
Brett McKay interviews Jason McCarthy, the founder of GORUCK and a former Green Beret, about how GORUCK events build leadership, resilience, and community through shared physica...