Rucking — walking with a weighted backpack — has moved from a military training staple into mainstream fitness circles, and the appeal makes sense: it combines cardio and resistance training into one low-impact activity that requires nothing more than a backpack and some weight.
Why Rucking Works
Adding load to walking increases energy expenditure meaningfully compared with walking at the same pace unweighted — research has found rucking can burn roughly 2-3 times more calories than regular walking at a similar pace, depending on load and speed. It also engages the posterior chain (back, glutes, core) more than flat walking, since the body has to stabilize against the added weight, particularly if carried in a proper rucksack positioned high and close to the back.
Why It’s Easier on Joints Than Running
Rucking is a lower-impact alternative to running for building cardiovascular fitness, since walking (even weighted) doesn’t involve the repeated high-impact landing forces that running does. This makes it an appealing option for people managing joint issues, returning from injury, or simply looking for effective low-impact cardio that still provides a meaningful training stimulus.
Getting Started Safely
- Starting load: a common beginner guideline is roughly 10% of body weight, progressing gradually as fitness and comfort improve
- Pack setup: use a proper rucksack or weighted vest rather than an unbalanced backpack, positioned high and snug against the back to avoid strain
- Starting distance/duration: 20-30 minutes at an easy pace is a reasonable starting point, building up distance before adding significant additional weight
- Footwear: supportive footwear matters more with added load, since the extra weight increases stress on feet and ankles
How to Choose the Right Rucksack and Load It Properly
Not every backpack is suited to carrying weight for miles at a time. A rucksack built for rucking, or a sturdy hiking pack, distributes weight through a padded hip belt and shoulder straps rather than letting it hang loosely off the shoulders, which matters once you’re carrying more than 10-15 pounds for an extended walk. A pack that shifts or bounces with each step not only feels worse but forces stabilizing muscles to work harder in ways that can strain the lower back rather than build it, especially for beginners.
How you load the pack matters almost as much as the pack itself. Placing the weight high, close to the shoulder blades, and centered rather than to one side keeps the load near your body’s center of gravity and reduces the leverage it exerts on your spine. Dedicated ruck plates wrapped in a plate carrier or a rucking-specific insert keep weight from shifting during the walk, while loose items like books or sandbags tend to move around inside a generic backpack, which is a common reason first-time ruckers find the activity more uncomfortable than it needs to be.
How Often to Ruck for Steady Progress
Because rucking is lower-impact than running, many people can tolerate it more often per week without the recovery penalty that comes with high-mileage running. Two to three sessions a week is a common starting cadence for building a base, with rest days or lighter unweighted walks in between while the body adapts to carrying load repeatedly. As with any new form of load-bearing exercise, soreness in the shoulders, hips, and lower back in the first couple of weeks is normal, but sharp or persistent joint pain is not, and is a signal to reduce the weight or distance rather than push through it.
Progression tends to work best along one variable at a time: increasing distance while keeping weight steady, or increasing weight while keeping distance steady, rather than pushing both at once. A common guideline is to add weight or distance gradually, for example in five to ten percent increments, once a given combination feels comfortable rather than difficult, which keeps the risk of overuse injury low while still building meaningful cardiovascular and muscular fitness over a period of weeks and months.
Frequently Asked Questions
Can rucking replace strength training? It provides some resistance benefit, particularly for the posterior chain and legs, but it’s not a full substitute for dedicated strength training targeting all major muscle groups.
Is rucking safe for people with back issues? Proper load placement and starting conservatively matters a lot here; anyone with existing back problems should check with a healthcare provider or physical therapist before adding significant weighted load to walking.
Why Adding Weight Changes the Exercise So Much
Rucking, walking while carrying a weighted pack, originated in military training but has gained mainstream fitness attention because it addresses a real gap between walking and running: walking alone is excellent for low-impact cardiovascular health but produces relatively modest calorie burn and strength stimulus for the time invested, while running significantly increases both but comes with meaningfully higher joint impact and injury risk for many people. Adding load to walking increases the metabolic and muscular demand substantially, research comparing rucking to unloaded walking at the same pace has found notably higher calorie expenditure and heart rate response, often approaching or exceeding jogging-level energy expenditure while maintaining the lower per-step impact forces of walking rather than running.
Beyond cardiovascular demand, the added load engages postural and stabilizing muscles, the core, upper back, shoulders, and legs, that unloaded walking barely challenges, giving rucking a combined cardio-and-strength training effect that’s relatively unique among common low-impact activities.
Getting Started Safely
The most common mistake beginners make is starting with too much weight too soon, a mistake that increases injury risk to the back, shoulders, and joints without proportionally increasing benefit. General guidance suggests starting with a relatively light load, often cited as around 10% of body weight or less for true beginners, and progressing gradually over weeks as your body adapts to both the load and the movement pattern, rather than jumping to loads seasoned ruckers or military-style programs use. A properly fitted rucksack, one that distributes weight close to your back and doesn’t shift excessively during movement, matters considerably for both comfort and injury prevention, a poorly fitted pack can create uneven loading that stresses the spine and shoulders asymmetrically.
Posture also matters more with added load than during regular walking, maintaining an upright position rather than leaning forward to compensate for the weight helps distribute the load appropriately and reduces unnecessary strain on the lower back.
Who Should Be Cautious
Rucking places genuine additional stress on joints, particularly the knees, hips, and spine, and on the cardiovascular system compared to unloaded walking, which means people with existing back problems, joint issues, or cardiovascular conditions should approach it more cautiously and may want guidance from a doctor or physical therapist before adding significant load, rather than assuming it carries the same low-risk profile as ordinary walking. For generally healthy adults looking for an accessible way to increase the intensity and benefit of their walks without transitioning to running, rucking is a reasonable, well-supported option when approached with sensible weight progression and attention to form.
Sources
- American College of Sports Medicine — Load Carriage and Energy Expenditure Research
- U.S. Army — Load Carriage Physical Training Guidance
- American College of Sports Medicine
Final Thoughts
Rucking is a simple, accessible way to add resistance to a low-impact cardio activity most people already do. Starting with a modest load and building up gradually gets most of the benefit with minimal injury risk.
This article is for general educational purposes and is not a substitute for personalized medical or fitness advice.
About the Author
This article was written and reviewed by Ethan Brooks, focused on translating public health information into clear, practical guidance for everyday readers. If you spot an error or have a correction, please contact us.