Rucking means walking with added weight in a backpack or vest, and it does more per minute than walking alone: It raises cardiovascular demand, recruits the posterior chain, and loads the skeleton, three inputs that decline predictably with age. A loaded pack a few times a week makes the most of walking time, and it fits naturally alongside a longevity-focused routine that includes NOVOS Core.
Quick Overview
- Rucking is weighted walking, developed from military load-carriage training.
- Added load raises calorie burn, cardiovascular demand, and skeletal and muscular loading beyond walking alone.
- Most beginners start with 10 to 15 pounds and build from there.
What Is Rucking?
Rucking is walking, hiking, or marching while carrying a loaded backpack, vest, or rucksack.
Where Rucking Came From
Rucking’s origins lie in military training, where soldiers use it to build strength, endurance, and mental toughness. Rucking prepares infantry and combat troops to transport themselves, their provisions, and their gear without a vehicle.
Military troops may complete lengthy ruck marches carrying anywhere from 20 pounds to several dozen, often over rugged terrain. For civilians, rucking has become a popular fitness trend that borrows the same principles for weekly fitness routines — although without the same grueling demands of military training.
How Rucking Differs From Walking, Hiking, and Running
Rucking shares its stride and joint pattern with ordinary walking, so the research behind walking for longevity still applies. Running raises impact force at each footstrike. Rucking stays closer to a walk while raising cardiovascular and muscular demand through added weight.
The Researched Benefits of Rucking
Six mechanisms account for rucking’s effects in the body: cardiovascular demand, muscle recruitment, skeletal loading, energy expenditure, stability, and mood.
Aerobic Capacity and Cardiovascular Conditioning
Carrying load while walking raises oxygen demand well beyond an unweighted stride. A controlled biomechanics study testing backpack loads up to 40% of body weight found that mechanical work and metabolic energy expenditure both rose in step with the added load.Â
This finding suggests that a heavier pack translates directly into a harder cardiovascular effort. Sustained sessions can hold heart rate in the range associated with VO2 max and cardiovascular conditioning, without the impact of running.
Muscle Strength and the Posterior Chain
A rearward, midline load recruits the glutes, hamstrings, and spinal erectors more than an unloaded stride. Military load-carriage research has found large performance gains when progressive loading is paired with aerobic and resistance training, especially when done at least three days per week. So, pairing rucking with structured cardio and weight lifting rounds out a weekly routine.
Bone Loading and Bone Density
Bone remodels in response to mechanical strain, and carrying external load while walking is an accessible way to add that strain — again, without running’s repeated impact. A landmark trial in postmenopausal women found that a multi-year program combining vest-based loading with jumping exercise helped preserve hip bone mineral density compared with a non-exercising control group.
Energy Expenditure and Metabolic Health
Adding a pack raises calorie burn above unweighted walking at the same pace. Military research on heavier loads and rougher terrain has found the metabolic cost of carrying weight increases disproportionately as conditions get harder — beyond the roughly proportional increase seen with lighter loads on level ground.
Posture and Balance
Carrying load recruits the trunk and hips to stabilize against forward and lateral shift. It engages the same muscles that support everyday posture and balance.
Mood and Time Outdoors
Time spent walking outdoors is linked to mood benefits regardless of load. A dose-response analysis found that even short sessions improved mood and self-esteem, with much of the benefit appearing in the first several minutes.
Why Rucking Matters for Longevity
Muscle mass and bone density both decline gradually from midlife onward. The decline accelerates in the absence of a mechanical stimulus to counter it. Rucking applies load to both tissues in a single, low-equipment session. It connects to several hallmarks of aging and to what causes biological aging in muscle and bone tissue specifically.
Rucking vs. Walking: What the Load Changes
Walking alone supports cardiovascular health, with higher daily step counts linked to lower mortality risk. Rucking preserves walking’s benefits and adds a resistance and bone-loading component that unweighted walking does not provide. Rucking does place more demand on the joints, though — a tradeoff covered in more detail below.
How To Start Rucking
You don’t have to commit to a military-style routine. A simple weighted vest does the trick, ideally one that allows you to add weight as you develop strength and endurance.
Choosing a Pack and a Starting Weight
Start with roughly 10% of body weight, or about 10 to 15 pounds. The weight should be carried high and close to the back in a pack made for carrying load, rather than a standard daypack.
How Far, How Fast, and How Often
Begin with 20 to 30 minutes, two to three times per week, at a pace you can sustain while holding a conversation. Add distance before adding weight.
Form and Progression
Keep your chest lifted, and maintain a relatively normal stride. Add roughly 10% more load every two to three weeks once the current weight feels comfortable.
Risks and Who Should Take Care
The tradeoff with rucking is that load carriage increases stress on the knees, hips, and lower back. Research in recruit-aged populations has found that heavier loads change knee mechanics and raise stress-fracture risk. Anyone with joint disease, osteoporosis, or a back injury should get clearance from a healthcare provider first, and everyone should add weight slowly.
What the Evidence Can and Cannot Say
We’ve covered what the research supports. It’s equally important to understand what the evidence cannot yet support.
Most rucking-specific research comes from military load-carriage studies in young, fit recruits. In other words, findings on calorie burn and training adaptation do not automatically transfer to a 55-year-old rucking on the weekends.
Bone density evidence is similarly layered: A large, more recent randomized trial found that a weighted vest without added impact or resistance training was not enough on its own to preserve bone density in older adults during weight loss.Â
What worked better in that same body of research was pairing external load with resistance training and progressive overload, alongside the raw materials that bone needs to remodel — calcium, magnesium, and vitamin C are the ones behind the NOVOS Core formulation.
FAQ About Rucking
What is rucking in simple terms?
Rucking is walking with added weight in a backpack, vest, or rucksack, adapted from military training into a civilian practice.
What are the main benefits of rucking?
Rucking raises calorie burn and cardiovascular demand above unweighted walking, recruits the posterior chain, and adds mechanical load to the skeleton.
How much weight should a beginner ruck with?
Most beginners start around 10% of body weight, or roughly 10 to 15 pounds, and add load gradually.
Is rucking better than walking?
Rucking keeps every benefit of walking and adds resistance and bone-loading that walking alone does not provide, at the cost of more joint demand.
Does rucking build bone density?
Bone responds to mechanical strain, and load-bearing exercise is linked to better bone outcomes in several studies, including in postmenopausal women who used vest-based loading over several years.
How often should you ruck?
Two to three sessions per week, with rest or lighter walking days between, gives joints and connective tissue time to adapt.
Is rucking bad for your knees or back?
Heavier loads increase stress on the knees, hips, and lower back, so anyone with joint issues, osteoporosis, or a back injury should start light and check with a healthcare provider first.
How long does it take to see results from rucking?
Cardiovascular and strength improvements have been found in as little as four weeks of structured training, although results vary by individual.
