How Often Should You Train with a Heavy Rucksack? Training Frequency for Rucking and Tabbing.
- Alastair Hunt
- 18 hours ago
- 4 min read
If you're preparing for a military selection course, a charity challenge or simply want to improve your ability to carry heavy loads, one question often comes up: how frequently should you train with a loaded rucksack? A 2021 review examined research on soldier load carriage, bringing together evidence on injuries, recovery and conditioning to answer exactly that. Rather than reporting the results of a single study, the paper reviews decades of international research to identify practical ways to improve performance while reducing injury risk.
As ever, please talk to your doctor or medical practitioner most familiar with your medical history before implementing any changes in diet, exercise or lifestyle, especially if you are under treatment. Links to all studies at bottom of page.
What Makes Rucking Hard & How To Succeed
The review explains why carrying heavy loads is so physically demanding. Adding weight increases the body's energy requirements, alters posture and walking mechanics, and raises the forces travelling through the feet, legs and spine. As fatigue builds, these changes become more pronounced, increasing the likelihood of overuse injuries.
Common problems include stress fractures, lower back pain and nerve compression injuries caused by prolonged pressure from equipment. One of the most important findings is that a previous injury is one of the strongest predictors of a future one. For that reason, the authors devote considerable attention to rehabilitation and safe reconditioning rather than simply describing injury rates.
Perhaps the paper's most practical recommendation concerns training frequency. The evidence suggests that dedicated loaded marching sessions should be performed no more than once every 10 to 14 days. While carrying a load at least once every seven to 14 days helps maintain the specific adaptations required for rucking, increasing sessions beyond four per month does not appear to improve performance and instead raises injury risk. This finding challenges the common belief that more frequent rucking automatically leads to better results. According to the review, there is a point where additional training creates more fatigue than meaningful adaptation.
Recovery is one reason for this recommendation. Following a heavy loaded march, neuromuscular recovery in the trunk and lower limbs can take between 48 and 72 hours. Repeating demanding sessions before the body has fully recovered may simply accumulate fatigue rather than build fitness.
The review also makes clear that successful load carriage preparation depends on more than simply wearing a heavy backpack. The best programmes combine specific ruck sessions with regular resistance training and aerobic exercise. Together, these improve strength, endurance and overall carrying capacity while reducing the need for frequent heavy load exposure. Interestingly, upper body relative strength appears to have a stronger relationship with loaded marching performance than lower body strength. This highlights the importance of developing the shoulders, upper back and trunk, which work continuously to stabilise both the body and the pack. Strong legs remain essential, but neglecting the upper body may limit performance and increase fatigue.
Another useful takeaway is that increasing training intensity does not have to mean adding more weight. The review suggests manipulating walking speed, terrain or hill gradients instead. In fact, a one per cent increase in incline raises energy cost by roughly ten times more than a one per cent increase in carried load. This makes hills and uneven terrain an effective way to increase the training stimulus without continually loading the body with heavier packs.
A Hidden Factor
The authors also introduce the concept of Program-Induced Cumulative Overload. This recognises that total daily activity contributes to fatigue, not just structured exercise. Soldiers may accumulate seven to eleven kilometres of walking each day through routine duties before completing any formal training. Although most recreational athletes are unlikely to match this, the same principle applies to anyone with a physically demanding job or active lifestyle.
Time spent walking, standing, lifting or climbing stairs all contributes to the body's overall workload and should be considered when planning recovery.
Practical Recommendations
For most people training for a loaded march event, the evidence supports completing one dedicated heavy ruck every 10 to 14 days. Between these sessions, build fitness through resistance training and aerobic exercise rather than frequent heavy carries.
Pay particular attention to strengthening the upper back, shoulders and trunk alongside the legs, and increase training difficulty by adjusting pace or terrain before automatically adding more weight to your pack. Finally, remember that your recovery depends on your total physical workload, including work, daily walking and other exercise, not just your scheduled ruck sessions.
If you are training for the PARAS'10, a Norwegian Foot March, or just to get fast and fit, our self-paced online course"Built to Ruck The Science and Practice of Rucking" covers everything the research tells us about load carriage training, pacing, progression, heat management, hydration, fueling and more. It is built for ruckers at every level of experience, and draws directly on the peer-reviewed military and sports science research.
Final Thoughts
This review suggests that successful load carriage training is built on quality rather than quantity. Heavy rucking undoubtedly places considerable stress on the body, but more frequent sessions do not necessarily improve performance and may increase injury risk. Instead, spacing heavy loaded marches around every 10 to 14 days, supporting them with strength and aerobic training, and allowing adequate recovery appears to provide the safest and most effective route to long-term progress.
Wherever you are: train safe and enjoy the process!
Alastair
Key Studies
Orr R, Pope R, Lopes TJA, Leyk D, Blacker S, Bustillo-Aguirre BS, Knapik JJ. Soldier Load Carriage, Injuries, Rehabilitation and Physical Conditioning: An International Approach. Int J Environ Res Public Health. 2021 Apr 11;18(8):4010. doi: 10.3390/ijerph18084010. PMID: 33920426; PMCID: PMC8069713.
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