Is rucking worth it, or just a backpack tax

Rucking is mostly worth it, with one big asterisk. Strapping a loaded pack to your back genuinely raises the cardio and energy cost of walking, so it's a real upgrade if your "exercise" is currently a flat stroll round the block. But the louder claim doing the rounds, that rucking replaces lifting weights, is wrong. A heavy pack does not build muscle the way progressive resistance training does, and the gains flatten fast if you never add load or distance. Useful tool, oversold as a strength substitute.

Here's the honest version of who should bother, who's about to waste money on gear, and how to start without wrecking your knees.

What the load actually does to your body

The case for rucking is simple physics. Carry extra weight and your body has to spend more energy moving it. In a 2024 study in Medicine & Science in Sports & Exercise, twenty active adults walked on a treadmill with vest loads from zero up to 66% of body mass across a range of speeds. Adding load raised oxygen uptake by an average of 20% and heart rate by about 10% relative to walking unloaded (Looney et al., 2024).

That's the whole pitch in one number. A 30-minute walk that nudges you into a higher heart-rate zone is doing more cardiovascular work than the same walk empty-handed. For anyone whose week is mostly sitting, that's a genuine step up, and it's the kind of steady aerobic effort that overlaps neatly with zone 2 cardio.

The effect scales with how much you carry and how fast you go. Older load-carriage research found the energy cost of walking with a pack climbs with load mass, body mass, walking speed and gradient, and that carrying the weight close to your centre of gravity is the most efficient way to do it (Quesada et al., reviewed in Ergonomics, 1992). That last point matters: a snug, high-riding pack taxes you less than a sloppy low one, which is partly why a dedicated ruck plate sits better than a school backpack stuffed with books.

The "just walking with extra steps" dismissal is wrong

The sceptic's line is that rucking is walking cosplaying as training. The data says otherwise. A 20% jump in oxygen uptake is not a rounding error. It's the difference between an easy walk and an effort that actually challenges your cardiorespiratory system, without the joint pounding of running.

That joint-friendly part is the underrated bit for anyone in their 40s and beyond. Rucking keeps you walking, an action your body already knows, while raising the intensity through load rather than impact. If running aggravates your knees but a flat walk no longer raises a sweat, a pack bridges the gap. Pair it with one of Singapore's better walking and running routes and you've got a repeatable session that doesn't need a gym.

It also does more than a bare step count. We've written before about what 10,000 steps really does, and the short version is that steps are great for general activity but light on intensity. Load is the lever that turns ordinary steps into something closer to a workout.

Where the hype falls apart: it isn't strength training

This is the bit the marketing skips. Carrying weight is not the same as lifting it, and rucking will not build muscle the way structured resistance training does.

The 2026 American College of Sports Medicine position stand on resistance training, drawn from 137 systematic reviews and more than 30,000 participants, is clear that meaningful strength and muscle gains come from training major muscle groups at least twice a week, with strength work using heavier loads for low repetitions (ACSM, 2026). A pack on a flat walk doesn't deliver that stimulus. Your legs do steady, submaximal work for an hour, which builds endurance and cardiovascular fitness, not the high-tension, near-maximal loading that drives muscle growth.

It also plateaus. The principle of progressive overload says your body adapts to a fixed stress and stops changing. Ruck the same 8kg over the same 5km every week and your fitness will improve for a while, then stall. To keep gaining you have to keep nudging the load or the distance up, which is exactly the progression most casual ruckers never do. The pack is a starting point, not a self-updating programme.

So the muscle-after-40 argument, which is real and important, points toward lifting, not rucking. Rucking is a fine complement to a strength programme. It is not a replacement for one.

What about bone density

Here's where the longevity crowd gets ahead of the evidence. The idea that a weighted pack loads your skeleton enough to preserve bone is intuitive, and it's been tested directly.

In a 2025 randomised clinical trial published in JAMA Network Open, 150 older adults losing roughly 10% of their body weight were assigned to weight loss alone, weight loss plus a weighted vest, or weight loss plus resistance training. All three groups lost similar amounts of hip bone density over 12 months, and the vest was no better than weight loss alone at protecting it (Lyles et al., 2025). A weighted vest worn during weight loss did not prevent bone loss.

A secondary analysis hinted that people who spent more time actually upright and moving in the vest fared slightly better, which fits the broader picture: it's the loading from movement, not owning the vest, that might matter. But the headline finding is a useful corrective. If bone health is your goal, the evidence behind heavy resistance training is far stronger than the evidence behind strapping on a pack.

The verdict, and the gear trap

Rucking helps if you're a walker who wants more cardiovascular return without taking up running, if you like training outdoors, or if you want to bridge from sedentary toward something harder. It's cheap, low-skill and easy to keep up, and consistency is most of the game.

You're probably wasting money if you're buying a specialist ruck plate, branded pack and weighted-vest set on the promise that it replaces the gym. It doesn't. National guidance is unambiguous that adults need both: the CDC recommends 150 minutes of moderate aerobic activity a week plus muscle-strengthening work on at least two days, covering all the major muscle groups (CDC, 2024). Rucking can cover a chunk of the first column. It does almost nothing for the second.

On dosing, start light. A common, sensible entry point in the load-carriage literature is a small fraction of body weight, in the region of 5% to 10%, before adding more. That keeps the stress on your back, hips and knees manageable while your tissues adapt. If you have a history of back, hip or knee problems, or osteoporosis, this matters more, not less.

FAQ

Is rucking worth it?

Yes as a joint-friendly cardio upgrade over plain walking if you will actually do it. No as a replacement for lifting weights.

How much weight should I start with?

Many load-carriage guides suggest starting around 5 to 10 percent of body weight before adding more. Build slowly if you have back or knee history.

Does rucking build muscle?

It builds endurance, not the high-tension loading that drives hypertrophy. Keep lifting for muscle.

Rucking or running in Singapore?

Rucking raises heart rate with less impact than running. Useful if heat and joints make running hard to sustain.

Do I need expensive ruck gear?

A snug pack with weight close to your centre of gravity matters more than branding. Start light before buying specialist plates.

Sources

• Looney DP et al. Metabolic Costs of Walking with Weighted Vests. Medicine & Science in Sports & Exercise, 2024;56(6):1177-1185
• The metabolic cost of backpack and shoulder load carriage. Ergonomics, 1992 (PubMed)
• American College of Sports Medicine. Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults, 2026 position stand
• Weighted Vest Use or Resistance Exercise to Offset Weight Loss-Associated Bone Loss in Older Adults: A Randomized Clinical Trial. JAMA Network Open, 2025 (PMC)
• Centers for Disease Control and Prevention. Adult Activity: An Overview (Physical Activity Guidelines), 2024