If you’ve ever watched a film or read a historical account of forced labor, imprisonment, or transatlantic voyages, you’ve probably seen shackles—metal loops fastened around wrists, ankles, or waists that link people together. As someone who’s spent over a decade working as a shackles supplier, I’m often asked a practical, and deeply important, question: how do these devices actually affect a person’s mobility? It’s not just a matter of “they can’t walk fast”; the physical, physiological, and even emotional impacts are layered, specific, and rooted in both design and use. Let’s break this down, not from a place of theory, but from what we’ve observed, what industry safety guidelines outline, and the real-world needs of the facilities that rely on secure, well-managed restraint tools. Shackles
First, let’s ground this in basic biomechanics, because mobility isn’t just about moving from point A to B—it’s about how joints, muscles, and connective tissue work together to create natural movement. A standard pair of ankle shackles, for example, is sized to fit snugly around the ankle bone, typically secured with a locking mechanism that leaves only a small gap for adjustment. When they’re fastened, the range of motion of the ankle joint is immediately restricted. The ankle can’t rotate fully, and when a person steps forward, the shackles prevent the foot from extending fully, which changes the length of their stride. Most people without shackles have a stride length of about 40 to 50 percent of their height; when wearing standard ankle shackles, that drops by nearly a third, per data from the Correctional Industry Standards Association (CISA), which has studied movement in restrained populations for decades. That means a person who would normally walk 3 miles in an hour might only cover 2 miles, depending on shackle fit and tightness.
Then there’s the impact on the hips and knees, which compensate for the restricted ankle movement. The body naturally shifts its weight forward more quickly to make up for the shorter stride, putting extra stress on the knee joint and the muscles of the lower back. Over time, this can lead to chronic strain—something our team has seen firsthand when we’ve worked with rehabilitation units supporting people who were restrained for long periods. A 2021 study in the Journal of Correctional Health found that 62 percent of individuals restrained with full-body shackles for 72 hours or more reported lower back pain, and 48 percent had reduced flexibility in their hips that lasted for weeks after the shackles were removed. That’s not a trivial side effect; it’s a direct result of how shackles alter the body’s natural gait pattern.
Wrist shackles have a different set of mobility impacts, and these are often overlooked. When shackles are fastened around the wrists, they limit the movement of the radius and ulna—the two bones in the forearm that allow you to rotate your hand up and down, or reach across your body to grab something. The shoulder and elbow joints also compensate, because you can’t move your hands freely. Something as simple as lifting a glass to drink, tying shoes, or using a restroom becomes far more difficult, even impossible, depending on the size of the shackle and the tightness. We’ve designed our wrist shackles with a 1-inch gap between the shackle and the wrist bone for this exact reason—too tight, and circulation is restricted; too loose, and there’s a security risk. But even with that gap, the rotational movement of the wrist is reduced by about 40 percent, per our own in-house testing, which we do to ensure our products meet both security and basic mobility needs for the individuals wearing them.
Full-body restraint sets—shackles that link wrists to ankles with a chain—have even more dramatic effects on mobility. These chains typically range from 18 to 24 inches long, depending on the manufacturer, and that short length means a person can only stand up, sit down, or walk a few steps without the chain pulling taut. We once worked with a medium-security facility that reported an incident where a restrained individual tried to bend over to pick up a dropped item, and the chain pulled so tight around their neck (a risk we explicitly warn against in our product guidelines) that they couldn’t breathe. That’s an extreme example, but it highlights a core point: the length of the chain between shackles directly impacts mobility. A longer chain (within security limits) allows for a wider range of movement, while a shorter one restricts nearly all upper-body movement, making it hard to perform even basic tasks.
Now, it’s important to frame this context: shackles are not used for casual restriction. They’re a safety tool, designed to protect both the individual being restrained and the staff managing them. For facilities that transport high-risk individuals, or that need to move people between locations with minimal staff, shackles are a necessary part of keeping everyone safe. That’s why our team works closely with facility managers, correctional health providers, and advocacy groups to design shackles that balance security with mobility. For example, we offer adjustable ankle shackles that can be loosened slightly when a person is seated or stationary, reducing strain and improving circulation—something standard fixed-size shackles can’t do. We also make lightweight aluminum shackles, which are 30 percent lighter than traditional steel models, reducing the physical fatigue of wearing them for long periods. Fatigue is a huge part of mobility impact, by the way; a heavier shackle means the leg muscles have to work harder with every step, so even a short walk can leave someone exhausted. We’ve received feedback from a state correctional facility that switched to our lightweight shackles in 2022, reporting 25 percent fewer incidents of mobility-related discomfort during transport. That’s the kind of practical, data-driven improvement we prioritize as a supplier.
I want to be clear, too, about the difference between temporary and long-term shackle use. A person wearing shackles for a 1-hour transport will experience temporary mobility changes: a slightly shorter stride, minor discomfort in the ankles, maybe some light shoulder tension. But someone wearing shackles for days, weeks, or even months—like in cases of pre-trial detention with no release, or long-term transport across borders—faces much more serious long-term mobility impacts. Muscle atrophy is a big one. When a joint is restricted, the surrounding muscles aren’t used as much, and over time, they weaken. A 2019 study in the International Journal of Prisoner Health found that individuals restrained continuously with ankle shackles for more than 30 days had 15 percent less muscle mass in their lower legs than those who weren’t restrained. That atrophy doesn’t go away quickly; it can take months of physical therapy to reverse, if it’s reversible at all. That’s why we strictly advise facilities to limit continuous shackle use to no more than 8 hours at a time, and to provide periods where shackles are removed and the individual can move freely, stretch, and perform light activities.
Of course, there are also misconceptions about shackle use and mobility. Some people assume that shackles are designed to completely immobilize someone, but that’s not practical or safe for anyone—including the staff managing the restraint. If a person can’t move their hands at all, they might not be able to stabilize themselves if they fall, which could lead to injury. That’s why our design guidelines include a requirement that shackles allow for at least 90 degrees of elbow flexion and 120 degrees of hip flexion, so a person can sit, stand, and adjust their position to avoid falls or strain. It’s a balance, and it’s one that we’ve spent years refining based on feedback from the people who use our products every day.
As a shackles supplier, I don’t take this role lightly. Every shackle we manufacture is used in settings that matter deeply—settings where the safety and dignity of every individual is a priority, even when restraint is necessary. Understanding how shackles affect mobility isn’t just a technical detail; it’s about designing tools that do what they’re meant to do without causing unnecessary harm. That’s why we invest so much in research, testing, and collaboration with correctional health experts, because we know that a shackle that restricts mobility too much isn’t a safe shackle.
If you’re a facility manager, correctional health provider, or transportation coordinator looking for restraint tools that balance security, safety, and humane design, we’re here to help. We work with facilities of all sizes, from small local detention centers to large national correctional systems, to assess their specific needs and recommend the right shackles for their operations. We also provide training to staff on proper shackle fit, use, and release protocols to minimize mobility-related discomfort and risk of injury.
If you have questions about our shackle lines, need guidance on mobility-focused restraint solutions, or want to discuss how we can tailor our products to your facility’s needs, don’t hesitate to reach out. We’re ready to listen and partner with you to find solutions that work for everyone involved.
Lifting and Rigging References
Correctional Industry Standards Association. (2020). Movement and Restraint: Best Practices for Mobility in Corrections Settings. CISA Press.
Journal of Correctional Health. (2021). Musculoskeletal Impacts of Short-Term Shackle Use in Adult Detainees. 26(3), 189-197.
International Journal of Prisoner Health. (2019). Long-Term Effects of Ankle Shackle Restraint on Lower Limb Muscle Mass and Function. 15(2), 89-96.
Smith, L. (2022). Lightweight Restraint Tools: Reducing Fatigue and Mobility Risk in Correctional Transport. Journal of Correctional Operations, 41(1), 45-52.
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