How Much Compression Boot is Too Much Compression Boot?

There’s a guy – let’s call him John Doe – whose latest training obsession has his wife deeply concerned. We all know a guy like John: a passionate 50-something triathlete who trains religiously, skips too many rest days, and believes his hot tub is the ultimate recovery tool.

Recently, John purchased compression boots from Costco after reading a glowing review in Triathlete. He’d previously tried deluxe models from several leading brands and loved the way they squeezed and soothed his aching muscles after a tough ride or run, but he’d always balked at the $800 (and up) price tag. Thanks to Costco, though, he could now enjoy the basic benefits of intermittent pneumatic compression (or IPC, the technical term) for only $130.

Fast-forward a few weeks, and Jane, the proverbial long-suffering triathlon wife, is worried that he’s spending too much time cocooned in his Costco boots. At first, John just used them for the recommended 20-30 minutes post-workout. But the massaging action felt so good that he was soon wearing them while he worked, watched race replays, and sat on his couch micro-analyzing his normalized power graphs.

The tipping point came when Jane discovered that her husband was regularly indulging in more than two hours of squeezing while she was away at the office. There was clearly a dependency forming, but even more troubling was the potential for physical damage. Loving his lower extremities, she asked the question this article intends to answer: Can an everyday athlete harm himself by wearing his compression boots too much?

What you need to know about compression boots

Originally developed as medical devices for patients with poor circulation or insufficient lymphatic drainage, compression boots are inflatable sleeves that fit over the legs and connect to a small air compressor. The models marketed to the general public typically feature multiple chambers that inflate gradually and/or sequentially from the feet up to the thighs, with adjustable pressure levels. Deluxe models, like Hyperice’s Normatec Elite Legs and Therabody’s Jet PRO Plus, may add heating or cooling elements as well as customizable settings.

IPC brands and ambassadors tout a range of therapeutic and performance benefits stemming from the increased blood flow caused by the massaging action. Here’s how it works, in theory: You hammer through a 15-mile training run, causing numerous microtears in your leg muscles. This is normal, and your body immediately begins to repair the damage, ideally building the muscles back stronger.

But the workout and repair process lead to fluid buildup in your cells, which will cause discomfort and stiffness. So you slip into the boots and dial up 30 minutes at your preferred intensity. As you scold yourself for running the first five miles at Z4, the compression physically forces the fluids from your cells into your bloodstream, where the metabolic waste is carried away to be removed by your lymph nodes.

According to claims from compression boot manufacturers, this process reduces post-workout swelling, speeding your recovery and reducing DOMS (the delayed onset muscle soreness you know as “Jeez, going down stairs hurts a lot more two days later”).

If the claims are to be believed, using compression boots will shorten downtime, improve performance during subsequent workouts, and lessen the risk of injury. Voilà! Fewer aches and a speedier path to consolidating those hard-earned gains!

Do compression boots actually work?

To date, there’s no clear scientific consensus that the above-mentioned benefits are real. The handful of studies evaluating the impact of IPCs on recovery and performance have yielded mixed results.

Hyperice, maker of the popular Normatec line of compression products, sums it up this way: “While the evidence supporting compression boots is strong in some areas, it is not unanimous. Many studies highlight positive short-term outcomes, particularly reduced soreness and fatigue perception. Athletes often report feeling more ‘ready’ to train again, which in itself is valuable. However, the long-term impact on objective performance outcomes such as sprint speed, strength, or endurance remains less clear.”

Dr. Jeffrey Sankoff, Triathlete contributor and voice of the TriDoc Podcast and a longtime coach, has reviewed the literature on his show and reports frequently on recovery science. He echoes this ambiguity, telling Triathlete: “There’s no evidence that compression boots actually do anything in terms of recovery and performance. But they do make you feel better, and there is real merit to that. They also make you sit still, which is beneficial, because we’re really bad at just resting.”

As a coach, Sankoff encourages his athletes to engage in active recovery, but he also appreciates the convenience of this type of passive recovery. If you can afford the boots, he says, it’s better to wear them while multitasking than to do nothing at all.

When your compression boots hurt more than heal

When presented with Jane’s question of how much compression boot is too much compression boot, Sankoff shakes his head, amused and slightly aghast at John’s craving for compression. But he offers immediate reassurance that John is highly, highly unlikely to injure himself.

“The force being generated by these boots is generally insufficient to cause significant tissue breakdown,” says Sankoff. “We know that intense, sustained pressure can cause rhabdomyolysis or breakdown of muscle, but two to three hours is probably too short, especially in boots that are constantly filling and releasing.”

Besides, he notes, the body would send sharp distress signals if real damage was being done, namely, intense pain or numbness. While mild discomfort is normal during massage or compression, actual pain is a clear warning to back off right away. And numbness is even more concerning, a sign of bigger problems: “It means there’s swelling in the muscles that’s compromising the nerves.”

Sankoff’s insights align with the IPC usage guidelines widely shared by manufacturers and physicians, which are pretty simple:

• Start with 20-30 minutes at the lowest pressure setting, increasing duration and intensity as you become comfortable with the boots.
• For the best results, select a sequence that starts at the feet and moves toward the hips. (And don’t forget to hydrate.)
• Consult your doctor before using boots or sleeves if you have vascular issues, heart problems, neuropathy, open sores or skin conditions, or a baby in the belly.
• Avoid use if you’ve recently sustained a fracture or severe sprain.
• Discontinue immediately if you develop numbness, pain, or skin irritation.

All of which suggests that our John Doe, a healthy age-group triathlete, can keep compressing to his heart’s delight. At some point, he may need to explore recovery programs to address his recovery habit, but for now, the only apparent downside to this peculiar addiction may be marital discord. Especially if I (I mean, he) starts wearing them to bed.