I recently engaged in a discussion that seems to occur regularly on the topic of kinesio tape. Namely, the “how the $*%& can that stuff work?” discussion. I’m not sure how many folks saw my reply, and at the very least, it was a different audience than might read this, so I thought I’d share here.
A good first place to start is when considering the efficacy of kinesio tape is here: http://www.npr.org/…hp?storyId=128795325
I know we try to avoid it as endurance athletes, but I know a lot of people *have* lifted weights before. One interesting phenomenon is that many – if not all lifters – lift more with a spotter. Now, this is a difficult thing to really quantify, because people also tend to take more risks with a spotter, but what many folks talk about is how they can lift more with a spotter who touches them – say hands on forearms for bench press – than with a spotter who is simply there. There’s actually a very, very significant amount of scientific research behind the impact of “touch.” Most, if not all, of the research revolves around human touch (like in that article). But some of it is pretty astounding. While kinesiotape is not human touch, it is nevertheless stimulating the same pressure-sensitive nerves in your skin. The tape is touching your skin. It pulls your skin as you move. It’s very clearly “present.” Speaking from experience, even though I *know* – intuitively – that the tape offers NO support whatsoever, it *feels* like it offers support, and that seems to have a noticeable effect on the body’s pain response. This is also why kinesiotape often does NOT work. Very often the pain response cannot be influenced by touch. Think of a broken bone. But, in genera, a LOT of pain – especially soft tissue injuries – are the body responding to something. I.e., pain is a nerve signal, and your body can choose process it a certain way. And kinesiotape seems to sort of rely on on “tricking” the body – which is why I’d never advocate kinesiotape long term. It’s a temporary solution – in my case, it allowed me (I *believe*) to be more effective in rehab exercises because I didn’t feel pain limiting me.
That’s one THEORY – that kinesiotape works through stimulus of the nerves and pressure receptors in your skin, which – for whatever reason – seems to have a positive effect on the body – reduction of stress, which of course is very closely tied to inflammation, pain, etc.
Another THEORY – the one that prevailed for a long time until some of the research on touch started to come out – is related to proprioception. Imagine running on a treadmill in a mirror. In my own experience, you tend to run better, because you can visually see what is happening. You brain has additional information available to it which helps process actions. I.e., if you change your footstrike, you can see what you’ve changed. You can see your posture. Another example of proprioception is – to some extent – swimming with paddles. Yes, big paddles enhance pulling surface, but “finger” or “catch” paddles are also very effective tools, and a big part of why is that they magnify the body’s awareness of where the hand is in the water. The theory is that kinesiotape worked in a similar way. If you have this tight tape crisscrossing a joint, you are MORE aware of how that joint is moving. In the case of my knee, if my knee moved in during an exercise, i would feel the tape pulling on it in one way. If it moved out, I’d feel the tape pulling on it in another way. This added stimulus provides additional proprioception. With that additional proprioception, your body has an easier time stabilizing the joint, which means that many of the supporting muscles can relax and not unduly restrict motion in a protective reaction for fear of the joint moving past a comfortable range, because that range is more clearly defined by virtue of the added stimulation giving additional proprioceptive input.
I’m not sure that the two theories are mutually exclusive. I tend to think they may be inherently related. But those are the two prevailing theories.
As a noted pubmed fan, I regularly search for kinesio tape. There are some good studies out there. Most don’t look into “Why.” Only, “does it work.”
Here’s a sample:
http://www.ncbi.nlm.nih.gov/pubmed/19147374
The effects of taping on scapular kinematics and muscle performance in baseball players with shoulder impingement syndrome.
CONCLUSIONS: The elastic taping resulted in positive changes in scapular motion and muscle performance. The results supported its use as a treatment aid in managing shoulder impingement problems.
http://www.ncbi.nlm.nih.gov/pubmed/19574662
Short-term effects of cervical kinesio taping on pain and cervical range of motion in patients with acute whiplash injury: a randomized clinical trial.
CONCLUSIONS: Patients with acute WAD receiving an application of Kinesio Taping, applied with proper tension, exhibited statistically significant improvements immediately following application of the Kinesio Tape and at a 24-hour follow-up. However, the improvements in pain and cervical range of motion were small and may not be clinically meaningful. Future studies should investigate if Kinesio Taping provides enhanced outcomes when added to physical therapy interventions with proven efficacy or when applied over a longer period.
http://www.ncbi.nlm.nih.gov/pubmed/18591761
The clinical efficacy of kinesio tape for shoulder pain: a randomized, double-blinded, clinical trial.
CONCLUSION: KT may be of some assistance to clinicians in improving pain-free active ROM immediately after tape application for patients with shoulder pain. Utilization of KT for decreasing pain intensity or disability for young patients with suspected shoulder tendonitis/impingement is not supported.
I just picked those three at random. Notice in all cases, a statistically significant improvement was reported. The last one is most illustrative to me, because it also demonstrates when kinesiotape does NOT work – when there is an actual impingement. Kinesiotape general seems to address issues of soft-tissue inflammation. There are things it CANNOT fix. And anyone who tells you otherwise is an idiot and a liar. But there do seem to be some pretty strong indications for it’s use.
One other study, which tends to provide support for the first theory I presented, which is NOW the most accepted (the proprioceptive theory is the old one) is this one:
http://www.ncbi.nlm.nih.gov/pubmed/20537313
Relieving symptoms of meralgia paresthetica using Kinesio taping: a pilot study.
CONCLUSIONS: Kinesio taping can be used in the treatment of MP. Future randomized placebo-controlled trials should be designed with patients and assessors blind to the type of intervention.
Meralgia paresthetica is a condition characterized by tingling, numbness and burning pain in the outer part of your thigh. The cause of meralgia paresthetica is compression of the nerve that supplies sensation to the skin surface of your upper leg. (From WebMD). So what’s interesting is that it’s a nervous “problem” that is helped by the tape. Anyway, I’m sure that’s more than you wanted. But hopefully it shows that there is some good – and compelling – research that shows, at the very least, the efficacy of kinesiotape even if the exact mechanism is not yet known.
Further to the above, SpiderTech makes a “lymph” spider, which is designed along these lines. It’s a bit of a different usage, because the idea is not pain management. It’s something where I’m not sure there even *could be* a placebo effect, a common response to many of the pain-centric kinesio tape studies.
http://www.ncbi.nlm.nih.gov/pubmed/19199105
Could Kinesio tape replace the bandage in decongestive lymphatic therapy for breast-cancer-related lymphedema? A pilot study.
CONCLUSIONS: The study results suggest that K-tape could replace the bandage in DLT, and it could be an alternative choice for the breast-cancer-related lymphedema patient with poor short-stretch bandage compliance after 1-month intervention. If the intervention period was prolonged, we might get different conclusion. Moreover, these two treatment protocols are inefficient and cost time in application. More efficient treatment protocol is needed for clinical practice.
It’s a less conclusive study, but an interesting one nonetheless. What is most interesting, to me, is that it largely operates outside any of the perceived mechanisms that I explained for how kinesiotape works other than to say that it has “an” effect on the nervous system which then plays a role in how nerves control muscles.
It’s, as the study suggests, a pilot. And the results are not overwhelming. But it’s interesting that there results are positive, and I think that’s something that would suggest – to me anyway – that there is something more than “placebo” going on when tape is used. I think this study is the most on the fringe of potential benefits, which is why the conclusions are not very concrete. But I think that perhaps more research along THIS sort of line might be easier to rely on eliminate the placebo effect because, as you note, doing a double-blind trial is very hard. There’s no “placebo tape” equivalent. At least, not yet.
What I also found interesting is that there was ONE double-blind, randomized trial on pubmed that also shows the same results for shoulder pain – no benefit for an impingement, but benefits for those without impingement.
http://www.ncbi.nlm.nih.gov/pubmed/18591761
STUDY DESIGN: Prospective, randomized, double-blinded, clinical trial using a repeated-measures design.
OBJECTIVES: To determine the short-term clinical efficacy of Kinesio Tape (KT) when applied to college students with shoulder pain, as compared to a sham tape application.
BACKGROUND: Tape is commonly used as an adjunct for treatment and prevention of musculoskeletal injuries. A majority of tape applications that are reported in the literature involve nonstretch tape. The KT method has gained significant popularity in recent years, but there is a paucity of evidence on its use.
METHODS AND MEASURES: Forty-two subjects clinically diagnosed with rotator cuff tendonitis/impingement were randomly assigned to 1 of 2 groups: therapeutic KT group or sham KT group. Subjects wore the tape for 2 consecutive 3-day intervals. Self-reported pain and disability and pain-free active ranges of motion (ROM) were measured at multiple intervals to assess for differences between groups.
RESULTS: The therapeutic KT group showed immediate improvement in pain-free shoulder abduction (mean +/- SD increase, 16.9 degrees +/- 23.2 degrees ; P = .005) after tape application. No other differences between groups regarding ROM, pain, or disability scores at any time interval were found.
CONCLUSION: KT may be of some assistance to clinicians in improving pain-free active ROM immediately after tape application for patients with shoulder pain. Utilization of KT for decreasing pain intensity or disability for young patients with suspected shoulder tendonitis/impingement is not supported.
Hope that helps for folks that wonder about the science involved.