Manual Therapy xxx (2013) 1e5

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Manual Therapy
journal homepage: www.elsevier.com/math

Original article

Short term effects of kinesiotaping on acromiohumeral distance in

asymptomatic subjects: A randomised controlled trial
A. Luque-Suarez a, *, S. Navarro-Ledesma a, P. Petocz b, M.J. Hancock c, J. Hush c
a
Physiotherapy Department, University of Malaga, Malaga, Spain
b
Department of Statistics, Macquarie University, Sydney, Australia
c
Department of Health Professions, Faculty of Human Sciences, Macquarie University, Sydney, Australia

a r t i c l e i n f o a b s t r a c t

Article history: Objectives: The first aim of this study was to investigate whether kinesiotaping (KT) can increase the
Received 30 July 2012 acromiohumeral distance (AHD) in asymptomatic subjects in the short term. The second aim was to
Received in revised form investigate whether the direction of kinesiotaping application influences AHD.
3 June 2013
Background: In recent years, the use of KT has become increasingly popular for a range of musculoskeletal
Accepted 7 June 2013
conditions and for sport injuries. To date, we are unaware of any research investigating the effect of
kinesiotaping on AHD. Moreover, it is unknown whether the direction of kinesiotaping application for
Keywords:
the shoulder is important.
Shoulder
Rehabilitation
Methods: Forty nine participants were randomly assigned to one of three groups: kinesiotaping group 1
Shoulder impingement syndrome (KT1), kinesiotaping group 2 (KT2) and sham kinesiotaping (KT3). AHD ultrasound measurements at
0
and 60
of shoulder elevation were collected at baseline and immediately after kinesiotape
application.
Results: The results showed significant improvements in AHD after kinesiotaping, compared with sham
taping. The mean difference in AHD between KT1 and KT3 groups was 1.28 mm (95% CI: 0.55, 2.03), and
between KT2 and KT3 was 0.98 mm (95% CI: 0.23, 1.74). Comparison of KT1 and KT2 groups, which was
performed to identify whether the direction of taping influences the AHD, indicated there were no
significant differences.
Conclusion: KT increases AHD in healthy individuals immediately following application, compared with
sham kinesiotape. No differences were found with respect to the direction in which KT was applied.
Ó 2013 Elsevier Ltd. All rights reserved.

1. Background active rehabilitation for shoulder impingement (Desmeules et al.,

2004) or surgical repair of the rotator cuff (Saupe et al., 2006). In
Maintenance of the subacromial space in the shoulder girdle is asymptomatic individuals, reduced AHD during shoulder abduction
crucial for normal shoulder function. The subacromial space can be correlates with scapular dyskinesia (Silva et al., 2010) and may
assessed by measurement of the acromiohumeral distance (AHD), therefore be a useful pre-symptomatic indicator of subacromial
which is the distance between the most cranial part of the humeral impingement.
head and the acromion. Reduced AHD occurs when the humeral AHD can be measured by radiography or magnetic resonance
head migrates superiorly with inadequate external rotation, and imaging (Saupe et al., 2006), although ultrasonography is a less
correlates with shoulder impingement severity (Desmeules et al., expensive tool that has additional benefits (Azzoni et al., 2004;
2004; Mayerhoefer et al., 2009; Matsuki et al., 2012) and rotator Desmeules et al., 2004). For example, real-time ultrasonography
cuff disease (Seitz and Michener, 2011). The measure of AHD can enables the radiologist to measure AHD in different degrees of
also be used to identify patients who are most likely to benefit from shoulder elevation or rotation (Michener et al., 2003). This
approach has been used to detect subacromial space narrowing in
young athletes as an early sign of shoulder impingement (Girometti
et al., 2006).
* Corresponding author. Facultad de Ciencias de la Salud, Universidad de Malaga,
In recent years, the use of a therapeutic taping technique known
Paseo de Martiricos s/n 29009 Malaga, Spain. Tel.: þ34 952137068; fax: þ34
952132913.
as kinesiotaping has become increasingly popular for a range of
E-mail address: aluques@uma.es (A. Luque-Suarez). musculoskeletal conditions and for sport injuries. For those with

1356-689X/$ e see front matter Ó 2013 Elsevier Ltd. All rights reserved.
http://dx.doi.org/10.1016/j.math.2013.06.002

Please cite this article in press as: Luque-Suarez A, et al., Short term effects of kinesiotaping on acromiohumeral distance in asymptomatic
subjects: A randomised controlled trial, Manual Therapy (2013), http://dx.doi.org/10.1016/j.math.2013.06.002
2 A. Luque-Suarez et al. / Manual Therapy xxx (2013) 1e5

rotator cuff tendinopathy and shoulder impingement, kinesiotap- Participants screened

ing has been found to improve self-reported outcomes such as pain N=62
and disability (Thelen et al., 2008; Hsu et al., 2009; Kaya et al.,
2011). However, the mechanism of action of kinesiotaping is Excluded (n=13):
currently unknown and no studies have used diagnostic imaging to Refused to participate
obtain quantitative measures of the effect of kinesiotape on the (n=11)
AHD. We hypothesize that kinesiotaping increases the AHD. Skin injuries (n=2)
The primary aim of this study was to investigate whether
Eligible
kinesiotaping can increase the AHD. We chose to examine this N=49
initially in asymptomatic subjects to investigate the mechanism of
action of kinesiotaping in the absence of pain. A secondary aim was
to investigate whether the technique of kinesiotaping application
Baseline measurements
influences any effects on the AHD.
Demographic data: age, gender, height and weight
Acromiohumeral distance (AHD) by ultrasonography in 0° and 60°
2. Method

2.1. Design: randomised controlled trial

Randomization (n=49)
2.1.1. Participants
We recruited sixty-two participants, who volunteered from the
student body of the Health Sciences School at Malaga University
(Spain), and were screened for inclusion between January and March Experimental Experimental Sham group
2012. To be included, participants had to meet all of the following group1 group2 Kinesiotaping 3
criteria: (i) no shoulder pain in the previous month, (ii) no previous Kinesiotaping 1 Kinesiotaping 2 (KT3) (n=16)
(KT1) (n=17) (KT2) (n=16)
shoulder surgery, (iii) negative Neer test: pain 3/10 when the upper
limb is elevated in the plane between flexion and abduction with
prevention of scapular rotation (Neer, 1983), (iv) no painful arc with Follow-up (n = 49)
shoulder flexion or abduction (pain 3/10 on a visual analogue Inmediate post-intervention
scale), (v) between 18 and 40 years of age, (vi) AHD 7 mm with arm Acromiohumeral distance (AHD) by ultrasonography in 0°/ 60°
at their side and (vii) able to provide informed, written consent.
Exclusion criteria were as follows: (i) presence of a skin injury or
condition on the shoulder that would contraindicate the use of KT, (ii)
refusal to participate once the conditions of the study were known.
Forty-nine participants were enrolled into the study (Fig. 1). Drop out
N=0
Informed written and verbal consent were obtained from all
participants before enrolment and baseline demographic and
clinical data were collected. The study was approved by The Med-
ical Research Ethics Committee of the Faculty of Nursing, Physio- Data pooled from each group for analysis
therapy, Podiatry and Occupational Therapy, University of Malaga
and conducted in accordance with the Declaration of Helsinki.
Fig. 1. Participant flow diagram.
2.2. Procedure

Participants were randomly assigned to 1 of 3 groups using a facing forward (Fig. 2). The tape was applied from the coracoid
random-number generator and concealed allocation. Group 1 (KT1) process anteriorly to the superior scapular angle posteriorly, to
received kinesiotape applied in the traditional manner from ante- maintain shoulder external rotation. The tape was stretched to
rior to posterior. Group 2 (KT2) received kinesiotape applied from 100% and immediately applied to the skin. Once applied, the
posterior to anterior and group 3 (KT3) received sham kinesiotape. adhesion of the tape to the skin was enhanced by rubbing the
All participants received the kinesiotape application the day after surface of the tape three times in an anterior to posterior direction.
the initial examination by the primary author. Each participant had The KT2 group received an identical treatment to the KT1 group,
ultrasound measures of AHD taken before and after the initial except that the tape was applied in the opposite direction: from the
kinesiotape application, in 0
and 60
of active shoulder elevation superior scapular angle to the coracoid process.
in the scapular plane (Fig. 1). The KT3 group received a sham kinesiotaping technique,
whereby a single strip was applied in the same place as KT1 and
2.3. Taping techniques KT2, but without tension and with the shoulder in neutral rather
than external rotation (Fig. 2). All tape applications looked similar.
All taping was applied by the primary author who has 15 years In all groups, kinesiotape was removed by the physiotherapist
experience as a musculoskeletal physiotherapist (ALS), to the after outcome data were collected.
shoulder of the dominant upper limb of each participant. The skin
was first cleaned with alcohol to aid adherence of the tape. Stan- 2.4. Ultrasound measurements
dard 5 cm wide blue k-tapeÓ was used for all taping techniques. The
KT1 group received a kinesiotape application. The goal of taping in The ultrasound examination of the shoulder was carried out by
this group was to facilitate shoulder external rotation in order to the second author (SNL). To reduce bias, the assessor was blinded to
increase AHD. A single strip was applied with the subject in erect group allocation. Each participant was issued an identification
standing, with the shoulder in maximal external rotation, palm number, and this was the only information provided to the

Please cite this article in press as: Luque-Suarez A, et al., Short term effects of kinesiotaping on acromiohumeral distance in asymptomatic
subjects: A randomised controlled trial, Manual Therapy (2013), http://dx.doi.org/10.1016/j.math.2013.06.002
 A. Luque-Suarez et al. / Manual Therapy xxx (2013) 1e5 3

Fig. 2. KT1 (left), applied with 100% tension in maximal external rotation. KT3 (right) applied with no tension and in neutral rotation (sham taping).

examiner. Outcome data were collected for all participants. participants were encouraged to move out of the standardised
The ultrasound examinations were carried out using the position. Participants were then repositioned and the second set of
MyLabÔ25Gold device (Esaote company, Genoa, Italy) with a 5e measurements taken. The ultrasound examiner was blind to their
12 MHz linear transducer. AHD was measured at 0
and 60
of initial measurements (values were obscured by placing a sticker on
shoulder elevation in the scapular plane, with the participant the ultrasound screen).
seated in an upright position (Kalra et al., 2010). To achieve an
upright position, with shoulder retraction and cervical and thoracic 2.5. Data analysis
extension, subjects were instructed to sit against the back rest of
the chair, sit up straight, pull their shoulders back and look straight A power analysis was carried out using DAHD, (change in
ahead. We chose 60
of elevation because the AHD is smallest be- AHD ¼ AHD after treatment minus AHD before treatment) as the
tween 60
and 120
(Flatow et al., 1994). A hydrogoniometer placed
on the participant’s arm was used to position the arm at 0
and 60

of scapular plane elevation (Hebert et al., 2000). To assist in posi-
tioning arm elevation in the scapular plane, a room divider was
positioned at an angle of 30
forward from the subject’s frontal
plane, which was marked with tape on the floor (Theodoridis and
Ruston, 2002). The participants were asked to maintain their arm
elevated actively with enough tension to maintain the position of
the hydrogoniometer (Fig. 3). Between measurements, participants
were instructed to bring their arm down to a resting position to
minimise shoulder fatigue (Theodoridis and Ruston, 2002).
To measure the AHD in 0
and 60
the ultrasound transducer
was positioned along the major axis of the humerus and parallel to
the flat superior aspect of the acromion, so that both the acromion
and humerus could be visualised. The AHD was measured going
straight down (vertically) from the acromion to the humeral head
(Girometti et al., 2006) (Fig. 4). Measurements of the AHD were
made at two locations: (1) at the most anterior part of the acromial
arch and (2) 1 cm behind the first measure. The mean of the two
measures was recorded (Desmeules et al., 2004). Excellent intra-
rater within-day reliability for ultrasonographic measurements of
acromion-greater tuberosity distance in healthy individuals has
been reported previously (ICC 0.97e0.99) (Kumar et al., 2010), (ICC
0.88e0.91) (Kumar et al., 2011).
We evaluated the intra-rater reliability of the ultrasound mea-
surement of AHD. Three AHD measurements were taken for all
participants by the same examiner, in 0
and 60
of shoulder
elevation, prior to kinesiotape application. A time interval of 2 min
was provided between each measurement. During that period, Fig. 3. Participant’s position for AHD assessment with ultrasonography.

Please cite this article in press as: Luque-Suarez A, et al., Short term effects of kinesiotaping on acromiohumeral distance in asymptomatic
subjects: A randomised controlled trial, Manual Therapy (2013), http://dx.doi.org/10.1016/j.math.2013.06.002
4 A. Luque-Suarez et al. / Manual Therapy xxx (2013) 1e5

Fig. 4. Ultrasound measurements of the AHD in 0
(left) and 60
(right) of scapular plane elevation. The area of subacromial space is equivalent to the distance between the two
white cross symbols.

primary response variable. A one-way analysis of variance with No adverse effects were reported by any of the participants
three groups required samples of size 17 in each group in order to during the treatment and follow-up periods.
identify between-group differences equal to 1 standard deviation of The intra-rater reliability of the AHD measurements was
within-group values with a power of at least 70%. This approach excellent (ICC 0.94 (95% CI: 0.90, 0.96) at 0
, and 0.87 (0.80, 0.92) at
was utilised as there was no prior information on variability of 60
). The ANOVA model for DAHD found that groups were signifi-
change values for AHD. cantly different (p ¼ 0.001), but angles were not significant
Analysis of variance models were constructed for DAHD, using (p ¼ 0.72), nor were inter-subject differences (p ¼ 0.30). Group-by-
the repeated measures nature of the data, with subject as a random angle interaction was not required in the model, and its exclusion
factor (nested within group), and group and angle as fixed factors. made no appreciable difference to the results. Each active group
The three groups were compared pairwise with a Bonferroni was significantly different to the control/sham group (KT1
adjustment for multiple comparisons. The data were analysed us- p < 0.001, KT 2 p ¼ 0.006) but the two active groups were not
ing SPSS version 20. A p value of <0.05 was considered statistically significantly different from each other (p¼0.95, all with Bonferroni
significant. adjustment). Table 2 presents the DAHD for the 3 groups and
Intrarater reliability of measuring AHD by ultrasound was esti- Table 3 presents the effect sizes for comparisons between each of
mated by calculating the intraclass correlation coefficient (ICC) for the 3 groups.
the second author, using a one-way random effect model.
4. Discussion

3. Results This study investigated whether kinesiotaping increases the

AHD in asymptomatic individuals compared with sham taping. The
Sixty-two participants were screened and 13 were excluded results demonstrate that the AHD, measured by ultrasound, can be
because of skin conditions or preference not to participate. This significantly increased by kinesiotaping. Our results also suggest
resulted in 49 participants who were enrolled into the study that there is no difference in the effect on the AHD if kinesiotape is
(Fig. 1): 17 in KT1 group and 16 participants each in KT2 and KT3 applied in the anterior to posterior direction or the opposite
groups. Demographic characteristics and baseline ultrasound direction.
measures of AHD are shown in Table 1. The mean age of the par- The main strength of our study is methodological rigour. We
ticipants was 23 years, 70 kg weight and 170 cm height, and 47% of used a randomised controlled trial design with true randomisation
the participants in the study were female. The mean baseline AHD and concealed allocation. We attained a follow-up of 100% of study
was 10.5 mm at 0
and 7.2 mm at 60
. There were no significant participants and there was blinding of the assessor and statistician.
differences in the demographic characteristic or AHD between the However, there are limitations of the current study that should be
three groups at baseline. recognized. First, we only investigated short-term effects of kine-
siotaping so we cannot make inferences about long-term effects.
Second, these results inform us about the effects of kinesiotaping
Table 1 on healthy individuals, and so the effects on AHD in people with
Baseline characteristics of subjects. subacromial impingement are unknown.
Experimental Experimental Sham group P Our results that kinesiotaping can increase the AHD in asymp-
group 1 (KT1) group 2 (KT2) (KT3) n ¼ 16 values tomatic subjects provides a good foundation to further investigate
n ¼ 17 n ¼ 16 the effects in those at risk of developing subacromial impingement
Age in years, 24.7 (5.3) 22.9 (4.1) 21.1 (2.6) 0.06 or those with established pain and dysfunction. A further limitation
mean (SD) is that measurements of AHD over 60
of abduction were not
Females (n) % (8) 47% (10) 62% (6) 37% 0.376
attained because of technical limitations with ultrasonography
Weight (kg), 68.6 (12.5) 70.2 (11.7) 72.3 (15.5) 0.726
mean (SD)
(Desmeules et al., 2004).
Height (cm), 168.5 (8.6) 168.6 (9.7) 169.1 (18.5) 0.191
mean (SD) Table 2
AHD (mm) 11.2 (3.3) 10.3 (1.8) 10.1 (1.2) 0.298 DAHD (mm) for the 3 intervention groups; CI: confidence interval.
in 0
,
Group Mean Standard error 95% CI
mean (SD)
AHD (mm) 7.3 (1.9) 7.4 (1.5) 7.0 (1.6) 0.781 KT1 1.158a 0.208 (0.741e1.576)
in 60
, KT2 0.856a 0.214 (0.426e1.287)
mean (SD) KT3 0.128a 0.214 (0.559 to 0.302)
a
AHD: acromiohumeral distance. Based on modified population marginal mean.

Please cite this article in press as: Luque-Suarez A, et al., Short term effects of kinesiotaping on acromiohumeral distance in asymptomatic
subjects: A randomised controlled trial, Manual Therapy (2013), http://dx.doi.org/10.1016/j.math.2013.06.002
 A. Luque-Suarez et al. / Manual Therapy xxx (2013) 1e5 5

Table 3 Conflict of interests

DAHD (mm) and effect size for comparisons between 3 intervention groups; CI:
confidence interval.
The authors declare no conflicts of interest and that this study
Group comparison Effect size 95% CI P value was not funded by any source.
KT1 vs KT3 1.28* (0.55e2.03) <0.001
KT2 vs KT3 0.98* (0.23e1.74) 0.006 References
KT1 vs KT2 0.30 (0.44 to 1.04) 0.95

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Please cite this article in press as: Luque-Suarez A, et al., Short term effects of kinesiotaping on acromiohumeral distance in asymptomatic
subjects: A randomised controlled trial, Manual Therapy (2013), http://dx.doi.org/10.1016/j.math.2013.06.002