University of Tehran PressSport Sciences and Health Research2981-02054120120320The Comparison of Bone Mineral Density in Dominant and Non-Dominant Limbs of Iran Female Professional Handball Playersمقایسۀ تراکم مواد معدنی استخوانی اندام برتر و غیربرتر زنان هندبالیست حرفهای ایران5192896910.22059/jsmed.2012.28969ENNaderRahnama0000-0002-0443-4303KhalilKhayambashiEfatBambaeichiSamanehJafarpourJournal Article19700101To throw and kick the ball, most players use a dominant hand or leg which may
increase bone mineral density (BMD) of dominant limb. The aim of this study was
to compare BMD of dominant and non–dominant hand and leg of professional
female handball players. 15 professional handball players (Mean SD: age
23.6+3.1 yr, height 169.4+3.6 cm, weight 62.9+5.7 kg) participated in this study.
Bone mineral density of radius (dominant and non – dominant hand), femoral neck
and trochanter (dominant and non – dominant leg) were measured by dual energy
X-ray absorptiometry (DEXA). The results of this study showed no significant
difference in BMD between dominant (381.7mg/cm2) and non – dominant hand
(384.3mg/cm2) in handball players (P>0.05). But a significant difference was
observed in BMD between dominant (925.4mg/cm2) and non – dominant leg
(956.4mg/cm2) as BMD of non – dominant leg was about 10% higher than
dominant leg (P<0.05). BMD of dominant and non – dominant legs was
significantly greater than dominant and non – dominant hands (P<0.05). Lower
extremities had significantly higher BMD than upper extremities (P<0.05). In
contrast, upper body had significantly higher BMD than lower body (P<0.05). It
can be concluded that involvement of non – dominant leg in taking off, start, stop,
jump and land more and more increases BMD in handball players.https://sshr.ut.ac.ir/article_28969_471943936e16603c99208c6a878d6ee3.pdfUniversity of Tehran PressSport Sciences and Health Research2981-02054120120320The Comparison of Scapular Position in Dominant and Non-Dominant Limbs of Girls with and without Hyperkyphosis Abnormalityمقایسة وضعیت قرارگیری استخوان کتف با تاکید بر اندام غالب و غیرغالب در دختران دارای کایفوز افزایش یافته و طبیعی21332897010.22059/jsmed.2012.28970ENSaraChashomiRezaRajabi0000-0002-0464-5688Journal Article19700101Scapula plays an important role in producing smooth and coordinated
movement of shoulder girdle. Also, a change in natural scapula position has a direct
relationship with some postural abnormalities. Since in dominant limb, there are
differences in the ways of environmental nerves such as higher sensory detection
threshold, the conduction speed as well as side differences in muscles, the aim of
the present study was to compare scapula position (protraction and upward
rotation) in dominant and non-dominant sides of female university students with
and without hyperkyphosis abnormality. The study method was descriptive and
comparative. Subjects were selected by non-random method and they had no
history of sport, pain and injury in their shoulder and spine. Then, using Iranian
thoracic kyphosis degree norm, subjects were divided into two groups of
hyperkyphosis and normal kyphosis (mean age 21±1.05, 21.1±1.32 yr respectively).
Scapula protraction and upward rotation degree were calculated using Divta
method. The results showed no significant difference in protraction and scapula
upward rotation between dominant and non-dominant sides of normal kyphosis
group (p=0.09, p=0.19) whereas in hyperkyphosis group, there was a significant
difference between thoracic kyphosis degree and the distance of the two scapulas
(r=0.37). Also, in this group, a significant difference was observed in scapula
protraction between dominant and non-dominant sides (p=0.001). Although there
was no significant difference in protraction and scapula upward rotation between
dominant and non-dominant sides of normal kyphosis group, these values were
higher in dominant side while scapula protraction was significantly higher in
1 - Corresponding – Author : Tel : 09155710676, Email : s_cheshmi@bandargaziuu.ir
Journal of Faculty of Physical Education, University of Tehran 7
dominant side of hyperkyphosis group. Therefore, dominant hand might be
responsible for some degrees of asymmetry of scapula position and the dominant
side is more influenced by the hyperkyphosis deformity. It is recommended that in
corrective exercise programs, more attention be paid to muscle imbalance in
dominant limb to treat hyperkyphosis deformity. Also, normal subjects must
perform the exercises to prevent scapula asymmetry and to create muscle balance
in dominant limb.https://sshr.ut.ac.ir/article_28970_58bd65d260f7392f772548f3ca6fe8b3.pdfUniversity of Tehran PressSport Sciences and Health Research2981-02054120120320The Comparative Study of Spinal Alignment and Trunk Injuries in Freestyle and Greco-Roman Wrestlersبررسی مقایسه ای راستای ستون فقرات و آسیب های تنه در کشتی گیران آزاد و فرنگی35472897110.22059/jsmed.2012.28971ENSiamakAmirianBahmanMirzaeiHosseinHosseiniJournal Article19700101The aim of this study was to compare spinal alignment and trunk injuries in
freestyle and Greco-Roman wrestlers. For this purpose, 200 professional wrestlers
(100 freestyle and 100 Greco-Roman) were selected randomly. Injury
questionnaire was used to collect trunk injury data. Also, 50 freestyle wrestlers and
50 Greco-Roman wrestlers were selected to assess their spinal alignment using
spinal mouse. Craniovertebral angle was measured through picturing the side view
of head and neck using AutoCAD software. The data were analyzed by t student
test. The results indicated that the neck injuries of freestyle wrestlers were
significantly higher than Greco-Roman wrestlers (P=0.035), but the rib fracture
(P=0.033) and craniovertebral angle (P=0.048) were significantly higher in
Greco-roman wrestlers than freestyle wrestlers. There was no significant
difference in muscular, articular, back and waist injuries, kyphosis and lordosis
between Greco-Roman and freestyle wrestlers (P>0.05). According to the results
of this study, freestyle wrestling techniques should be instructed more
professionally because one of the main reasons of neck injury is poor performance
of underrun technique and other techniques that makes neck to get involved in the
opponent's hands. Greco-Roman wrestlers should also be instructed to bend their
knees to use quadriceps muscle rather than erector spinae muscle for lifting an
opponent.https://sshr.ut.ac.ir/article_28971_2c69885e7051cf29c848b2ad57577449.pdfUniversity of Tehran PressSport Sciences and Health Research2981-02054120120320The Relationship between Posture and Somatotype with Performance of Iran National Dragon Boat Womenارتباط وضعیت تنه و تیپ بدنی با عملکرد بانوان تیم ملی قایقرانی دراگون بت49612897210.22059/jsmed.2012.28972ENMadihePourbehzadiHeiydarSadeghi0000-0001-6563-9882HamidAgha Ali NejadJournal Article19700101Success in a specific sport field requires not only good physical condition but
also knowledge of body structure and somatotype suitable for that sport. The aim
of the present study was to study the relationship between posture and somatotype
with biomechanical performance of Iran national dragon boat women. All 20
dragon boat rowers of Iran national team participated in this study as the sample.
Postural parameters (kyphosis, lordosis, dorsal and lumbar scoliosis, and uneven
shoulders) and biomechanical parameters (speed, strength, and anaerobic
capacity) were the variables of the research. Descriptive statistics such as mean
and standard deviation as well as inferential statistics including one-sample t test,
multivariate regressions, and one-way ANOVA were used for data analysis at
P?0.05. The findings showed that most rowers suffered from postural deviations to
some extent. Comparing the average postural parameters of the rowers and the
control group revealed that rowers had higher levels of lordosis, lumbar scoliosis,
and uneven shoulders. A significant relationship was observed between speed and
strength with postural parameters while there was no significant relationship
between anaerobic capacity and postural parameters. Moreover, in terms of
somatotype, there was a significant relationship between mesomorphy and
anaerobic capacity. The results indicated a relationship between a percentage of
spinal deviation and somatotype of dragon boat women and rowers. In order to
have a clearer interpretation of the results of the present research, more studies,
especially longitudinal, are suggested in this regard.https://sshr.ut.ac.ir/article_28972_54656fbcf7d4d1f055f6d55f35ca1806.pdfUniversity of Tehran PressSport Sciences and Health Research2981-02054120120320The Effect of Genu Varum on Soccer Kick Performance in Adolescent Male Soccer Playersتأثیر زانوی پرانتزی بر اجرای تکنیک شوت فوتبال در پسران فوتبالیست نوجوان63722897310.22059/jsmed.2012.28973ENAmirHayatiNaderFarahpourDonyaRahmaniJournal Article19700101Knee joint with a complex structure suffers from several abnormalities. Genu
varum is one of these abnormalities from which 73% of soccer players suffer. The
present study was carried out to investigate the effect of genu varum on soccer kick
technique in male adolescent soccer players. This study used a comparative field
method. For this purpose, 13 soccer players with genu varum (experimental group)
and 13 soccer players with normal knee (control group) were randomly selected.
Genu varum was measured and recorded by caliper. The technique of instep soccer
kick was measured by the standardized test of Football Association of England.
Independent t test was used for statistical analysis at 95% significance. The results
showed better performance of experimental group than control group (p?0.05).
Mean score obtained in genu varum and normal group were respectively
16.53+2.50 and 12.30+3.40. The findings showed that genu varum does not
interfere with instep soccer kick technique but also improves the instep soccer kick
when compared with the normal knee group.https://sshr.ut.ac.ir/article_28973_1103431781066acc43e2b4cf5749861f.pdfUniversity of Tehran PressSport Sciences and Health Research2981-02054120120320The Effect of Strength Exercise Program on the Hip Lateral Rotator Muscles on Correcting Pronated Abductor Footتاثیر برنامة تمرین قدرتی بر عضلات ابداکتور و چرخانندة خارجی ران در اصلاح پای چرخش یافته به داخل پرونیشن پا73882897410.22059/jsmed.2012.28974ENAmirDadashpoorSadredinShojaedinJournal Article19700101Muscle activity of the hip has been shown to influence movement of the lower
extremity. The aim of this study was to examine the effect of six weeks of strength
exercise program on the hip abductor and lateral rotator muscles when correcting
excessive foot pronation. 30 male subjects (age: 21.63±2.0 yr, weight: 71.93±7.62
kg, height: 177.33±7.52 cm, BMI: 22.81+0.99 with excessive foot pronation) were
purposefully selected and participated in this semi-experimental study. Foot
pronation was estimated through measuring valgus angle and those subjects with
an angle>10° were divided into experimental (n=15) and control (n=15) groups.
Before the beginning of the strength program, foot pronation was measured by a
goniometer and the strength of hip abductor and lateral rotator muscles were
assessed using hand-held dynamometer. The experimental group participated in
strength training program for the proximal muscles of lower extremity three days a
week for six weeks. The control group continued their daily activity. After the
program, muscle strength and the angle of foot pronation were measured again.
Independent and paired t tests were used to analyze the data (p?0.05). The results
showed no significant difference in foot pronation in pretest between two groups
while a significant difference was observed in the posttest. A significant difference
was observed in the strength of hip abductor and lateral rotator muscles and foot
pronation between pretest and posttest for the experimental group while no
significant difference was observed in the control group. The results showed the
effectiveness of strength training program to decrease and correct excessive foot
pronation.https://sshr.ut.ac.ir/article_28974_27b92327e4ae1e4d9c17048ca6fc44cc.pdf