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Concentric plantar flexor torque deficits in female athletes with functional ankle instability
, , ,
Volume 10, Issue 4 (10-2012)
Abstract

After an ankle injury, residual symptoms can followed to recurrent sprain in
physical activity and 30% of its lead to functional ankle instability (FAI)
Therefore, the aim of this study was to examine the isokinetic concentric and
eccentric torque measures of the ankle musculature to body weight in female
athletes with and without FAI.30 female athletes, who play in pro league of
Tehran, participated in this descriptive study. Participants were assessed using
questionnaire and clinical tests. Isokinetic measurement speed for inversion and
eversion was 60 and plantar flexion and dorsi flexion was 120 degree/
second.Data were analyzed by independent T- test.The results indicated a
significant difference in peak torque of concentric plantar flexor to body weight
in FAI and healthy groups (P<0.05).Therefore, concentric plantar flexion may be
an important contributing factor to FAI; this finding could also lead to more
effective protocols in the treatment and rehabilitation of FAI


Effect of arginine supplementation on O2 uptake kinetics response in female taekwondo athletes
Dr Abbas Saremi, Dr Masood Golpayegani, Mrs Zeinab Moradi,
Volume 13, Issue 10 (10-2015)
Abstract

Introdiction and Aim: Nowadays, due to the epidemic of sports supplements, the effects of these
supplements on athletic performance require analysis and evaluation.The aim of the present study was to
investigate the effect of arginine supplementation for one week on oxygen uptake kinetics and time to
exhaustion in female taekwondo athletes.
Method: In this semi-experimental study with pretest – posttest design, eighty female taekwondo athletes
(age: 19.88±2.33 y, height: 167.53±6.04 cm, weight: 60.98±2.4 kg) were randomly assigned to argenine
supplementation (n=9) or placebo (n=9) groups. Subjects performed the incremental test (initially, the work
load 50 watts and 30 watts increase in workload every minutes, as long as subjects will be able to maintain
the highest pedal rate and the failure to reach). To simulate a taekwondo match day test session consisted
of three maximal incremental test intervals (1 to 2 hours). The experimental group was supplemented with
6g arginine powder and placebo group received 6g microcrystalline cellulose each day for one week.
Seven days after, post test accordingly pretest was used by all subjects. Pulmonary gas exchange was
measured by gas analyzer to breath-by breath method. Oxygen uptake kinetics variables (oxygen deficit,
time constant 1, time constant 2) were evaluated by gas analyzer with breath-by breath method. Data was
analyzed using two ways ANOVA.
Results: The time to exhaustion was extended following consumption of arginine (p<0.05). Also the
findings showed that arginine supplementation resulted in a speeding of the oxygen uptake kinetic (oxygen
deficit, time constant 1, time constant 2) (p<0.05).
Conclusion: It seems that arginine supplementation improves oxygen kinetics factors and time to
exhaustion in female taekwondo athletes.


The Effect of +11 Injury Prevention Program on the Jumping-Landing Error in Female Amateur Soccer Players
Mohammad Alimoradi, Mansur Sahebazamini, Roya Bigtashkhani,
Volume 19, Issue 22 (12-2021)
Abstract
Background and Objective: The movement patterns play a key role in the incidence of non-contact ACL injuries. This study attempts to investigate the effect of the +11 program on the jump-landing pattern in female amateur soccer players. Methods: 30 female amateur soccer players were randomly divided into experimental and control groups (15 people in each group). The experimental group performed the +11 program 3 times per week for 16 weeks whereas the control group maintained their regular warm-up method during the study. The jump-landing pattern of the players was investigated by a Special football jump-landing task using the landing error scoring system. Results: The results of the study showed that the 16 weeks of implementation of the +11 program significantly improved the jump-landing error scores of the players in the experimental group. Also, comparison of the results between experimental and control groups showed that there is a significant difference between the two groups. Conclusion: It can be concluded that the +11 program could improve the jump-landing pattern of the female soccer players in pre_ participation evaluation (PPE). Therefore, trainers are advised to use this program as an alternative to regular warm-ups in order to prevent injury.

The Effect Of Using Silver And Zinc Oxide Nanoparticles Clothing On The Physiological Responses And Sport Performance Of Active Women
Masomeh Aghazadeh, Sakineh Aminnezhad,
Volume 22, Issue 27 (8-2024)
Abstract
One of the ways to optimize sports activities is the use of nanotechnology. Silver and zinc oxide nanoparticles have valuable effects in improving sports performance of athletes. The purpose of this research was to investigate the effect of clothes containing silver and zinc oxide nanoparticles on the physiological responses and sports performance of female athletes. The statistical population of the research was women active in public sports in Maku city. The sample size was selected by random method and 10 female athletes (with an average age of 25.9, an average weight of 60 kg and a body mass index of 25.49) were selected. The effect of the treatments (sports activity with and without nano clothes) on endurance, moisture absorption, bacterial removal, systolic and diastolic blood pressure and heart rate of the athletes were investigated. The results showed that the use of clothes containing silver and zinc oxide nanoparticles increases their endurance. These clothes lead to an increase in bacteria removal in them. The clothes containing these nanoparticles were effective in reducing their blood pressure. It also improved moisture absorption in female athletes. In general, clothes containing silver nanoparticles and zinc oxide nanoparticles have an effect on reducing the physiological responses and sports performance of female athletes.

 
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