ABSTRACT
Background and Aim: Functional ankle instability [FAI] as giving away after recurrent sprains is the most common disabling complications of ankle sprain among athletes
The purpose of this study was to compare the effects of core stability exercises and neuromuscular exercises on dynamic baknce and lower limb function of athletes with functional ankle instability
Material and Methods: Hence, 36 athlete women with FAI selected purposively by functional ankle tool questionnaire were assigned randomly to a control group [n=12], core stability group [n=12] and neuromuscular group [n=12]
Exercise groups performed 6 weeks of supervised core and neuromuscular training programs for 3 days per week. Before and after performing 6 weeks of core and neuromuscular exercises, dynamic balance, subjective and objective function of participants were assessed respectively by y-balance test, foot and ankle ability measure and 8 hopping test. Gathered data was analyzed by descriptive statistics and MANCOVAtestat significant level of p<0.05
Results: Research findings showed significant improvement in reach distance in three different directions of the y-balance test in the experimental groups compared with control group [P <0.05]. In addition, exercise groups had significant improvement in FAAM and FAAM Sport scores and 8 hop test scores compared with control group [P <0.05]
Nonetheless, there was no significant difference between the effects of these two exercise protocols on dynamic balance and lower limb function
Conclusion: Six weeks progressive supervised core stability and neuromuscular training programs significantly improved measured dynamic balance and lower limb function of athletes with FAI, but these two different exercise protocols had the same effects in improvement of these mentioned factors in athletes with functional ankle instability
ABSTRACT
Background and Objective: Skeletal muscle expresses several neurotrophin and their receptors which providing the basis for neurotrophin signaling within the muscle compartments. This study was done to evaluate the effect of a session of resistance exercise on mRNA expression of NT-3 and TrkC proteins in soleus muscle of Wistar Rats
Methods: In this experimental study, 16 male Wistar rats were randomly allocated into exercise and control groups. The resistance training protocol consisted of climbing a 1-meter-long ladder, with a weight attached to a tail sleeve. Expressions of NT-4/5 and P75, quantitatively were measured using RT-PCR
Results: There was not any significant alteration in NT-3 mRNA in soleus muscle after resistance exercise. However, one session of resistance exercise significantly increased mRNA expression of TrkC [1.7 Folds] in soleus muscle [P<0.05]
Conclusion: Resistance exercise increases TrkC expression in soleuse muscle of wistar rats
Subject(s)
Animals, Laboratory , Resistance Training , RNA, Messenger , Gene Expression , Neurotrophin 3 , Receptor, trkC , Muscle, Skeletal , Rats, WistarABSTRACT
Trophic factor family plays a key role for neuromuscular system healthy. This study was carried out to determine the effect of one session of resistance exercise on protein content and mRNA expression of NT4/5 in rat slow and fast muscles. In this experimental study, sixteen adult male rats randomly were allocated into resistance exercise [T] and control groups. The resistance training protocol consisted of climbing a 1-meter-long ladder, with a weight attached to a tail sleeve. Quantitative Real time RT-PCR for NT-4/5 expression and ELISA Kit for protein assay were used. Resistance training significantly decreased mRNA expression and increased protein of NT4/5 in soleus muscle [P<0.05]. Significant alteration was not detected in flexor hallucis longus muscle. One session of resistance training can alter protein and mRNA of NT-4/5 in skeletal muscle and this alteration was dependent on muscle type
Subject(s)
Animals, Laboratory , Male , Muscle, Skeletal/metabolism , RNA, Messenger/metabolism , Receptors, Nerve Growth Factor , Rats , Random Allocation , Enzyme-Linked Immunosorbent Assay , Reverse Transcriptase Polymerase Chain Reaction , Physical Conditioning, AnimalABSTRACT
Assure universal bonding resin is a modified cement with fluoride releasing property. It is claimed to provide adequate bond strength between the bracket and enamel in wet conditions; although more studies are required in this regard. This study compared the shear bond strength of Transbond XT and Assure universal bonding resin to dry and saliva-contaminated enamel in vitro. In this in vitro study, 60 extracted human premolars were selected and stainless steel brackets were bonded to enamel surfaces. Bonding of brackets to enamel surfaces was done using Assure universal bonding resin [dry condition], Transbond XT [dry condition] and Assure [saliva-contaminated condition]. The shear bond strength of brackets to the enamel was determined by Zwick/Roell machine in three groups. Data were analyzed using one-way analysis of variance [ANOVA], and the Kruskal Wallis test. The mean shear bond strength of brackets to enamel surfaces bonded with Assure [dry condition], Transbond XT and Assure [saliva-contaminated condition] was 14.18 +/- 4.78 MPa, 16.13 +/- 5.49 MPa and 13.32 +/- 4.74 MPa, respectively [with no significant differences]. Non-parametric Kruskal-Wallis test found no significant differences regarding the adhesive remnant index [ARI]. [P=0.053]. Bonding of stainless steel brackets to enamel surfaces with Assure universal bonding resin provided adequate bond strength in dry and saliva-contaminated conditions. Thus, it may be used for bonding of orthodontic brackets to the enamel surfaces in the clinical setting