Electromy ographic responses of vastus muscles to dynamic postural perturbations in athletes with patellofemoral pain syndrome

Background and Aim: Patellofemoral pain syndrome [PFPS] is among the most common musculoskeletal disorders in the athletes and active individuals

Observation of muscular responses to unexpected perturbations is one of the most common methods to evaluate the neural strategies. The aim of this study was to evaluate the EMG response of vastus muscles to dynamic postural perturbations in the athletes with PFPS

Material and Method: This study included 10 male athletes with PFPS and 10 healthy male athletes. NPRS scale was used to assess pain. EMG activity of VMO and VL muscles measured during dynamic postural perturbation. The EMG signals were collected using a 16-channel BTS-FREEEMG 300 system, manufactured in Italy. Independent-1 test was used for data analysis

Results: RMS values for VMO and VL muscles in PFPS group, were higher than the corresponding values of the control group by 33.59% and 33.35% respectively, in the forward postural perturbation. There was a significant difference in VL muscle RMS values between the two groups [P=0.04]

RMS values for VMO and VL muscles in PFPS group were higher than those of the control group by 38% and 49.52% respectively, in the backward postural perturbation and there was a significant difference in VL muscle RMS values between the two groups [P=0.04]

Conclusion: The results showed that valtus muscles were more active in response to dynamic postural perturbation in the athletes with PFPS in comparison to the healthy athletes

Patellofemoral pain syndrome and in general joint disorders can lead to dysfunction in the whole sensory-motor system

Therefore, instead of focusing on local symptoms we should examine the whole body in sensory-motor system dysfunction

[Comparison the effects of cardiac rehabilitation program [concurrent endurance and resistance training] on exercise capacity of men and women patients with coronary artery disease]

The importance of cardiac rehabilitation has been widely acknowledged, after myocardial infarction. Improved physical capacity is an important outcome of cardiac rehabilitation. Therefore, accurate measurement of the exercise tolerance of cardiac patients before and after cardiac rehabilitation program using an objective measure is important. To comparison the effects of cardiac rehabilitation program [concurrent endurance and resistance training] on exercise capacity of men and women patients with coronary artery disease. In this prospective study, among 40 patients, 20 patients [10 female with mean age 54.5 +/- 5.44 and 10 male with mean age 53.2 +/- 7.68] who arrived to Phase II cardiac rehabilitation were assessed. 6MWT and Exercise Test [ET] were performed at the beginning and at the end of 8 weeks program [3 days per week] in the both group of the patients. Both of 2 groups had significant response to Cardiac rehabilitation program after cardiac rehabilitation, functional capacity [6MWT] and exercise capacity [ET]. There is no significant difference between final value of 6mwt distance, Exercise capacity [Exercise test time], Heart Rate Recovery [HRR], Rate Pressure Product [RPP], VO2 peak between men and women patients with Coronary Artery Disease before and after cardiac rehabilitation program, but all of above improved significantly in both CRP men and women [p < 0.001]. Probably all of men and women patients affected of exercise training similarity