RESUMO
Purpose: This study aimed to examine the effect of Body-Weight-Supported Treadmill Training [BWSTT] exercises on functional ambulation profile in patients with paraplegic spinal cord injury
Methods: This was a quasi experimental study with pre test and post test. The statistical population consisted of paraplegia spinal cord injured persons in Shahrekord City. Seventeen voluntary patients with paraplegic spinal cord injury [American Spinal Injury Association [ASIA] B, C classification, with the demographic data [mean +/- SD] of age 32.53 +/- 1.793 y, height 175.71 +/- 1.658 cm, weight 71.59 +/- 2.442 kg, and Body Mass Index [BMI] 23.18 +/- 0.828 kg/m2] selected with convenience sampling. The subjects were randomly assigned to BWSTT group [n=10] and traditional exercise group [n=7]. Both groups were trained 60 min per session, 4 sessions per week for 12 weeks. BWSTT included 15 min warm up on fixed gear bike, 45 min BWSTT with 50% body weight and finally 10 mi cold down. About 10% load was added each week. Traditional exercises included 15 min warm up plus 45 min stretch exercise and resistance training. SPSS 19.0 software was used to examine between groups. An independent t test was used to compare the changes between pretest and post test between BWSTT and traditional training groups
Results: The data showed that there were significant differences between BWSTT and traditional groups with regard to changes in lower extremity motor score [P<0.001], walking index spinal cord injury [P=0.002], 6 min walking test[P=0.001], and 10 meter walking test [P=0.001]
Conclusion: BWSTT in comparison with traditional exercise can improve more motor function and quality and quantity of walking in people with paraplegic spinal cord injury [ASIA B, C classification]
RESUMO
Purpose: The purpose of this study was to investigate the kinematic and kinetic variables, which predict anterior tibia shear force during single-leg landing in female athletes
Methods: Forty-three subjects [mean and standard deviation for age 21.12 +/- 2.00 y, height 168.58 +/- 7.62 cm, and weight 60.27 +/- 7.80 kg] participated in this study. Kinematic and kinetic variables of lower extremity and trunk during single-leg landing were collected by 5 Vicon cameras and Kistler force plate. Stepwise multiple regression and Pearson correlation were used to identify predictor variables of anterior shear force [P
Results: Peak of extensor moment [P = 0.004, r = -0.394] and maximum knee flexion [P = 0.007, r = -0.370] were the best predictors that explained 30% of the variance of the shear force data. Therefore, rise in maximum extensors moment of knee and knee maximum flexion causes increase and decrease in anterior shear force, respectively. In addition, a significant relationship between trunk flexion [P = 0.039] and knee flexion angular velocity [P = 0.048] at the moment of initial contact with the anterior shear force
Conclusion: On the basis of previous research, and the relationship between clinical findings, the noncontact of anterior cruciate ligament injury during landing was confirmed. These results can be used in prospective studies examining modifiable noncontact risk factors of ACL injury
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Soccer is a contact sport in which the players are frequently faced with the risk of injury. It has been shown that the force exerted on the head during heading can be as much as 500-1200 Newton [N]. The main objective of this study was to determine whether there was any relationship between the force exerted on the head and several biomechanical and anthropometrical parameters related to heading free kicks. A total of 16 semi-professional soccer players with at least 5 years experience participated in this study. The mean age, height, and weight of the study participants were 21.36 +/- 5.67, 178 +/- 5.99 cm, and 70.55 +/- 8.55 kg, respectively. To measure the force exerted on the heads of the players, a pressure gauge was installed on their foreheads. Each participant was asked to defend the ball using the heading technique three times. A camera with a sampling frequency of 150 frames per second was used to record the moment of impact between the ball and head during each heading event. For each participant and replicate, the ball and head velocity [m/s] as well as the angular body changes [degrees] were calculated using MATLAB and AutoCAD softwares, respectively. Descriptive statistics, including means and standard deviations were used to describe the data. Pearson correlation coefficient [alpha = 0.05] was used to examine potential relationships between the variables of interest. Significant correlations existed between the force exerted on the head during heading, participant age, body mass, body fat percentage, and head perimeter [P < 0.05]. The study revealed the significance of anthropometric variables related to heading, such as age and head perimeter. Therefore, it was concluded that these variables should be considered when teaching and practicing the heading technique with players of different ages and anthropometric sizes
Assuntos
Humanos , Fenômenos Biomecânicos , Antropometria , FutebolRESUMO
Since disorders in neuromuscular performance and imbalance are the main cause of falling among the middle aged, their aspects including rehabilitation of balance are the main concern the researchers attend to them. The aim of this study was to determine the effects of eight weeks aquatic balance training [ABT] and detraining on neuromuscular performance and balance in healthy middle aged male. Thirty adult male subjects were randomized into two groups of ABT and control [n=15 per group]. Berg balance scale, Timed Up and Go and 5-Chair stand tests, as they are indicators of balance and neuromuscular performance in older subjects, were taken as pretest and post-test and after four, six, and eight weeks of detraining as well. The ABT consisted of the sessions that lasted one hour, three times a week, for eight weeks. Results showed that neuromuscular performance and balance improved significantly in ABT group [P<0.05], and there were not any significant differences in these parameters between post-test and four, six, and eight weeks of detraining periods in this group [P > 0.05]. ABT can affect neuromuscular performance and balance in healthy middle aged male, and reduce the probability of falling among them. Moreover, the effects of these training are persistent after detraining periods. Hence, ABT can be recommended as an effective neuromuscular and balance training in healthy middle aged male