International Journal of Sports Medicine and Rehabilitation


LOWER LIMB MUSCLE ACTIVITY ADJUSTMENT AND LACTATE VARIATION IN RESPONSE TO INCREASED SPEED WITH PROPORTIONAL RESISTANCE IN YOUNG ADULTS

Research Article of Internal Journal of Sports Medicine and Rehabilitation Lower Limb Muscle Activity Adjustment and Lactate Variation in Response to Increased Speed with Proportional Resistance in Young Adults Martín G. Rosario* PT, PhD, CSFI, ATRIC, Daniel Heistand, SPT, Catie Lewis, SPT, Natalie Valdez, SPT, Matthew Nevarez, SPT, Mark Weber PT, PhD, ATC Texas Woman’s University, Physical Therapy Program, Dallas Campus; Texas. Background: Various pathologies require physiotherapists to adjust therapy interventions, some of which are to reducing joint loads while strengthening the lower extremity musculature. Tools such as a sled can be used to accomplish a small load with high-repetition-resistance exercises. Purpose: This study examined the impact of pushing a sled with regulated resistance on lower limb muscle activation and fatigue while walking and running. Methods: The neuromuscular activity of the tibialis anterior (TA) and gastrocnemius (GA) muscles of thirty-six young adults were recorded using surface electromyography (EMG) and lactate data from a Nova Biomedical Lactate Plus meter. The sled used was the XPO Trainer, which maintains a steady resistance proportional to the user regardless of the forces applied to accelerate the sled. Baseline lactate was collected and followed by one of three protocols: run, run-push (RP), or walk-push (WP). Each included three trials over a 40 ft distance, during which EMG data were collected per trial, whereas lactate was collected following the completion of the appointed task. Results: Repeated measures ANOVAs were performed, showing a considerable increase (P<0.05) in lactate levels between the WP and RP groups. Pushing the sled at both WP and RP speeds demonstrated substantial (P<0.05) neuromuscular modifications, primarily in the TA, followed by the GA, in comparison to running. Conclusion: Pushing a constant resistance sled provoked distinct modifications in the lower limb musculature associated with speed. Running while pushing the sled elicits a higher blood ...

PROGRESSIVE EXERCISE THERAPY IN MUSCLE DYSTROPHY: TWO CASE STUDIES IN ADULT PATIENTS WITH DM2 AND LGMD2D

Research Article of Internal Journal of Sports Medicine and Rehabilitation Progressive exercise therapy in muscle dystrophy: two case studies in adult patients with DM2 and LGMD2D Nico Nitzsche1*, Noah Augustin1, Michael Klotz1, Henry Schulz1 1Professorship of Sports Medicine/ Sports Biology, TU Chemnitz, Thüringer Weg 11, 09126 Chemnitz, Germany. These two case studies aimed to investigate the effect and acceptance of progressive strength training in patients with muscular dystrophy. Case 1 completed a progressive resistance exercise over 12 weeks. The results showed increases in leg extensor strength, hand strength and balance. Furthermore, the anaerobic test showed an increase in the maximum glycolysis rate. Creatine kinase levels were reduced while maintaining low muscle soreness. Case 2 conducted seven weeks of electronically assisted strength training and electromyostimulation. In the course of the training, an increase in the self-contribution of the performance in the execution of movement was observed in the assisted strength training. Furthermore, an increase in the intensity of external stimuli was observed. The creatine kinase showed a reduction with physiological behavior of muscle soreness. The results demonstrate the acceptance and feasibility of progressive exercise protocols used to increase performance in two cases of muscular dystrophy. Keywords: Muscle dystrophy; Resistance exercise; Exercise therapy; Muscle soreness; Creatine kinase ...

MEDIAL TIBIAL STRESS SYNDROME: THE RELATIONSHIP BETWEEN GENDER AND LOWER-EXTREMITY FUNCTIONAL PERFORMANCE AMONG COLLEGIATE TRACK AND FIELD ATHLETES

Research Article of Internal Journal of Sports Medicine and Rehabilitation Medial tibial stress syndrome: The relationship between gender and lower-extremity functional performance among collegiate track and field athletes Megan E. Sievers BA, Andrew M. Busch EdD, CSCS Ohio Wesleyan University. Medial tibial stress syndrome (MTSS) is a common lower extremity injury in track and field athletes. Many risk factors are associated with MTSS, and lower extremity performance may become altered in athletes suffering from prior symptoms, potentially increasing risk of future injury. The purpose of this study was to first examine the effect a prior history of MTSS has on lower-extremity measures, per gender, in collegiate level track and field athletes, and then determine if such measures predict future injury. Fifty-three healthy Division III collegiate track and field athletes (mean age = 19.40 ± 1.13 years) completed an injury history questionnaire along with five preseason lower-extremity functional tests including: ankle dorsiflexion (DF), single-leg anterior reach (SLAR), two timed single-leg balance (SLBAL) tests on a force plate, and single-leg hop for distance (SLH). Performance data were compared across gender and questionnaire data regarding injury history and occurrence of MTSS. Fifteen subjects (28%) reported previous MTSS symptoms within the last 2 years. Chi-square analyses revealed females experienced more diagnoses compared to males (p = .03). Independent t-tests revealed differences between gender on all SLBAL tests, as males performed better on all recorded measures (p < .001 – p = .003). No significant differences were noted in lower-extremity performance tests between subjects with and without prior MTSS injuries. Regression analyses using postseason injury questionnaire data revealed prior MTSS injuries had 17.3 higher odds of experiencing MTSS during the season (adjusted odds ratio [AOR] = 17.33, 95% CI: 3.5 - 86.4; p = .001). Keywords: Center-of-pressure excursion; Force plate; Movement system; Y-balance test; Track ...

PHYSIOTHERAPISTS AND PHYSICAL ACTIVITY AT WORK AMONG IN BENIN AND FRANCE

Research Article of Internal Journal of Sports Medicine and Rehabilitation Physiotherapists and physical activity at work among in Benin and France ALAGNIDE HE, NIAMA NATTA D, AGBO OVE, DJIVOH Y, ASSOGBA F, SOGBOSSI E, DAHOUETO W, KPADONOU GT. University Clinic for Physical Medicine and Rehabilitation/ CNHU-HKM (Cotonou/ Benin) Physical activity at work is an important indicator of the level of activity. Physiotherapists are one of professionals for the prevention against sedentary lifestyle. Objective: To assess the level of physical activity at work among physiotherapists in Benin and France. Method: Descriptive and analytical cross-sectional study, conducted from July 2017 to July 2018. With physiotherapists who consent to participate to this study we use a pedometer. They wear it at work for five consecutive days. The average number of daily steps at work was determined. Physiotherapist’s level of inactivity was assessed using the Baecke questionnaire. Data was analyzed using Epi Info 13.0. X2 of Pearson’s and ANOVA tests. They were used for the comparison of qualitative and quantitative variables respectively. Significance level was set at 0.05. Results: Among fifty-four physiotherapists evaluated, forty-four (81.5%) were sedentary, with a significant level of sedentary lifestyle in twenty-six cases (48.11%). This limitation of physical activity at the workplace and the level of sedentary lifestyle of the subjects were comparable among Beninese and French physiotherapists and they were not associated with any of the factors studied. Conclusion: The level of physical activity of physiotherapists at work is limited. Raising the awareness of these actors seems essential. Keywords:Physical activity at work, sedentary lifestyle, physiotherapy, Benin, France ...

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International Journal of Sports Medicine and Rehabilitation

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