Efficacy of accommodating variable-resistance training on muscle architecture, peak torque, and functional performance in patients with juvenile idiopathic arthritis: A randomized controlled trial.

Purpose: This study sought to find out if a 6-week accommodating variable-resistance (AcVR) training might enhance muscle architecture, peak torque, and functional performance in patients with juvenile idiopathic arthritis (Juv-IA). Methods: Fifty-eight patients with polyarticular Juv-IA (aged 12-18 years) were involved in a randomized controlled trial. They were allocated into two groups: the AcVR group (n = 29; underwent AcVR training, and the control group (n = 29; received the usual exercise regimen). Interventions were applied three times a week over six consecutive weeks. Measurements were done at baseline and after the intervention. The primary outcome measures were muscle architecture and peak torque, with functional capacity being the secondary measure. Results: Compared to the control group, the AcVR group showed favorable pre-to-post changes in muscle architecture [fascicle length (P = 0.0007, η2p = .18), pennation angle (P = 0.0004, η2p = .20), and muscle thickness (P = 0.001, η2p = .17)]. Further, the AcVR group revealed a greater increase in peak concentric torque of knee extensors at angular speeds of 120°/sec [right side (P = 0.0032, η2p = .08); left side (P = 0.039, η2p = .07)] and 180°/sec [right side (P = 0.01, η2p = .11); left side (P = 0.014, η2p = .10)]. Furthermore, The AcVR group achieved more conducive changes in functional performance [6-min walk test (P = 0.003, η2p = .15), timed up and down stair test (P = 0.009, η2p = .12), and 4 × 10 m shuttle run test (P = 0.036, η2p = .08)]. Conclusion: A 6-week AcVR training is potentially effective for improving muscle architectural qualities, enhancing peak muscle torque, and boosting functional performance in patients with Juv-IA without experiencing any detrimental side effects.

Chronic low back pain changes the latissmus dorsi and gluteus maximus muscles activation pattern and upward scapular rotation: A cross-sectional study.

BACKGROUND: Patients with chronic low back pain (LBP) have an impaired dynamic spinal stability, which may lead to arm injuries. OBJECTIVES: To examine the latissimus dorsi and gluteus maximus muscles activation pattern and the upward scapular rotation in patients with chronic LBP. METHODS: Sixty-one right-handed males were divided into two groups: chronic LBP group (n= 31) and healthy controls (n= 30). The electromyography (EMG) activities of the right and left latissimus dorsi and gluteus maximus were recorded. The upward scapular rotation in different shoulder positions (neutral, 45∘, 90∘, 135∘ abduction and end range) was measured in both groups. RESULTS: The LBP group has a bilateral significant increased EMG of latissimus dorsi (p< 0.05) and significantly decreased EMG of gluteus maximus (p< 0.05) compared to the control group, without significant differences between the right and left sides (p> 0.05). There was a significant increase in upward scapular rotation in the LBP group relative to the control group in all shoulder abduction positions on both sides. The left side upward scapular rotation was more significant than the right (p< 0.05). CONCLUSION: Chronic LBP increased the latissimus dorsi muscle activities and decreased the gluteus maximus activities. It furthermore increased the upward scapular rotation in different shoulder abduction positions.

Aqua-Plyometric Exercises: Potential Implications for Bone Mineral Density, Functional Capacity, and Quality of Life in Survivors of Childhood Acute Lymphoblastic Leukemia.

OBJECTIVE: This study endeavored to explore the effect of an aquatic-based plyometric exercise program (Aqua-PLYO) on bone mineralization, functional capacity, and quality of life in survivors of childhood acute lymphoblastic leukemia (ALL). DATA SOURCES: In a prospective, single-blinded quasi-experimental study, 30 survivors of childhood ALL (63.3% boys; age: 13.1 ± 2.8 years) were allocated to undergo the Aqua-PLYO exercise program (Aqua-PLYO group; n = 15) or the usual physical therapy (Control group; n = 15). Bone mineralization (bone mineral density [BMD], bone mineral content [BMC], BMD Z-score, and BMD volumetric [BMDvol]), functional capacity, and quality of life were assessed prior to, and following 36 treatment sessions, which were undertaken over nonconsecutive days in a 12-week program. With controlling for the pretreatment values, all measures of bone mineralization, functional capacity, and quality of life showed more favorable posttreatment improvement in the Aqua-PLYO group as compared to the control group (all P < .05). CONCLUSION: The Aqua-PLYO exercises, besides the usual physical therapy, can effectively improve bone health, increase functional capacity, and promote a better quality of life in long-term survivors of childhood ALL. IMPLICATIONS FOR NURSING PRACTICE: Although survivors of childhood ALL experience reduced BMD, functional ability, and quality of life, Aqua-PLYO exercises can have positive effects on survivors' physical and functional disturbances and can, even more, be enjoyable and increase their motivation and interest in engaging in exercise interventions.

Stretch-shortening cycle exercises can efficiently optimize gait-symmetry and balance capabilities in children with unilateral cerebral palsy: A randomized controlled trial.

BACKGROUND: Children with unilateral cerebral palsy (UCP) experience an asymmetrical gait pattern and poor balance capabilities. Effective interventions, therefore, are needed to facilitate remediation of these functional issues. OBJECTIVE: This study was set out to investigate the emerging role of stretch-shortening cycle (SSC) exercises on gait-symmetry and balance in children with UCP. METHODS: In this randomized controlled trial, 42 children with UCP (age; 8 -12 years) were enrolled and received either standard physical rehabilitation (control group; n = 21) or the SSC exercise program plus physical rehabilitation (SSC group; n = 21). Spatial- and temporal-gait symmetry index (GSI) and specific balance capabilities [reactive balance, directional control, movement synchronization, and sensory organization] were assessed before and after 16 sessions that were carried out twice/week over non-sequential days in an 8-week program. RESULTS: Using the pre-treatment scores as covariates, the post-treatment spatial- (P = 0.006; ηp2= 0.17) and temporal- GSI (P < .001; ηp2= 0.46) scores reduced significantly in the SSC group as compared to the control group, suggesting favorable improvement of gait symmetry. Also, all measures of balance (P < 0.05; ηp2 ranged between 0.10 and 0.29) improved remarkably, post-treatment, in SSC group in comparison with the control group. CONCLUSION: The evidence from this study suggests that SSC exercises besides standard physical rehabilitation appear to be effective for improving gait symmetry and boosting balance capabilities in children with UCP.