---

Background and Objective: Alpha lipoic acid (ALA) is a powerful biological antioxidant which is involved in metabolism and energy production as a co-factor in mitochondrial dehydrogenase enzyme complex. This study was done to evaluate the effect of aerobic exercise and alpha lipoic acid supplement on insulin resistance in females with type 2 diabetes. Methods: In this quasi-experimental study, 44 females with type 2 diabetes divided into four groups including: control, supplementation, training and supplementation + training groups. Patients of supplementation and complex (supplementation + training) groups took three 100mg ALA capsules per day for eight weeks. The training program consisted of 8 weeks and three sessions per week. In each session, the subjects warmed up for 10-15 minutes, ran on a treadmill with the intensity of 40-50% of maximum heart rate for 30 minutes and then cooled down for 5-10 minutes. Blood samples were taken after 12-14 hours fasting in two stages - the beginning and the end of the eighth week. Results: Eight weeks of taking ALA supplements significantly reduced patients' insulin resistance (P<0.05). Eight weeks of running on a treadmill with an intensity of 40-50% of maximum heart rate non-significantly reduced insulin resistance in the training group compared to the controls. In the supplementation + training group a significant reduction of insulin resistance was observed (P<0.05). Conclusion: Alpha lipoic acid supplementation reduces insulin and insulin resistance. While, reduction in fasting blood glucose level causes reduction in insulin resistance in the combination of supplementation and training.

---

Background and Objective: Musculoskeletal disorder is a professional disease which is due to undesirable work condition and is a disturbing factor of health and welfare in societies. This study was carried out to determine the prevalence of musculoskeletal disorders in nurses and its relationship with the knowledge of ergonomic and environmental factors in north of Iran. Methods: This descriptive-analytic study was carried out on 110 nursing staff in Razi and Imam Khomeini hospitals in north of Iran. Questionnaire of the rate of awareness measurement, general questionnaire of musculoskeletal diseases (Nordik), the questionnaires of the health status and the study relationships between some factors in work place were filled out for each nurse. Results: Prevalence of the pain in neck, back, low back, shoulder, knee, thing pain, arm, leg among nurses was 50%, 49%, 58%, 44.9%, 47.3%, 32.7%, 36.4% and 56.4%, respectively. The condition of work place including air filtration (23.6%), light (22.7%) and air condition (4.5%) was not well. Chair (31%) and work table (34%) for work condition and body position of nurses was unsuitable. There was a significant relationship between low back pain and age and time of working per week of nurses (P<0.05). Nurses knowledge in the filed ergonomy was 77% and 22.2% of nurses trained in body condition during work. 60% of nurses were not trained for correct patient transportation and relocation. Conclusion: Nurses suffered more from pain in low back, knee, neck and legs. Training of nurses for patient transportation and body position during working in hospital is essential.