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Background: Stabilization exercises lead to improve muscle performance and can be used to prevent and treat of low back pain. Objectives: Aim of the present study is to evaluate and compare the level of abdominal and lumbar muscles activity during two types of stabilization exercises. Patients and Methods: Thirty healthy females aged between 20-30 years old participated in this quasi-experimental study. Muscle activity was recorded from Transversus Abdominus (TrA), Internal Oblique (IO) and multifidus on both sides with electromyography (EMG) device during the quadruped and dead bug exercises. EMG data were normalized to the percentage of maximum voluntary isometric contraction and paired t-test was used for statistical analysis. Results: The mean muscle activity in the right arm reach of quadruped and dead bug exercises showed that right IO and TrA muscles produced greater activity during quadruped exercise (P = 0.015, P = 0.001, respectively). The comparison between the mean muscles activity in the left leg reach of two exercises showed that right and left TrA muscles produced greater activity during left leg reach in quadruped exercise (P = 0.005, P = 0.046, respectively). Also, the comparison between the mean muscle activity in simultaneous movements of left leg and right arm reach in the 2 exercises showed that right TrA muscle was activated at a higher level compared to the other muscles in the quadruped exercise (P = 0.002). Conclusions: The results showed quadruped exercise can provide stability, coordination, and smoothness of the movements in healthy subjects and all considered muscles participated in this exercise.

Background: The discharge of uncomplicated patients with ST-segment-elevation myocardial infarction (STEMI) within 48 to 72 hours has been proven safe and feasible. The safety and feasibility of the very early discharge (≤48 h) of such patients, especially during the COVID-19 pandemic with limited bed availability and infection risk, have yet to be evaluated. Methods:  In this cohort study on 108 patients with STEMI who presented to Farshchian Heart Center between February and May 2020, 30 patients received fibrinolysis and 78 were scheduled for emergent coronary angiography. One patient had no coronary obstruction, 3 underwent emergent surgery, and 3 had high-risk features mandating a prolonged stay. The remaining patients were assigned to either Group A (≤48 h) or Group B (>48 h) regarding hospital discharge. Demographic, angiographic, procedural, and outcome data were compared between the 2 groups. Results: Group A consisted of 51 patients, including 7 women (13.7%), at a mean age of 62.74±12.35 years, and Group B comprised 20 patients, including 4 women (20.0%), at a mean age of 65.20±12.82 years. The mean hospital length of stay was 38.02±9.15 hours in Group A and 88.20±23.31 hours in Group B (P<0.001). The mean stent diameter was smaller in Group B (3.19±0.34 mm vs 2.96±0.29 mm; P=0.008). Demographic, angiographic, procedural, and outcome data, including the rates of in-hospital, 1-week, and 1-month mortality, were similar between the 2 groups. Conclusion: This study shows that a hospital discharge in less than 48 hours in low-risk patients with STEMI is safe and feasible. The potential advantages of this approach in the COVID-19 pandemic should be balanced against its risks.

Background: Stabilization exercises lead to improve muscle performance and can be used to prevent and treat of low back pain. Objectives: Aim of the present study is to evaluate and compare the level of abdominal and lumbar muscles activity during two types of stabilization exercises. Patients and Methods: Thirty healthy females aged between 20-30 years old participated in this quasi-experimental study. Muscle activity was recorded from Transversus Abdominus (TrA), Internal Oblique (IO) and multifidus on both sides with electromyography (EMG) device during the quadruped and dead bug exercises. EMG data were normalized to the percentage of maximum voluntary isometric contraction and paired t-test was used for statistical analysis. Results: The mean muscle activity in the right arm reach of quadruped and dead bug exercises showed that right IO and TrA muscles produced greater activity during quadruped exercise (P = 0.015, P = 0.001, respectively). The comparison between the mean muscles activity in the left leg reach of two exercises showed that right and left TrA muscles produced greater activity during left leg reach in quadruped exercise (P = 0.005, P = 0.046, respectively). Also, the comparison between the mean muscle activity in simultaneous movements of left leg and right arm reach in the 2 exercises showed that right TrA muscle was activated at a higher level compared to the other muscles in the quadruped exercise (P = 0.002). Conclusions: The results showed quadruped exercise can provide stability, coordination, and smoothness of the movements in healthy subjects and all considered muscles participated in this exercise.