Weighted compression linked to increased respiratory effort after physical exercise
According to a study published in Scientific reports. The results are based on model scenarios of different types of compression tested in 17 healthy volunteers.
Mark Campbell and his colleagues studied the combined effects of physical exertion, prone position (lying down), restraint and body compression on breathing and air distribution in the lungs by testing 17 volunteers in different experimental conditions. As part of the experiments, volunteers exercised on a stationary bike at 70% of their maximum heart rate for three minutes before being asked to lie on their stomachs with their arms in one of three positions: sideways (control), or tight in the lower back or back of the head (restraint positions). The authors compared post-exercise positions with and without the addition of a sand-bagged weight that represented 35% of the volunteers’ body weight between their shoulder blades.
The authors found that the volume of air remaining in the lungs after exhalation was smaller under the combined effects of weight, exercise, and lying down. The remaining air volume continued to decrease throughout post-exercise recovery for the subjects in the restraining position, but not for the control position, suggesting that breathing required more effort in the subjects. held back, possibly because their abdominal muscles were needed to help their inspiratory muscles. The authors suggest that, since the measured weight of 35% of body weight is likely less than the weight that an officer should apply to control a suspect, under actual conditions of weighted restraint, the increased effort to breathe may become relevant to the patient. child survival. subject more weight is applied.
Campbell, M., et al. (2021) Chest weighting of immobilized subjects during exhaustion recovery causes loss of lung reserve volume in a police arrest model. Scientific reports. doi.org/10.1038/s41598-021-94157-w.