Pardis Noormohammadpour1, Majid Ansari2, Mohammad Ali Mansournia3, Mohsen Rostami2, Ruhollah Nourian2, Ramin Kordi4. 1. Sports Medicine Research Center, Tehran University of Medical Sciences, No 7, Al-e Ahmad St., Tehran, Iran; Department of Sports and Exercise Medicine, School of Medicine, Tehran University of Medical Sciences, Imam Khomeini Hospital, Bagher Khan St., Chamran Highway, Tehran, Iran. 2. Sports Medicine Research Center, Tehran University of Medical Sciences, No 7, Al-e Ahmad St., Tehran, Iran; Spine Division, Noorafshar Rehabilitation & Sports Medicine Hospital, 17th St., Khodaverdi St., Niavaran, Tehran, Iran. 3. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Poursina St., Shanzdah-e Azar St., Tehran, Iran. 4. Sports Medicine Research Center, Tehran University of Medical Sciences, No 7, Al-e Ahmad St., Tehran, Iran; Spine Division, Noorafshar Rehabilitation & Sports Medicine Hospital, 17th St., Khodaverdi St., Niavaran, Tehran, Iran. Electronic address: ramin_kordi@tums.ac.ir.
Abstract
OBJECTIVES: Low thickness of Transversus Abdominis, Internal Oblique and External Oblique muscles may play a role in development of low back pain. Ultrasonography is increasingly utilized to measure the thickness of these muscles. Prandial state has recently been proposed as a confounding factor in such measurements. We aimed to compare the reversal time of the postprandial thickness of these muscles with preprandial values. The measurement errors of ultrasonographic values were also assessed in both immediate preprandial and postprandial states. DESIGN: Interventional cross-sectional study. METHODS: The ultrasonographic thickness of lateral abdominal muscles was measured at rest and during abdominal drawing-in maneuver in 20 healthy participants before and after consumption of a specific meal. Postprandial ultrasound measurements continued every 15 min until their thickness reached 95% of their preprandial values. RESULTS: There was a statistically significant reduction in postprandial thickness of these muscles (all p-values <0.001 on both sides). The reversal times were 1.5, 1.3 and 1.2 h for Transversus Abdominis, Internal Oblique, and External Oblique muscles, respectively. Standard Error of Measurement and Smallest Detectable Change were in the range of 0.007-0.013 mm and 0.020-0.035 mm, respectively. CONCLUSIONS: To limit the effects of prandial state on the sonographic thickness of lateral abdominal muscles, we recommend measuring these values at least 1.5-2 h after food consumption. For the future studies, controlling the participants according to their prandial state is recommended.
OBJECTIVES: Low thickness of Transversus Abdominis, Internal Oblique and External Oblique muscles may play a role in development of low back pain. Ultrasonography is increasingly utilized to measure the thickness of these muscles. Prandial state has recently been proposed as a confounding factor in such measurements. We aimed to compare the reversal time of the postprandial thickness of these muscles with preprandial values. The measurement errors of ultrasonographic values were also assessed in both immediate preprandial and postprandial states. DESIGN: Interventional cross-sectional study. METHODS: The ultrasonographic thickness of lateral abdominal muscles was measured at rest and during abdominal drawing-in maneuver in 20 healthy participants before and after consumption of a specific meal. Postprandial ultrasound measurements continued every 15 min until their thickness reached 95% of their preprandial values. RESULTS: There was a statistically significant reduction in postprandial thickness of these muscles (all p-values <0.001 on both sides). The reversal times were 1.5, 1.3 and 1.2 h for Transversus Abdominis, Internal Oblique, and External Oblique muscles, respectively. Standard Error of Measurement and Smallest Detectable Change were in the range of 0.007-0.013 mm and 0.020-0.035 mm, respectively. CONCLUSIONS: To limit the effects of prandial state on the sonographic thickness of lateral abdominal muscles, we recommend measuring these values at least 1.5-2 h after food consumption. For the future studies, controlling the participants according to their prandial state is recommended.
Authors: Pardis Noormohammadpour; Alireza Hosseini Khezri; Paweł Linek; Mohammad Ali Mansournia; Alireza Hassannejad; Ali Younesian; Farzin Farahbakhsh; Ramin Kordi Journal: Asian J Sports Med Date: 2016-10-04