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KMID : 1142420200180010035
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PNF and Movement
2020 Volume.18 No. 1 p.35 ~ p.44
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Effect of PNF Leg Flexion Pattern on Muscle Activity of Ipsilateral Trunk and Leg with and without Abdominal Drawing-in Maneuver
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Ahn Su-Hong
Lee Su-Kyong
Jo Hyun-Dai
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Abstract
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Purpose: The purpose of this study was to investigate the effect of the simultaneous abdominal drawing-in maneuver (ADIM) on the muscle activity of the ipsilateral trunk and leg during proprioceptive neuromuscular facilitation (PNF) leg flexion, adduction, and external rotation with knee flexion (D1) patterns.
Methods: The participants were 20 healthy adult males and females (18 males and 2 females). The maneuvers were performed by a physical therapist who fully understands the PNF leg patterns (D1) and their application in clinical practice. The participants were trained and allowed to practice for 15 minutes prior to applying ADIM, to ensure adequate learning as evidenced by the pressure biofeedback unit. In this study, we measured the muscle activity of the trunk and leg when the PNF leg pattern (D1) was performed by the physical therapist either sustaining or releasing the ADIM. Muscle activity was measured on the right transverse abdominis muscle (TRA), the external abdominal oblique muscle (EO), the internal abdominal oblique muscle (IO), the erector spinae muscle (ES), the vastus medialis oblique muscle (VMO), the vastus lateralis oblique muscle (VLO), and the tibialis anterior muscle (TA) and compared using the mean values from averaging three repeated measurements.
Results: The muscle activity of the transversus abdominis, the external abdominal oblique, the internal abdominal oblique, the vastus medialis oblique, and the vastus lateralis oblique was significantly greater (p ? 0.05), and the muscle activity of the erector spinae was significantly less (p ? 0.05) during PNF leg pattern (D1) when the ADIM contraction was sustained compared to when it was not.
Conclusion: These results suggest that sustaining ADIM during PNF leg pattern (D1) training increases the trunk and leg muscle activity, resulting in more effective training.
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KEYWORD
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PNF (proprioceptive neuromuscular facilitation), Abdominal drawing-in maneuver (ADIM), Biofeedback unit, Muscle activity
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