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Original Research

Open Access Special Issue

Effect of hip abduction angle on trunk muscle activation during plank exercise

  • Min-Kyu Kim1
  • Seong-Gil Kim2

1Dawoom Rehabilitation Center, 37596 Pohang, Republic of Korea

2Department of Physical Therapy, College of Health Science, Sun Moon University, 31460 Asan, Republic of Korea

DOI: 10.31083/jomh.2021.122

Submitted: 09 August 2021 Accepted: 13 September 2021

Online publish date: 17 September 2021

*Corresponding Author(s): Seong-Gil Kim E-mail:

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Background and objectives: The purpose of this study was to investigate the effect of hip joint abduction an-gle change on trunk muscle activities during plank exercise.

Materials and methods: This study was conducted with 34 subjects but 4 subjects dropped out during the measurement and 30 subjects completed the study. Muscle activities were measured while performing plank exercise with hip joint abduction angles at 0, 15, 30, or 45 degrees. Electrodes were placed on four muscles: rectus abdominis, external oblique, internal oblique, and erector spinae muscles. Two-way repeated measures ANOVA was used to analyze the interaction between hip joint abduction angle and trunk muscle activities. One-way repeated measures ANOVA was performed to determine trunk muscle activities of each muscle at each hip joint abduction angle. Eta-squared (η2) values were used to determine effect sizes.

Results: A significant interaction was found between hip joint abduction angle and muscle type (p < 0.05). Hip joint abduction angle was significantly associated with rectus abdominis and erector spinae activities (p < 0.05).

Conclusions: When the hip joint is abducted during plank exercise in healthy young adults, the muscle activities of rectus abdominis and erector spinae are inversely proportional to hip joint abduction angles.


Electromyography; Plank exercise; Trunk muscle; EMG; Hip abduction

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Min-Kyu Kim,Seong-Gil Kim. Effect of hip abduction angle on trunk muscle activation during plank exercise. Journal of Men's Health. 2021.doi:10.31083/jomh.2021.122.


[1] Hamilton MT. The role of skeletal muscle contractile duration throughout the whole day: reducing sedentary time and promoting universal physical activity in all people. The Journal of Physiology. 2018; 596: 1331–1340.

[2] Korthuis RJ. Skeletal Muscle Circulation. Colloquium Series on Integrated Systems Physiology: from Molecule to Function. 2011; 3: 1–144.

[3] Genin PM, Dessenne P, Finaud J, Pereira B, Dutheil F, Thivel D, et al. Effect of work-related sedentary time on overall health profile in active vs. inactive office workers. Frontiers in Public Health. 2018; 6: 279.

[4] Sions JM, Beisheim EH, Hoggarth MA, Elliott JM, Hicks GE, Pohlig RT, et al. Trunk Muscle Characteristics: Differences between Seden-tary Adults with and without Unilateral Lower Limb Amputation. Archives of Physical Medicine and Rehabilitation. 2021; 102: 1331–1339.

[5] Kato S, Murakami H, Demura S, Yoshioka K, Shinmura K, Yokogawa N, et al. Abdominal trunk muscle weakness and its association with chronic low back pain and risk of falling in older women. BMC Musculoskeletal Disorders. 2019; 20: 273.

[6] Huxel Bliven KC, Anderson BE. Core stability training for injury prevention. Sports Health. 2013; 5: 514–522.

[7] Gilmer GG, Washington JK, Dugas JR, Andrews JR, Oliver GD. The Role of Lumbopelvic-Hip Complex Stability in Softball Throwing Mechanics. Journal of Sport Rehabilitation. 2019; 28: 196–204.

[8] Zambarano EK, Bouillon L, Glaviano NR. Relationship between lumbopelvic-hip complex stability, muscle activity, and 2-dimensional kinematics of the trunk and lower extremity. Physical Therapy in Sport. 2021; 47: 7–14.

[9] Calatayud J, Casaña J, Martín F, Jakobsen MD, Colado JC, Andersen LL. Progression of Core Stability Exercises Based on the Extent of Muscle Activity. American Journal of Physical Medicine & Rehabili-tation. 2017; 96: 694–699.

[10] Escamilla RF, Lewis C, Pecson A, Imamura R, Andrews JR. Muscle Activation among Supine, Prone, and Side Position Exercises with and without a Swiss Ball. Sports Health. 2016; 8: 372–379.

[11] Ekstrom RA, Donatelli RA, Carp KC. Electromyographic analysis of core trunk, hip, and thigh muscles during 9 rehabilitation exercises. The Journal of Orthopaedic and Sports Physical Therapy. 2007; 37: 754–762.

[12] Lehman GJ, Hoda W, Oliver S. Trunk muscle activity during bridging exercises on and off a Swiss ball. Chiropractic & Osteopathy. 2005; 13: 14.

[13] Cortell-Tormo JM, García-Jaén M, Chulvi-Medrano I, Hernández-Sánchez S, Lucas-Cuevas ÁG, Tortosa-Martínez J. Influence of Scapular Position on the Core Musculature Activation in the Prone Plank Exercise. Journal of Strength and Conditioning Research. 2017; 31: 2255–2262.

[14] Kim S, Kang M, Kim E, Jung I, Seo E, Oh J. Comparison of EMG activity on abdominal muscles during plank exercise with unilateral and bilateral additional isometric hip adduction. Journal of Electromyography and Kinesiology. 2016; 30: 9–14.

[15] Chanthapetch P, Kanlayanaphotporn R, Gaogasigam C, Chiradejnant A. Abdominal muscle activity during abdominal hollowing in four starting positions. Manual Therapy. 2009; 14: 642–646.

[16] Calatayud J, Casaña J, Martín F, Jakobsen MD, Colado JC, Gargallo P, et al. Trunk muscle activity during different variations of the supine plank exercise. Musculoskeletal Science & Practice. 2017; 28: 54–58.

[17] Criswell E. Cram’s introduction to surface electromyography. Jones & Bartlett Publishers. 2010.

[18] Biscarini A, Contemori S, Grolla G. Activation of Scapular and Lumbopelvic Muscles during Core Exercises Executed on a whole-Body Wobble Board. Journal of Sport Rehabilitation. 2019; 28: 623–634.

[19] Czaprowski D, Afeltowicz A, Gębicka A, Pawłowska P, Kędra A, Barrios C, et al. Abdominal muscle EMG-activity during bridge exercises on stable and unstable surfaces. Physical Therapy in Sport. 2014; 15: 162–168.

[20] Byrne JM, Bishop NS, Caines AM, Crane KA, Feaver AM, Pearcey GEP. Effect of using a suspension training system on muscle activation during the performance of a front plank exercise. Journal of Strength and Conditioning Research. 2014; 28: 3049–3055.

[21] Imai A, Kaneoka K, Okubo Y, Shiina I, Tatsumura M, Izumi S, et al. Trunk muscle activity during lumbar stabilization exercises on both a stable and unstable surface. The Journal of Orthopaedic and Sports Physical Therapy. 2010; 40: 369–375.

[22] Sahrmann S, Azevedo DC, Dillen LV. Diagnosis and treatment of movement system impairment syndromes. Brazilian Journal of Physical Therapy. 2017; 21: 391–399.

[23] Fong SSM, Tam YT, Macfarlane DJ, Ng SSM, Bae Y, Chan EWY, et al. Core Muscle Activity during TRX Suspension Exercises with and without Kinesiology Taping in Adults with Chronic Low Back Pain: Implications for Rehabilitation. Evidence-Based Complementary and Alternative Medicine. 2015; 2015: 1–6.

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