Reliability of the muscle strength measurement and effects of the strengthening by an innovative exercise device for the abdominal trunk muscles

Abstract

OBJECTIVE:

We developed an innovative exercise device for the abdominal trunk muscles (ATMs) that has a built-in system to measure muscle strength. We aimed to examine the reliability of the strength measurement as well as the effect of strengthening using the device.

METHODS:

Twenty healthy adults participated in a reliability study of the muscle strength measurement. The first and second measurement were done in one day with an hour rest interval by raters 1 and 2, and the third by rater 1 following a one-week interval. We calculated the intraclass correlation coefficient (ICC). Another seven healthy men participated in a training program using the device, consisting of strengthening twice a week for 5 weeks. ATM strength was measured before and after the training period, and a positron emission tomography (PET) scan series was performed, consisting of examinations during rest before training (control condition) and during exercise after training (training condition).

RESULTS:

The intra-rater (ICC $=$ 0.95) and inter-rater (ICC $=$ 0.99) reliability of the strength measurement were excellent. ATM strength was significantly higher after training than before. ${}^{18}$ F-fluorodeoxyglucose accumulation within the diaphragm, abdominal rectus, abdominal external and internal oblique, transverse abdominal, and levator ani muscles was significantly higher in the training condition than in the control.

CONCLUSIONS:

Our innovative device showed excellent reliability to quantify ATM strength. Strengthening using the device increased strength and activated the abdominals, diaphragm, and pelvic floor muscles.

Keywords

Abdominal trunk muscle innovative exercise device muscle strength measurement strengthening exercise

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References

Dagenais

Caro

Haldeman

. A systematic review of low back pain cost of illness studies in the United States and internationally. Spine J. 2008; 8(1): 8-20.

Poitras

Brosseau

. Evidence-informed management of chronic low back pain with transcutaneous electrical nerve stimulation, ultrasound, and thermotherapy. Spine J. 2008; 8(1): 226-233.

Bronfort

Haas

Evans

Kawchuk

Dagenais

. Evidence-informed management of chronic low back pain with spinal manipulation and mobilization. Spine J. 2008; 8(1): 213-225.

Standaert

Weinstein

Rumpeltes

. Evidence-informed management of chronic low back pain with lumbar stabilization exercises. Spine J. 2008; 8(1): 114-120.

Mayer

Mooney

Dagenais

. Evidence-informed management of chronic low back pain with lumbar extensor strengthening exercises. Spine J. 2008; 8(1): 96-113.

Slade

Keating

. Trunk strengthening exercises for chronic low back pain: a systematic review. J Manipulative Physiol Ther. 2006; 29(2): 163-173.

Oesch

Kool

Hagen

Bachmann

. Effectiveness of exercise on work disability in patients with nonacute nonspecific low back pain: systematic review and meta-analysis of randomized controlled trials. J Rehabil Med. 2010; 42(3): 193-205.

Dagenais

Tricco

Haldeman

. Synthesis of recommendations for the assessment and management of low back pain from recent clinical practice guidelines: review. Spine J. 2010; 10(6): 514-529.

Hayden

van Tulder

Tomlinson

. Systematic review: Strategies for using exercise therapy to improve outcomes in chronic low back pain. Ann Intern Med. 2005; 142(9): 776-785.

10.

Phillips

Schneider

Mercer

. Motivating elder to initiate and maintain exercise. Arch Phys Med Rehabil. 2004; 85(Suppl 3): S52-57.

11.

Rudy

Weiner

Lieber

Slaboda

Boston

. The impact of chronic low back pain on older adults: a comparative study of patients and controls. Pain. 2007; 131(3): 293-301.

12.

Coyle

Velasco

Sions

Hicks

. Lumbar mobility and performance-based function: an investigation in older adults with and without chronic low back pain. Pain Med. 2017; 18(1): 161-168.

13.

Kavcic

Grenier

McGill

. Determining the stabilizing role of individual torso muscles during rehabilitation exercise. Spine (Phila Pa 1976). 2004; 29(11): 1254-1265.

14.

Nakase

Inaki

Mochizuki

Toratani

Kosaka

Ohashi

, et al. Whole body muscle activity during the FIFA 11+ program evaluated by positron emission tomography. PLoS One. 2013; 8(7): e73898.

15.

Numata

Nakase

Inaki

Mochizuki

Oshima

Takata

, et al. Effects of the belt electrode skeletal muscle electrical stimulation system on lower extremity skeletal muscle activity: Evaluation using positron emission tomography. J Orthop Sci. 2016; 21(1): 53-56.

16.

Kemppainen

Fujimoto

Kalliokoski

Viljanen

Nuutila

Knuuti

. Myocardial and skeletal muscle glucose uptake during exercise in humans. J Physiol. 2002; 542: 403-412.

17.

Pappas

Olcott

Drace

. Imaging of skeletal muscle function using (18) FDG PET: force production, activation, and metabolism. J Physiol. 2002; 542(Pt 2): 403-412.

18.

Gunnarsson

Johansson

Strigård

. Assessment of abdominal muscle function using the Biodex System-4. Validity and reliability in healthy volunteers and patients with giant ventral hernia. Hernia. 2011; 15(4): 417-421.

19.

Jensen

Kjaer

Jorgensen

. Isometric abdominal wall muscle strength assessment in individuals with incisional hernia: a prospective reliability study. Hernia. 2016(6); 20: 831-837.

20.

Cohen

. Statistical power analysis for the behavioral science (2nd ed). 1988, Hillsdale, NJ: Lawrence Erlbaum Associaes.

21.

Karthikbabu

Chakrapani

. Hand-held dynamometer is a reliable tool to measure trunk muscle strength in chronic stroke. J Clin Diagn Res. 2017; 11(9): YC09-YC12.

22.

Romero-Cullerés

Peña-Pitarch

Jané-Feixas

Arnau

Montesinos

Abenoza-Guardiola

. Intra-rater reliability and diagnostic accuracy of a new vaginal dynamometer to measure pelvic floor muscle strength in women with urinary incontinence. Neurourol Urodyn. 2017; 36(2): 333-337.

23.

Richardson

Jull

. Muscle control-pain control. What exercises would you prescribe? Man Ther. 1995; 1(1): 2-10.

24.

Akuthota

Ferreiro

Moore

Fredericson

. Core stability exercise principle. Curr Sports Med Rep. 2008; 7(1): 39-44.

25.

Richardson

Snijders

Hides

Damen

Pas

Storm

. The relation between the transversus abdominis muscles, sacroiliac joint mechanics, and low back pain. Spine (Phila Pa 1976). 2002; 27(4): 399-405.

26.

McGill

. Low Back Disorders: Evidence-Based Prevention and Rehabilitation. Champaign, IL: Human Kinetics, 2002.

27.

Grenier

McGill

. Quantification of lumbar stability by using 2 different abdominal activation strategies. Arch Phys Med Rehabil. 2007; 88(1): 54-62.

28.

Vera-Garcia

Elvira

Brown

McGill

. Effect of abdominal stabilization maneuvers on the control of spine motion and stability against sudden trunk perturbations. J Electromyogr Kinesiol. 2007; 17(5): 556-567.

29.

Akuthota

Nadler

. Core strengthening. Arch Phys Med Rehabil. 2004; 85(3 Suppl 1): 86-92.

30.

Koh

Cho

Kim

. Comparison of the effects of hollowing and bracing exercises on cross-sectional areas of abdominal muscles in middle-aged women. J Phys Ther Sci. 2014; 26(2): 295-299.

31.

Tayashiki

Takai

Maeo

Kanehisa

. Intra-abdominal pressure and trunk muscular activities during abdominal bracing and hollowing. Int J Sports Med. 2016; 37(2): 134-43.

32.

Okubo

Kaneoka

Imai

Shiina

Tatsumura

Izumi

Miyakawa

. Electromyographic analysis of transversus abdominis and lumbar multifidus using wire electrodes during lumbar stabilization exercise. J Orthop Sports Phys Ther. 2010; 40(11): 743-750.