Correlation between electromyographic spectral changes and subjective assessment of lumbar muscle fatigue in subjects without pain from the lower back

      This paper is only available as a PDF. To read, Please Download here.

      Abstract

      Objective. The purpose of this study was to correlate objective measurements of muscle fatigue in the lower back to the subject's own assessment of fatigue.
      Design. Muscle fatigue in the lower back was assessed in healthy subjects using electromyography (EMG), endurance time and the Borg scale.
      Background. Muscle fatigue, measured with EMG and endurance time, in the lower back, is significant for patients with pain in the lower back.
      Methods. Fifty healthy subjects participated. EMG was detected from the lumbar extensor muscles during a modified Sørensen's test, an isometric contraction for the back extensors until exhaustion. During the test, subjects rated their subjective fatigue on a Borg CR-10 scale.
      Results. Borg scale ratings correlated with endurance time (0.68) and EMG median- and mean power frequency slopes (0.41–0.50). At a Borg rating of 3, median- and mean power frequency and endurance time were reduced by 30%. At a Borg rating of 5, median- and mean power frequency and endurance time were reduced by 50%. At a Borg rating of 7, median- and mean power frequency and endurance time were reduced by 60–70%.
      Conclusions. Significant correlation between the Borg scale, EMG and endurance time suggests a close relationship between subjective and objective assessment of muscle fatigue.

      Keywords

      To read this article in full you will need to make a payment
      Subscribe to Clinical Biomechanics
      Already a print subscriber? Claim online access
      Already an online subscriber? Sign in
      Institutional Access: Sign in to ScienceDirect

      References

      1. Ciba Foundation Symposia. 5th edn. Human muscle fatigue: physiological mechanisms. vol. 82. Pitman Medical Ltd, London1981
        • Biering-Sørensen F
        Physical measurements as risk indicators for low-back trouble over a one-year period.
        Spine. 1984; 9: 106-119
        • Jørgensen K
        • Nicolaisen T
        Trunk extensor endurance: determination and relation to low-back trouble.
        Ergonomics. 1987; 30: 259-267
        • Bigland-Ritchie B
        • Woods JJ
        Changes in muscle contractile properties and neural control during human muscular fatigue.
        Muscle and Nerve. 1984; 7: 691-699
        • Basmajian JV
        • De Luca CJ
        Muscles alive.
        5th edn. Williams & Wilkins, Baltimore1985
      2. De Luca CJ, Knaflitz M. Surface electomyography: what's new? Torino: C.L.U.T.

        • De Luca CJ
        Use of surface EMG signal for performance evaluation of back muscles.
        Muscle & Nerve. 1993; 16: 210-216
        • Biedermann HJ
        • Shanks GL
        • Forrest WJ
        • Inglis J
        Power spectrum analyses of electromyographic activity.
        Spine. 1991; 16: 1179-1184
        • Klein AB
        • Snyder-Mackler L
        • Roy SH
        • De Luca CJ
        Comparison of spinal mobility and isometric trunk extensor forces with electromyographic spectral analysis in identifying low back pain.
        Physical Therapy. 1991; 71: 445-454
        • Roy SH
        • De Luca CJ
        • Casavant DA
        Lumbar muscle fatigue and chronic lower back pain.
        Spine. 1989; 14: 992-1001
        • Roy SH
        • De Luca CJ
        • Snyder-Mackler L
        • Emley MS
        • Crenshaw RL
        • Lyons JP
        Fatigue, recovery and low back pain in varsity rowers.
        Medicine and Science in Sports and Exercise. 1990; 22: 463-469
        • Roy SH
        • De Luca CJ
        • Emley M
        • Buijs RJC
        Spectral electromyographic assessment of back muscles in patients with low back pain undergoing rehabilitation.
        Spine. 1995; 20: 38-48
        • Mayer TG
        • Kondraske G
        • Mooney V
        • Carmichael TW
        • Butsch R
        Lumbar myoelectric spectral analysis for endurance assessment.
        Spine. 1989; 14: 986-991
        • Moffroid MT
        • Haugh LD
        • Haig AJ
        • Henry SM
        • Pope MH
        Endurance training of trunk extensor muscles.
        Physical Therapy. 1993; 73: 3-10
        • Thompson DA
        • Biedermann H-J
        • Stevenson JM
        • MacLean AW
        Changes in paraspinal electromyographic spectral analysis with exercise: two Studies.
        Journal of Electromyography and Kinesiology. 1992; 2: 179-186
        • Brooke MH
        • Miller R
        Fatigue testing.
        Muscle and Nerve. 1990; (Suppl): 35-37
      3. 1st edn. Psychological aspects and physiological correlates of work and fatigue. vol. 1. Springfield, Illinois1976
        • Borg G
        Psychophysical scaling with applications in physical work and the perception of exertion.
        Scandinavian Journal of Work Environment and Health. 1990; 16: 55-58
        • Tho KS
        • Némelh G
        • Lamontagne M
        • Eriksson E
        Electromyographic analysis of muscle fatigue in anterior cruciate ligament deficient knees.
        Clinical Orthopaedics and Related Research. 1997; 00: 142-151
        • Dedering Å
        • Németh G
        • Harms-ringdahl K
        Electromyographic spectral changes correlate with subjective assessment of lumbar muscle fatigue.
        in: Hermens HJ Nene AV Zilvold G The 11th Congress of the International Society of Electrophysiology and Kinesiology. Roessingh Research & Development B.V, The Netherlands1996: 190-191
        • Hultman G
        Backhealthy men, 45–55 years old, their characteristics and environment compared to men with intermittent and chronic low back pain.
        in: 2nd. ed. Doctoral dissertation. Karolinska Institute, Stockholm1993
        • Borg G
        A category scale with ratio properties for intermodal and interindividual comparisons.
        in: Geissler HG Petzold P Psychophysical judgement and the process of perception. VEB, Berlin1982: 25-34
        • Frändin K
        • Grimby G
        Assessment of physical activity, fitness and performance in 76-year-olds.
        Scandinavian Journal of Medicine and Science in Sports. 1994; 4: 41-46
        • Harms-Ringdahl K
        • Brodin H
        • Eklund L
        • Borg G
        Discomfort and pain from loaded passive joint structures.
        Scandinavian Journal of Rehabilitation Medicine. 1983; 15: 205-211
        • Kankaanpää M
        • Taimela S
        • Webber CL
        • Airaksinen O
        • Hänninen O
        Lumbar paraspinal muscle fatiguability in repetitive isoinertial loading: EMG spectral indices, Borg scale and endurance time.
        European Journal of Applied Physiology. 1997; 76: 236-242
        • Thorstensson A
        • Carlsson H
        Fibre types in human lumbar muscles.
        Acta Physiologica Scandinavia. 1987; 131: 195-202
        • Oddson L
        • Moritani T
        • Andersson E
        • Thorstensson A
        Differences between males and females in EMG and fatiguability of lumbar back muscles.
        Electromyographical Kinesiology. 1991; 00: 295-298
        • Németh G
        • Ohlsén H
        In vivo moment arm lengths for hip extensor muscles at different angles of hip flexion.
        Journal of Biomechanics. 1985; 18: 129-140
        • Sparto PJ
        • Parnianour M
        • Reinsel TE
        • Simon S
        Spectral and temporal responses of trunk extensor electromyography to an isometric endurance test.
        Spine. 1997; 22: 418-426
        • Moffroid M
        • Reid S
        • Henry SM
        • Haugh LD
        • Ricamato A
        Some endurance measures in persons with chronic low back pain.
        Journal of Orthopaedic Sports Physical Therapy. 1994; 20: 81-87
        • Saltin B
        • Grimby G
        Physiological analysis of middle-aged and old former athletes.
        Circulation. 1968; 38: 1104-1115