Nonlinear time-course of lumbar muscle fatigue using recurrence quantifications

The aim of this study was to investigate the effect of heating and cooling on time course of voluntary and electrically induced muscle force variation. Material and Methods. Ten volunteers performed 50 maximal voluntary and electrically induced contractions of the knee extensors at an angle of 120 degrees under the control conditions and after passive lower body heating and cooling in the control, heating, and cooling experiments. Peak torque, torque variation, and half-relaxation time were assessed during the exercise. Results. Passive lower body heating increased muscle and core temperatures, while cooling lowered muscle temperature, but did not affect core temperature. We observed significantly lower muscle fatigue during voluntary contraction compared with electrically induced contractions. Body heating (opposite to cooling) increased involuntarily induced muscle force, but caused greater electrically induced muscle fatigue. In the middle of the exercise, the coefficient of correlation for electrically induced muscle torque decreased significantly as compared with the beginning of the exercise, while during maximal voluntary contractions, this relation for torque remained significant until the end of the exercise. Conclusion. It was shown that time course of voluntary contraction was more stable than in electrically induced contractions.

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Time course of trunk extensor muscle fatigue as measured using dynamometry and electromyography

Isokinetics and Exercise Science ◽

10.3233/ies-2007-0277 ◽

2007 ◽

Vol 15 (3) ◽

pp. 225-231 ◽

Cited By ~ 1

Author(s):

Sala Abdalla ◽

Alison H. McGregor ◽

Paul H. Strutton

Keyword(s):

Muscle Fatigue ◽

Time Course ◽

Extensor Muscle ◽

Trunk Extensor

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Validity and everyday clinical applicability of lumbar muscle fatigue assessment methods in patients with chronic non-specific low back pain: a systematic review

Disability and Rehabilitation ◽

10.3109/09638288.2015.1107777 ◽

2016 ◽

Vol 38 (19) ◽

pp. 1859-1871 ◽

Cited By ~ 14

Author(s):

Jorge H. Villafañe ◽

Massimiliano Gobbo ◽

Matteo Peranzoni ◽

Ganesh Naik ◽

Grace Imperio ◽

...

Keyword(s):

Systematic Review ◽

Low Back Pain ◽

Back Pain ◽

Muscle Fatigue ◽

Assessment Methods ◽

Low Back ◽

Fatigue Assessment ◽

Clinical Applicability ◽

Lumbar Muscle

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A newly developed floor chair placed on an office chair reduces lumbar muscle fatigue by cyclically changing its lumbar supporting shape

Journal of Physical Therapy Science ◽

10.1589/jpts.29.1649 ◽

2017 ◽

Vol 29 (9) ◽

pp. 1649-1652

Author(s):

Tadamitsu Matsuda ◽

Takayuki Koyama ◽

Yasushi Kurihara ◽

Miki Tagami ◽

Yasuaki Kusumoto ◽

...

Keyword(s):

Muscle Fatigue ◽

Lumbar Muscle ◽

Office Chair

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The effects of priming exercise on the V̇O2 slow component and the time-course of muscle fatigue during very-heavy-intensity exercise in humans

Applied Physiology Nutrition and Metabolism ◽

10.1139/apnm-2017-0769 ◽

2018 ◽

Vol 43 (9) ◽

pp. 909-919 ◽

Cited By ~ 4

Author(s):

Paulo Cesar do Nascimento Salvador ◽

Kristopher Mendes de Souza ◽

Ricardo Dantas De Lucas ◽

Luiz Guilherme Antonacci Guglielmo ◽

Benedito Sérgio Denadai

Keyword(s):

Muscle Fatigue ◽

Time Course ◽

Slow Component ◽

Peak Torque ◽

Fixed Amount ◽

Prior Exercise ◽

Before And After ◽

Priming Exercise ◽

Male Subjects ◽

Exercise In Humans

We hypothesized that prior exercise would attenuate the muscle fatigue accompanied by oxygen uptake slow-component (V̇O2SC) behavior during a subsequent very-heavy (VH)-intensity cycling exercise. Thirteen healthy male subjects performed tests to determine the critical power (CP) and the fixed amount of work above CP ([Formula: see text]) and performed 6 square-wave bouts until 3 or 8 min, each at a work rate set to deplete 70% [Formula: see text] in 8 min, with a maximal isokinetic effort before and after the conditions without (VHCON) and with prior exercise (VHEXP), to measure the cycling peak torque decrement. The V̇O2SC magnitude at 3 min (VHCON = 0.280 ± 0.234, VHEXP = 0.116 ± 0.109 L·min−1; p = 0.04) and the V̇O2SC trajectory were significantly lower for VHEXP (VHCON = 0.108 ± 0.042, VHEXP = 0.063 ± 0.031 L·min−2; p < 0.01), leading to a V̇O2SC magnitude at the eighth minute that was significantly lower than VHCON (VHCON = 0.626 ± 0.296 L·min−1, VHEXP = 0.337 ± 0.179; p < 0.01). Conversely, peak torque progressively decreased from pre-exercise to 3 min (Δtorque = 21.5 ± 7.7 vs. 19.6 ± 9.2 Nm) and to 8 min (Δtorque = 29.4 ± 15.8 vs. 27.5 ± 12.0 Nm) at VHCON and VHEXP, respectively, without significant differences between conditions. Regardless of the condition, there was a significant relationship between Δtorque and the V̇O2SC (R2: VHCON = 0.23, VHEXP = 0.25; p = 0.01). Considering that “priming” effects on the V̇O2SC were not accompanied by the muscle force behavior, these findings do not support the hypothesis of a “causal” relationship between the time-course of muscle fatigue and V̇O2SC.

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