Relationship between erector spinae muscle oxygenation via in vivo near infrared spectroscopy and static endurance time in healthy males

Abstract

The purpose of the study was to confirm the trends in right and left side muscle blood volume (Mbv) and muscle oxygenation (Mox) during the Biering-Sorensen muscular endurance (BSME) test, compare right and left side Mbv and Mox responses, and predict BSME time via Mox variables. Research suggests that during moderate intensity (approximately 20% of maximal volitional contraction) muscle contraction blood flow will decrease as a result of increased intramuscular pressure. Moreover, decreased muscle oxygenation is believed to be associated with diminished musculoskeletal endurance time, but until the development of near infrared spectroscopy (NIRS) it was not possible to non-invasively monitor these changes in erector spinae muscle. Nineteen healthy males completed the BSME in a prone position. The NIRS probes were placed on the left and right erector spinae muscle at the third lumbar vertebra level. The test protocol was: 2 min resting baseline, BSME to volitional fatigue, and 4 min recovery. The results indicated Mbv initially increased reaching asymptote before returning to baseline at termination. The Mox increased then declined systematically until BSME termination, returning to near baseline in recovery. No significant difference between sides was noted for Mbv or Mox. Mox best predicted BSME time. In conclusion, Mbv increased and then reaches asymptote as indicated in previous research, and oxygen availability was associated with the duration of erector spinae static contraction. Thus, prolonged static postures using the erector spinae muscles may diminish muscle oxygenation increasing susceptible to fatigue and injury.

Muscle-Specific Endurance of the Lower Back Erectors Using Electrical Twitch Mechanomyography

“…Compared to a sustained isometric contraction, the electrical stimulation twitch protocols produced little or no decrease in oxygen levels compared to the resting values. Several previous studies have measured changes in oxygen levels to the Biering-Sorensen test [23][24][25]. These studies found sustained isometric exercise lowered oxygen levels, although the results seemed to vary between subjects.…”

Fatigue sensation, electromyographical and hemodynamic changes of low back muscles during repeated static contraction

“…A decrease in Oxy-hb and/or an increase in Deoxy-hb indicates opposite conditions, which may be seen in fatiguing phase. In this experiment, the spectroscope had one probe and two detectors with rubber shields which were fixed to the skin on the right side of the ESM at the level of L3, 3 cm from the vertebral column using a sticky gel sheet (Dieën et al 2009;Kell et al 2004;Kell and Bhambhani 2008). All EMG, NIRS, and load cell data was collected with a cable telemetric system at a 1,000 Hz sampling rate using the TEAC LX-10 series recorder (TEAC Corporation, Tokyo, Japan).…”

Effects of Kinesio® Tape in low back muscle fatigue: Randomized, controlled, doubled-blinded clinical trial on healthy subjects

“…The re-224 searcher was positioned so that his line of vision was 225 aligned with the axis of the inclinometer needle. In or-226 der to ensure the test was a true measure of resistance 227 to fatigue the researcher gave constant verbal motiva-228 tion to maintain neutral spinal alignment, or "0" on the 229 inclinometer [15,54,65]. However at no point was ei-230 ther the researcher or participant aware of the amount 231 of time that had passed [54], as this has been shown to 232 be a factor directly influencing test results [8,12].…”