Increase in lactate without change in nutritive blood flow or glucose at active trigger points following massage: A randomized clinical trial

Publication date: Available online 6 August 2018

Source: Archives of Physical Medicine and Rehabilitation

Author(s): Albert F. Moraska, Robert C. Hickner, Rachael Rzasa-Lynn, Jay P. Shah, Jonathan R. Hebert, Wendy M. Kohrt

Abstract

Objective

To investigate changes in nutritive blood flow as well as interstitial glucose and lactate within an active myofascial trigger point (MTrP) following massage.

Design

Randomized, placebo-controlled trial.

Setting

Subjects were recruited from the general population; procedures were conducted at a research center affiliated with a university hospital.

Participants

Twenty-five adults (18-49 years old) with episodic or chronic tension-type headache and an active MTrP in the upper trapezius muscle.

Interventions

Subjects were randomized to receive a single trigger point release (TRP) massage or sham ultrasound (US) treatment at an active MTrP in the upper trapezius muscle. Microdialysis was used to continuously sample interstitial fluid from the MTrP before, during, and for 60 min following intervention.

Main Outcome Measures

The primary outcome measure was nutritive blood flow within the MTrP as measured by microdialysis ethanol clearance; secondary measures included dialysate glucose, dialysate lactate, and subject discomfort with the procedures. Pressure-pain threshold (PPT) was determined to assess treatment effectiveness.

Results

There was no treatment effect of TPR massage on nutritive blood flow (p=0.663) or dialysate glucose (p=0.766). The interaction for lactate was significant indicating that dialysate lactate increased for TPR massage versus sham US (p=0.04); maximum lactate increase over baseline was observed at 60 minutes after TPR massage (p=0.007, 0.128 μM, 95% CI 0.045-0.212). Pain evoked by probe placement into an active MTrP was low. An interaction effect on PPT was significant (p= 0.005).

Conclusion

TPR massage of an active MTrP affected anaerobic metabolism as represented by an increase in dialysate lactate without change in nutritive blood flow or dialysate glucose. The lack of a treatment effect on blood flow is discussed.

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