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Daily Archives: July 26, 2016

Effect of Two Consecutive Spinal Manipulations in a Single Session on Myofascial Pain Pressure Sensitivity

By |July 26, 2016|Myofascial Trigger Points|

Effect of Two Consecutive Spinal Manipulations in a Single Session on Myofascial Pain Pressure Sensitivity: A Randomized Controlled Trial

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SOURCE:   J Can Chiropr Assoc. 2016 (Jun); 60 (2): 137–145

Michelle A. Laframboise, BKin (Hons), DC, FRCCSS(C),
Howard Vernon, BA, DC, PhD, and
John Srbely, BSc, DC, PhD

Canadian Memorial Chiropractic College,
6100 Leslie Street,
Toronto, Canada;
Division of Graduate Studies,
Sports Sciences,
Canadian Memorial Chiropractic College.


OBJECTIVE:   To investigate the summative effect of two consecutive spinal manipulative therapy (SMT) interventions within the same session on the pain pressure sensitivity of neurosegmentally linked myofascial tissues.

METHODS:   26 participants were recruited and assessed for the presence of a clinically identifiable myofascial trigger point in the right infraspinatus muscle. Participants were randomly assigned to test or control group. Test group received two consecutive real cervical SMT interventions to C5-C6 segment while controls received one real SMT followed by one validated sham SMT intervention to C5-C6 segment. Participants received the two consecutive SMT interventions 30 minutes apart. Pain pressure threshold (PPT) readings were recorded at pre-SMT1 and 5, 10, 15, 20 and 25 minutes post-SMT1 and post-SMT2. PPT readings were normalized to pre-SMT1 values and averaged.

RESULTS:   Repeated measures ANOVA demonstrated a significant main effect of SMT intervention [F(1,24)=8.60, p<0.05] but not group [F(1.24)=0.01] (p=0.91). Post-hoc comparisons demonstrated a statistically significant (p<0.05) increase in SMT2 versus SMT1 (18%) in the test group but not in controls (4%) (p=0.82).

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