A preliminary study of the effects of a single session of Swedish massage on hypothalamic-pituitary-adrenal and immune function in normal individuals.
Level 3 - non-randomized controlled study
Controlled comparative trial without explicit mention of randomization in the abstract
PubMed 20809811 · doi:10.1089/acm.2009.0634
What was done
Healthy adults aged 18 to 45 participated in a head-to-head trial comparing a 45-minute session of Swedish Massage Therapy against a light touch control condition using specified protocols in an academic outpatient research unit. Serial blood measurements assessed pre- to post-intervention changes in oxytocin, arginine-vasopressin (AVP), adrenocorticotropic hormone (ACTH), cortisol (CORT), circulating lymphocyte markers (CD25+, CD56+, CD4+, CD8+), and mitogen-stimulated cytokine production.
What was found
Compared to light touch, Swedish massage led to: - A large effect size decrease in AVP and a small effect size decrease in CORT, not mediated by oxytocin. - An increase in circulating lymphocytes and subsets (CD25+, CD56+, CD4+, CD8+) with effect sizes from 0.14 to 0.43. - A decrease in mitogen-stimulated IL-1ß, IL-2, IL-4, IL-5, IL-6, IL-10, IL-13, and IFN-γ (effect sizes -0.22 to -0.63). - Decreased IL-4, IL-5, IL-10, and IL-13 levels relative to baseline. The abstract provides effect size ranges but does not report the participant count, absolute values, variance, or p-values.
Why it matters
This study provides preliminary evidence that a single session of Swedish massage induces acute neuroendocrine and immune shifts distinct from light touch.
Limits
The sample size is omitted in the abstract, and randomization is not explicitly stated. The study examined only a single acute session in healthy young-to-middle-aged adults, so clinical relevance and long-term effects remain unmeasured.
Cited by
- contradicts Casual physical touch in men increases oxytocin and vasopressin levels.