bibliography*The PainScience Bibliography contains plain language summaries of thousands of scientific papers and others sources, like a specialized blog. This page is about a single scientific paper in the bibliography, Nicol 2015.

Curcumin “likely” reduces muscle soreness after exercise

updated Nov 30, 2015

Tags: nutrition, DOMS, good news, self-treatment, treatment, exercise, inflammation, pain problems, muscle

PainSci summary of Nicol 2015?This page is one of thousands in the PainScience.com bibliography. It is not a general article: it is focused on a single scientific paper, and it may provide only just enough context for the summary to make sense. Links to other papers and more general information are provided at the bottom of the page, as often as possible. ★★★☆☆?3-star ratings are for typical studies with no more (or less) than the usual common problems. Ratings are a highly subjective opinion, and subject to revision at any time. If you think this paper has been incorrectly rated, please let me know.

Curcumin “exerts potent anti-inflammatory effects.” In this study, “curcumin caused moderate to large reductions in pain” in 17 men with very sore leg muscles. It also helped some aspects of strength loss. The effect size here passes the “impress me” test. These results constitute the only really good science news about any kind of treatment for delayed-onset muscle soreness. Now it just needs to be replicated.

Note that curcumin is poorly absorbed without other agents such as black pepper extract (piperine).

~ Paul Ingraham

original abstract†Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.

INTRODUCTION: Oral curcumin decreases inflammatory cytokines and increases muscle regeneration in mice.

PURPOSE: To determine effects of curcumin on muscle damage, inflammation and delayed onset muscle soreness (DOMS) in humans.

METHOD: Seventeen men completed a double-blind randomized-controlled crossover trial to estimate the effects of oral curcumin supplementation (2.5 g twice daily) versus placebo on single-leg jump performance and DOMS following unaccustomed heavy eccentric exercise. Curcumin or placebo was taken 2 d before to 3 d after eccentric single-leg press exercise, separated by 14-d washout. Measurements were made at baseline, and 0, 24 and 48-h post-exercise comprising: (a) limb pain (1-10 cm visual analogue scale; VAS), (b) muscle swelling, (c) single-leg jump height, and (d) serum markers of muscle damage and inflammation. Standardized magnitude-based inference was used to define outcomes.

RESULTS: At 24 and 48-h post-exercise, curcumin caused moderate-large reductions in pain during single-leg squat (VAS scale -1.4 to -1.7; 90 %CL: ±1.0), gluteal stretch (-1.0 to -1.9; ±0.9), squat jump (-1.5 to -1.1; ± 1.2) and small reductions in creatine kinase activity (-22-29 %; ±21-22 %). Associated with the pain reduction was a small increase in single-leg jump performance (15 %; 90 %CL ± 12 %). Curcumin increased interleukin-6 concentrations at 0-h (31 %; ±29 %) and 48-h (32 %; ±29 %) relative to baseline, but decreased IL-6 at 24-h relative to post-exercise (-20 %; ±18 %).

CONCLUSIONS: Oral curcumin likely reduces pain associated with DOMS with some evidence for enhanced recovery of muscle performance. Further study is required on mechanisms and translational effects on sport or vocational performance.

original abstract†Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.

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