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Fish Oil, Isoflavones May Not Benefit Delayed Onset MuscleSoreness

Fish Oil, Isoflavones May Not Benefit Delayed Onset Muscle Soreness

LEXINGTON, Ky.--At the University of Kentucky, Lexington, researchers investigated whether fish oil or isoflavones--both considered inflammation modulators--could benefit delayed onset muscle soreness, which has been associated with inflammatory response. In a study with 22 subjects, researchers led by Jon Lenn administered 1.8 g/d of omega-3 fatty acids, 120 mg/d of soy isolate or a placebo 30 days prior to and during the week of exercise. Significant decreases in relaxed arm angle and strength were observed 48 hours after exercise, in addition to significant increases in pain and arm circumference. In the end, neither fish oil nor isoflavones were found to be effective for delayed onset muscle soreness, at least when using this protocol. The study appeared in the October edition of Medicine & Science in Sports & Exercise (34, 10:1605-13, 2002) (

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