Hutchinson 2016.

Methods	Randomised controlled trial (parallel design)
Participants	Setting: laboratory; USA n = 16 college students (24 were originally recruited) Mean age blackcurrant group (n = 9, 7 female) 19.5 (SEM 0.3) years Mean age placebo group (n = 8, 6 female) 20.9 (SEM 0.9) years Inclusion/exclusion criteria Inclusion criteria included being untrained, moderately active, between the ages of 18 and 40 years. Exclusion criteria included a recent history of ankle, knee, hip or back pain that precluded squatting exercises, and the use of anti‐inflammatory or analgesic drugs that would reduce pain.
Interventions	Intervention Commercially available blackcurrant nectar (CurrantC) was provided by CorpPharms (Staatsburg, NY). Each 16 oz bottle contained approximately 100 g of fruit, malvidin glucosides 193.25 mg, cyanidin glucosides 175.69 mg Placebo The placebo drink was produced by mixing black cherry Kool‐Aid powder (Kraft, Ryrerbrook, NY, USA) with water Duration 8 days
Outcomes	Primary Muscle soreness was assessed during a full range squat with no external weight using a 0 to 10 scale where 0 is "no soreness" and 10 is "extreme discomfort"
Exercise type	Eccentric squatting session consisted of 3 sets of 10 repetitions of eccentric contractions using a bar weighted with 115% of the respective 1 repetition maximum
Sources of funding	None
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Independent 3rd party completed randomisation using random number generation in Excel
Allocation concealment (selection bias)	Unclear risk	Not indicated in the manuscript Authors contacted on 3 February 2017 but no response was received
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Double‐blind; labels removed from bottles; neither personnel nor participants aware of contents
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Double‐blind
Incomplete outcome data (attrition bias) All outcomes	High risk	24 recruited, 16 completed the study (4 illness; 3 injury; 1 removed due to undertaking resistance training prior to study)
Selective reporting (reporting bias)	High risk	All outcomes reported at all time points Adverse effects of antioxidant supplementation were not reported
Other bias	Low risk	Diet not standardised during the trial however participants advised to maintain normal diet and avoid anti‐inflammatory foods and drugs