Higher doses of a green tea-based supplement increase post-exercise blood flow following an acute resistance exercise bout in recreationally resistance-trained college-aged men.

What Was Tested

Researchers studied Copper (Supplement) in this randomized controlled trial publication.

However, human data are lacking.

Who Took Part

PubMed indexes the participants as young adults and adults, men only.

During testing sessions, participants reported to the laboratory following an overnight fast and rested in a supine position for 15 min.

Thereafter, baseline measurements for resting heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), brachial artery diameter (BAD) and blood flow (BBF) were obtained (PRE).

How the Study Was Run

The design is described as randomized, double-blind and placebo-controlled.

Because people in this Copper (Supplement) study were split into groups at random, differences between the groups are less likely to reflect who happened to join each one.

Blinding on both sides kept the participants and researchers unaware of who received Copper (Supplement).

A placebo (an inactive look-alike) gave the Copper (Supplement) group a baseline to be compared against.

HR, SBP, DBP, BAD and BBF were measured 45 min after placebo or GBS ingestion (PRE2).

Participants were then placed in a recumbent position and performed 4 sets of 10 arm curl repetitions using an 11 kg dumbbell.

Participants returned to a supine position and HR, SBP, DBP, BAD and BBF were obtained within the first 3 min following exercise (POST), 15 min after exercise (15POST), and 45 min after exercise (45POST).

Participants returned to the laboratory 24-48 h later to repeat the same protocol with either GBS or the placebo depending on randomization.

No statistical comparisons were made between studies.

What Was Measured

The subject headings attached to it are Dietary Supplements, Hemodynamics, Resistance Training, Sports Nutritional Physiological Phenomena and Tea.

Author keywords: Blood flow, Green tea and Resistance exercise.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Copper (Supplement).

Its findings take up roughly 5 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2020 (Journal of the International Society of Sports Nutrition), a journal based in United States.

More context: the Copper (Supplement) compound page, all human trials.