Effects of an amino acid/creatine energy supplement on the acute hormonal response to resistance exercise.

What Was Tested

The paper reports a study of Creatine and Amino Acids, published as a randomized controlled trial.

The authors aimed to examine the acute hormonal and performance responses to resistance exercise with and without prior consumption of an amino acid/creatine/energy supplement.

Why It Was Studied

Eight men performed a resistance-exercise protocol at baseline (BL), 20 min after consuming a supplement (S) consisting of essential amino acids, creatine, taurine, caffeine, and glucuronolactone or a maltodextrin placebo (P).

Venous blood samples were obtained before and immediately after (IP), 15 min (15P), and 30 min (30P) after each protocol.

Who Took Part

The age groups tagged for this paper are adults, men only.

How the Study Was Run

The researchers set it up as a randomized, double-blind, placebo-controlled and crossover study.

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

Neither the participants nor the staff measuring them knew who was on Creatine, so expectations could not easily colour the readings.

Some participants received a placebo instead of Creatine, giving a reference point.

Each person switched between Creatine and the comparison at some point, usually with a gap in between.

What Was Measured

PubMed files the paper under topics including Amino Acids, Area Under Curve, Creatine, Dietary Supplements, Energy Intake, Human Growth Hormone and Testosterone.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Creatine and Amino Acids.

The publication is from 2007 (International journal of sport nutrition and exercise metabolism), a journal based in United States.

More context: all human trials.