Oral L-arginine before resistance exercise blunts growth hormone in strength trained males.

What Was Tested

Researchers studied Exogenous HGH, sermorelin & older GHRPs (why they're passed over) in this randomized controlled trial publication.

The purpose was to investigate the combined effects of resistance exercise and L-arginine supplementation on plasma L-arginine, GH, GH secretagogues, and IGF-1 in strength trained participants.

Why It Was Studied

Fourteen strength trained males (age: 25 ± 4 y; body mass: 81.4 ± 9.0 kg; height: 179.4 ± 6.9 cm; and training experience: 6.3 ± 3.4 y) participated in a randomized double-blind crossover design (separated by ~7 days).

Blood samples were collected at rest, before exercise, and at 0, 15, 30, and 60 min of rest-recovery.

Who Took Part

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

How the Study Was Run

In design terms this was a randomized, double-blind, placebo-controlled and crossover study.

Because people in this Exogenous HGH, sermorelin & older GHRPs (why they're passed over) 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 Exogenous HGH, sermorelin & older GHRPs (why they're passed over), so expectations could not easily colour the readings.

Some participants received a placebo instead of Exogenous HGH, sermorelin & older GHRPs (why they're passed over), giving a reference point.

Each person switched between Exogenous HGH, sermorelin & older GHRPs (why they're passed over) and the comparison at some point, usually with a gap in between.

What Was Measured

Topics PubMed links to this paper include Area Under Curve, Arginine, Human Growth Hormone, Insulin-Like Growth Factor I, Muscle Strength, Physical Fitness and Resistance Training.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Exogenous HGH, sermorelin & older GHRPs (why they're passed over).

The publication is from 2014 (International journal of sport nutrition and exercise metabolism), a journal based in United States.

More context: the Exogenous HGH, sermorelin & older GHRPs (why they're passed over) compound page, all human trials.