Effect of a carbohydrate-protein multi-ingredient supplement on intermittent sprint performance and muscle damage in recreational athletes.

What Was Tested

This randomized controlled trial looks at Dietary Carbohydrates.

This study compares the effects of a commercially available carbohydrate-protein supplement enriched with l-glutamine and l-carnitine-l-tartrate to carbohydrate alone or placebo on sprint performance, muscle damage markers, and recovery from intermittent exercise.

On 3 occasions, 10 recreationally trained males ingested a multi-ingredient, a carbohydrate supplement, or a placebo before, during, and immediately after a 90-min intermittent repeated sprint test.

Who Took Part

PubMed indexes the participants as adults, men only.

How the Study Was Run

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

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

As a double-blind Dietary Carbohydrates study, the assignments were hidden from both participants and investigators until the end.

The comparison arm used a placebo, so changes seen with Dietary Carbohydrates could be set against what happens without it.

Fifteen-metre sprint times, creatine kinase, myoglobin, and interleukin-6 were assessed before (pre), immediately after (post), 1 h after (1h), and 24 h after (24h) exercise.

What Was Measured

On 3 occasions, 10 recreationally trained males ingested a multi-ingredient, a carbohydrate supplement, or a placebo before, during, and immediately after a 90-min intermittent repeated sprint test.

Total sprint time measured during the intermittent protocol was not different between conditions.

PubMed files the paper under topics including Athletic Performance, Dietary Carbohydrates, Dietary Proteins, Dietary Supplements, Muscle Fatigue and Muscular Diseases.

The authors tagged it with the keywords creatine kinase, créatine kinase, fatigue musculaire, interleukin-6, interleukine-6 and myoglobin.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Dietary Carbohydrates.

The publication is from 2014 (Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme), a journal based in Canada.

More context: all human trials.