The Effects of L-arginine Supplementation on Anaerobic Exercise Performance

The purpose of this study is to evaluate if acute ingestion of L-arginine will enhance anaerobic exercise performance in young, healthy, and recreationally active adults.

After being enrolled in the study you will be measured on a number of parameters including: body circumferences, body composition via bioelectrical impedance analysis (BIA), height, weight, resting blood pressure, and resting heart rate. All participants will be asked to complete the same protocol for this study. The study design is a randomized, double-blind, placebo controlled, cross-over type of study. What this means is that each participant in the study will complete two exercise sessions after ingesting either a placebo (dextrose - a sugar molecule) or the active ingredient \[insert supplement\] plus dextrose. Neither you nor the research assistant testing you on the exercise sessions will know which ingredient you are ingesting before each exercise trial (i.e., the double-blind portion of the study). We will also randomize the order of which supplement plus placebo or placebo alone you will ingest so neither you nor the research assistant testing will know this either. The cross-over part of the study is that you will complete 2 testing sessions to assess some physical performance variables (grip strength, jump height and power, and anaerobic energy system power output) with one-week of a wash-out period between them. This will allow us to compare the placebo session to the active nutritional supplement plus placebo condition to evaluate if the supplements improve exercise performance acutely. You will also be asked to fill in a 24-hour food and fluid log for the period before your initial exercise test. Then you will be asked to repeat this food and fluid intake when completing the second session. No caffeine, alcohol, or vigorous exercise will be allowed for the 24-hours prior to each trial.