Tier 1's (by Citadel Nutrition) ability to improve sprint performance is rated as 2 out of 3. This rating means the evidence is mixed on the product's ability to deliver on this claim. While some of the evidence supports its use, other evidence does not. Using Tier 1 to improve sprint performance may lead to positive results. This rating is different from the product's overall rating and is based on what peer reviewed journal articles conclude on its ability to perform this one claim. This page contains an indepth analysis on how this claim-rating was calculated.

Note: The ratings on this page only deal with Tier 1's ability to improve sprint performance. To view the product's overall rating, visit the product's main page: Tier 1.

Table of Contents

  1. Simple Report
  2. Detailed Report
  3. References

Simple Report

Detailed Report

The detailed report is an in-depth analysis on how Tier 1's rating for this particular claim was calculated.

Claim Effectiveness Ratings

Each supplement product is a blend of ingredients. The database uses peer reviewed journal articles to rate the ingredients. These ratings are also used to rate how well products perform overall as well as on individual claims.

The supplement ingredients listed in table below are identified as affecting Tier 1's ability to improve sprint performance. The rating next to the ingredient describes the ingredient's ability to improve sprint performance. These ratings are averaged together and provide the product's overall ability to deliver on the same claim.

Ingredients Improve Sprint Performance Rating
Creatine Monohydrate 2.1 out of 3
Beta Alanine 1.9 out of 3
Caffeine 2 out of 3
Product's Claim Effectiveness Rating 2 out of 3

Claim Research Ratings

The research rating describes how well an ingredient's ability to perform a certain claim (such as improve sprint performance) has been researched. This rating is based on the amount of studies contained in the database on a particular ingredient and claim. Ingredient research ratings are averaged together to from the product's research rating for this specific cliam.

This rating is important because we need to know if there is enough research to make a valid conclusion on a product's worthiness. Ratings above 80 are ideal. Anything below 60 means there is not enoguh research to make a valid conclusion one way or another on a product's ability to deliver on this particular claim.

Ingredients Improve Sprint Performance Research Rating
Creatine Monohydrate
Beta Alanine
Product's Claim Research Rating


Effects of creatine supplementation on muscle power, endurance, and sprint performance
Effect of caffeine ingestion after creatine supplementation on intermittent high-intensity sprint performance
Effect of creatine supplementation on sprint exercise performance and muscle metabolism
Creatine supplementation does not improve physical performance in a 150 m race
Effects of plyometric training and creatine supplementation on maximal-intensity exercise and endurance in female soccer players
Creatine supplementation in young soccer players
Acute creatine supplementation and performance during a field test simulating match play in elite female soccer players
β-Alanine supplementation augments muscle carnosine content and attenuates fatigue during repeated isokinetic contraction bouts in trained sprinters
Effect of Beta Alanine and Sodium Bicarbonate Supplementation on Repeated-Sprint Performance
β-Alanine ingestion increases muscle carnosine content and combat specific performance in soldiers
Effects of Plyometric Training and Beta-Alanine Supplementation on Maximal-Intensity Exercise and Endurance in Female Soccer Players
Effect of beta-alanine supplementation on 800-m running performance
Effects of beta-alanine supplementation on sprint endurance
The effect of beta-alanine supplementation on power performance during repeated sprint activity
Effects of sodium phosphate and caffeine loading on repeated-sprint ability
Effect of caffeine ingestion after creatine supplementation on intermittent high-intensity sprint performance
Improvement of Sprint Performance in Wheelchair Sportsmen With Caffeine Supplementation
Caffeine and Sprint Cycling Performance: Effects of Torque Factor and Sprint Duration
Caffeine supplementation and multiple sprint running performance
Little effect of caffeine ingestion on repeated sprints in team-sport athletes
Effects of acute sleep deprivation and caffeine supplementation on anaerobic performance
Multiple effects of caffeine on simulated high-intensity team-sport performance
Acute Specific Effects of Caffeine-containing Energy Drink on Different Physical Performances in Resistance-trained Men
Effects of Coffee and Caffeine Anhydrous Intake During Creatine Loading