Effects of Short-term Acute Creatine Supplementation on Power, Speed and Muscular Strengths in Young Football Players

NCT07475676 | Not Yet Recruiting

• 1 other identifier: SMU_ETHICS_2025-26_229
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

Creatine has been widely studies within the strength and conditioning background and has been seen to show positive effects on performance assess the effects of creatine on sports requiring a range of different fitness components to be successful such as football. Previous research has suggested benefits of creatine supplementation such as increasing PCr (phosphocreatine) stores to aid ATP (adenosine triphosphate) production, increasing muscle water retention resulting in enhanced protein synthesis, reduced muscle damage and anti-inflammation. Identifying supplements that are scientifically proved to aid performance can help optimise training and develop physical ability of athletes to enhance performance.

Conditions

Performance Enhancement

Outcome Measures

Primary Outcomes (3)

• The effects of acute creatine supplementation on semi-pro football player speed test results following a seven-day supplementation period.

  Participants will supplement creatine for a seven day period. Baseline testing will take place before supplementation using a 30m sprint test, it will be measured by the time it took to sprint the 30m (seconds). Participants will undergo the same test after following 7 days. The effects of creatine supplementation will be noted by the difference between sprint test scores (seconds).

  7 days

• The effects of acute creatine supplementation on semi-pro football player countermovement jump (power) results following a seven-day supplementation period.

  Participants will supplement creatine for a seven-day period. Baseline testing for power will take place before supplementation using a countermovement jump. Participants will undergo the same test after following 7 days. The effects of creatine supplementation will be noted by the difference between countermovement jump scores (power).

  7 days

• The effects of acute creatine supplementation on semi-pro football player lower limb strength test results completed through a 5-RM leg press test following a seven-day supplementation period.

  Participants will supplement creatine for a seven-day period. Baseline testing will take place before supplementation using a 5-RM leg press, it will be measured by the maximal amount of weight used to complete five reps on the leg press (kg). Participants will undergo the same test after following 7 days. The effects of creatine supplementation will be noted by the difference between the maximal amount of weight used to complete five reps on the leg press (kg)t test scores (seconds).

  7 days

Study Arms (2)

Placebo

PLACEBO COMPARATOR

Dietary Supplement: Placebo

Creatine Supplementation

ACTIVE COMPARATOR

Dietary Supplement: Creatine Monohydrate

Interventions

Placebo DIETARY_SUPPLEMENT

Placebo

Placebo

Creatine Monohydrate DIETARY_SUPPLEMENT

Creatine Monohydrate

Creatine Supplementation

Eligibility Criteria

• Age: 18 Years - 45 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Male or female between the age of 18-45
• Trained individuals currently playing at a semi-professional (regional) level currently training and competing no more than three times a week
• Free of long-term injuries for the last six months
• Not supplementing creatine within the last 3 months.
• Able to swallow pills
• No medical conditions

You may not qualify if:

• Individuals will be excluded from participation if they are under the age of 18 or over the age of 45
• Not currently playing football at a semi-professional (regional) level.
• Train and/or compete more than three times per week
• Have any current injury or have experienced a long-term injury within the previous six months that may affect performance or increase the risk of injury during testing.
• Individuals who have supplemented with creatine within the last three months, - Any medical condition will not be eligible to take part in the study.

Sponsors & Collaborators

• St. Mary's University, Twickenham: lead

Study Sites (1)

St Mary's University Twickenham London

London, TW1 4SX, United Kingdom

Location

MeSH Terms

Interventions

Creatine

Intervention Hierarchy (Ancestors)

Guanidines; Amidines; Organic Chemicals; Amino Acids; Amino Acids, Peptides, and Proteins

Central Study Contacts

Wiktor Dabrowski, Bsc

CONTACT

+447526985253; wiktord839@gmail.com

Alex Woodhead

CONTACT

020-8240-4000; alex.woodhead@stmarys.ac.uk

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 27, 2026
• First Posted: March 16, 2026
• Study Start: March 1, 2026
• Primary Completion: March 30, 2026
• Study Completion: April 13, 2026
• Last Updated: March 16, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

GB (1)