Morning-strength boost with caffeine or whole-body vibration

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Healthy adults aged 18–35 who train regularly are assigned to caffeine, whole-body vibration, placebo, or a control condition to see if morning strength and cognitive performance improve. Participants must follow a strict schedule, abstain from exercise 24 hours before testing, and limit caffeine intake before testing. The trial uses a four-arm design to compare the effects of caffeine, vibration, and inactive conditions. The study is led by Liverpool John Moores University at the Tom Reilly Building in Liverpool, UK. Results will help determine whether caffeine or vibration could be practical ways to enhance morning performance in young, active adults.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Age: 18-35years old
* Healthy (as determined by the pre-participation questionnaire)
* \>2 years strength trained individuals
* Consume \>150 mg/day of caffeine
* Be able to stick to the retiring and waking schedule of the study as well as no exercise 24 h before and no caffeine.

Exclusion Criteria:

* Age: \<18 or \>35 years old
* Consume \<150 mg/day of caffeine
* Deemed unhealthy/unable to perform exercise determined by PAR-Q
* Shift worker or having travelled out of the UK time zone within the last month of testing
* Muscle related injury or broken/fractured bone within the past 3 years Diagnosed sleep disorder

Where it's running

• Tom Reilly Building
  Liverpool, Merseyside, United Kingdom Recruiting

Study contacts

• Principal investigator: Joao PS Agulhari, BSc — Liverpool John Moores University
• Study coordinator: Joao Agulhari, BSc
• Email: jpagulhari@gmail.com
• Phone: 07379664724

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.