None
Conditions
Interventions
Experimental group:All participants received the three intervention conditions in a random order: placebo (PLA), 3 mg/kg caffeine (CAF3), and 6 mg/kg caffeine (CAF6), with a single dose for each condi
Sponsors
Beijing Sport University
Eligibility
Sex/Gender
Male
Age
18 Years to 25 Years
Inclusion criteria
Inclusion criteria: 1. Male, aged 18–25 years; 2. National Class II athlete standard for 100 m sprint; 3. At least 3 years of systematic sprint training experience; 4. Capable of completing maximal-effort 60 m sprint, vertical jump and cycle ergometer tests at present; 5. Voluntary participation and compliance with all laboratory visits and experimental control protocols.
Exclusion criteria
Exclusion criteria: 1. Known caffeine allergy, or previous adverse reactions such as obvious palpitations, chest pain, syncope, severe anxiety after caffeine ingestion; 2. Suffering from cardiovascular, nervous, metabolic diseases or other illnesses unsuitable for maximal-intensity exercise; 3. Lower extremity injuries interfering with all-out sprint within the past 3 months, or pain, fever, infection and other acute discomfort prior to trials; 4. Taking medications that may affect neuromuscular, cardiovascular function or caffeine metabolism; 5. Failure to comply with requirements for caffeine withdrawal, diet, training and sleep schedule control.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 60 m sprint;Vertical jump height;Wingate power; | — |
Countries
China
Contacts
Public ContactMei Tao
Beijing Sport University
Outcome results
None listed