NCT07458594

Combined Caffeine and Rhodiola Rosea on Aerial Duel Performance in Soccer

Effects of Combined Caffeine and Rhodiola Rosea Supplementation on Aerial Duel Performance Under Fatigue in Soccer Players

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 96 (actual)
• Sponsor: Beijing Sport University · Academic / Other
• Sex: Male
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

Summary

This study will examine whether caffeine (CAF) and Rhodiola rosea (RHO) supplementation, taken alone or in combination, can improve explosive performance and soccer-specific aerial duel performance in trained male soccer players. In a randomized, double-blind, placebo-controlled, parallel design, participants will be assigned to placebo, RHO, CAF, or RHO+CAF for 4 weeks. Performance outcomes will be assessed before and after the intervention using countermovement jump measures (including early take-off impulse) and standardized heading tests (heading reach height, ball exit velocity, and heading duel success rate), with additional measures of neck isometric strength and perceived exertion.

Conditions

• Aerial Duel Performance in Soccer Players

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Caffeine	Anhydrous caffeine capsules administered at a dose of 3 mg/kg body weight. Taken as a single dose 30 minutes prior to the physical performance tests.
DIETARY_SUPPLEMENT	Rhodiola rosea extract	Standardized Rhodiola rosea extract capsules. Daily total dosage of 2.4 g (containing approx. 12 mg salidroside), taken twice daily (before breakfast and lunch) for 30 days.
DIETARY_SUPPLEMENT	Placebo	Appearance-matched capsules containing inert ingredients (starch or rice flour).

Timeline

• Start date: 2025-10-30
• Primary completion: 2025-12-27
• Completion: 2026-01-03
• First posted: 2026-03-09
• Last updated: 2026-03-09

Locations

2 sites across 1 country: China