NCT04539054

Pre-workout Supplement Versus Caffeine on Energy Expenditure.

Effects of a Multi-ingredient Pre-workout Supplement Versus Caffeine on Energy Expenditure and Feelings of Fatigue During Low-intensity Treadmill Exercise in College-aged Males.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: Northern Illinois University · Academic / Other
• Sex: Male
• Age: 19 Years – 29 Years
• Healthy volunteers: Accepted

Summary

The primary purpose of this study was to examine the acute effects of a multi-ingredient pre-workout supplement versus an ergogenic dose of caffeine (6 mg/kg) on energy expenditure during low-intensity exercise. The effects of these substances on substrate utilization, gas exchange, and psychological factors were also investigated. Twelve males (mean ± SD: age = 22.8 ± 2.4 years) completed three bouts of 60-min of treadmill exercise at 4.8-6.4 km/hr on separate days after consuming a pre-workout supplement, 6 mg/kg of caffeine, or placebo in a randomized fashion. The pre-workout and caffeine supplements resulted in significantly greater energy expenditure (p \< 0.001, p = 0.006, respectively), VO2 (p \< 0.001, p = 0.007, respectively), VCO2 (p = 0.006, p = 0.049, respectively), and VE (p \< 0.001, p = 0.007, respectively), but not rates of fat or carbohydrate oxidation or respiratory exchange ratio compared to placebo (collapsed across condition). In addition, the pre-workout supplement increased feelings of alertness (p = 0.015) and focus (p = 0.005) 30-minutes post-ingestion and decreased feelings of fatigue (p = 0.014) during exercise compared to placebo (collapsed across condition). Thus, the pre-workout supplement increased energy expenditure and measures of gas exchange to the same extent as 6 mg/kg of caffeine with concomitant increased feelings of alertness and focus and decreased feelings of fatigue.

Conditions

• Healthy

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	ENGN Shred	ENGN Shred is a multi-ingredient pre-workout supplement.
DIETARY_SUPPLEMENT	Nutricost caffeine powder	Caffeine powder.
DIETARY_SUPPLEMENT	Crystal Light	Non-caloric Crystal Light matched for the pre-workout in terms of flavor and consistency.

Timeline

• Start date: 2019-09-01
• Primary completion: 2019-12-31
• Completion: 2019-12-31
• First posted: 2020-09-04
• Last updated: 2020-09-04

Locations

1 site across 1 country: United States