Effects of Caffeine in Hydration and Energy Metabolism

Summary

The main purposes of this randomized cross-over trial are to characterize and compare the effects of a moderate dose of caffeine intake in healthy physically active males on hydration and energy metabolism specifically: 1. Total body water and its compartments (intracellular and extracellular) assessed by by dilution techniques, and hydration state by urine specific gravity; 2. Total energy expenditure by double labeled water, resting energy expenditure by indirect calorimetry, and physical activity energy expenditure; 3. Energy expenditure in physical activity of daily living, in particular duration and intensity of activity. 4. If the changes occurred between placebo and caffeine ingestion on the main outcomes were dependent on specific covariates, namely body composition and dietary intake.

Timeline

Start

2010-01

Primary completion

2010-03

Completion

2010-03

Publications

• Results Silva AM, Armada-da-Silva P, Sardinha LB, Júdice PB, Magalhães JP, Matias CN & Santos DA. Efeitos da ingestão de cafeína na água corporal total, distribuição de fluidos intra e extracelulares e no dispêndio energético. A Report for the Institution of Hydration and Health, In press.
• Results Júdice PB (2011). Determinant Factors on hydration status assessed by Urine Specific Gravity: accuracy of technical procedures and effect of caffeine ingestion. Master's Degree Thesis. Faculty of Human Kinetics-Technical University of Lisbon, Cruz-Quebrada.
• Results Magalhães JP, Santos DA, Silva AM, Matias CN, Júdice PB, Quintas IC, Sardinha LB (2011). Total energy expenditure: combined heart rate and motion sensor vs uni-axial accelerometry models Book of abstracts of the International conference on Recent Advances and Controversies in Measuring Energy Metabolism, pp 106.
• Results Quintas IC, Santos DA, Matias CN, Silva AM, Gobbo, LA, Gonçalves EM, Magalhães JP, Júdice PB, Sardinha LB (2011). Does caffeine intake affect resting energy expenditure? Book of abstracts of the International conference on Recent Advances and Controversies in Measuring Energy Metabolism, pp 104.
• Results Júdice PB, Silva AM, Magalhães JP, Matias CN, Santos DA, Armada-da-Silva P, & Sardinha LB. Does caffeine intake increases energy expenditure and habitual physical activity? A double-blind randomized crossover trial. Medicine and Science in Sports and Exercise. In Review.
• Francisco R, Rosa GB, Judice PB, Magalhaes JP, Cruz AD, Sardinha LB, Lukaski HC, Silva AM. Four days of a moderate dose of caffeine does not alter raw bioelectrical impedance analysis parameters in healthy males. Clin Nutr ESPEN. 2025 Oct;69:599-607. doi: 10.1016/j.clnesp.2025.08.005. Epub 2025 Aug 6.
• Silva AM, Santos DA, Matias CN, Judice PB, Magalhaes JP, Ekelund U, Sardinha LB. Accuracy of a combined heart rate and motion sensor for assessing energy expenditure in free-living adults during a double-blind crossover caffeine trial using doubly labeled water as the reference method. Eur J Clin Nutr. 2015 Jan;69(1):20-7. doi: 10.1038/ejcn.2014.51. Epub 2014 Apr 2.
• Judice PB, Matias CN, Santos DA, Magalhaes JP, Hamilton MT, Sardinha LB, Silva AM. Caffeine intake, short bouts of physical activity, and energy expenditure: a double-blind randomized crossover trial. PLoS One. 2013 Jul 15;8(7):e68936. doi: 10.1371/journal.pone.0068936. Print 2013.
• Silva AM, Judice PB, Matias CN, Santos DA, Magalhaes JP, St-Onge MP, Goncalves EM, Armada-da-Silva P, Sardinha LB. Total body water and its compartments are not affected by ingesting a moderate dose of caffeine in healthy young adult males. Appl Physiol Nutr Metab. 2013 Jun;38(6):626-32. doi: 10.1139/apnm-2012-0253. Epub 2013 Jan 15.
• Judice PB, Magalhaes JP, Santos DA, Matias CN, Carita AI, Armada-Da-Silva PA, Sardinha LB, Silva AM. A moderate dose of caffeine ingestion does not change energy expenditure but decreases sleep time in physically active males: a double-blind randomized controlled trial. Appl Physiol Nutr Metab. 2013 Jan;38(1):49-56. doi: 10.1139/apnm-2012-0145. Epub 2013 Jan 18.

Drugs

Indications

No indication recorded.