The Influence of Branched-Chain Amino Acid Supplementation on Fatigue and Tryptophan Metabolism After Acute and Chronic Exercise in Older Adults: Protocol for a Pilot Randomized Controlled Trial

Ronna N Robbins   ^{1, 2} , PhD ;   Tiffany Cortes   ^{2, 3} , MD ;   Jason C O'Connor   ^{4, 5} , PhD ;   Rozmin Jiwani   ^{2, 6} , PhD ;   Monica C Serra   ^{2, 3} , PhD

¹ Department of Nutrition and Food Science, Texas Woman's University, Denton, TX, United States

² South Texas Veterans Health Care System, Geriatric Research Education and Clinical Center, San Antonio, TX, United States

³ Sam & Ann Barshop Institute for Longevity & Aging Studies, Department of Medicine, University of Texas Health Health Science Center San Antonio, San Antonio, TX, United States

⁴ South Texas Veterans Health Care System, San Antonio, TX, United States

⁵ Department of Pharmacology, University of Texas Health Science Center San Antonio, San Antonio, TX, United States

⁶ School of Nursing, University of Texas Health Science Center San Antonio, San Antonio, TX, United States