Charles Riggs
University of Arkansas
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Charles Riggs.
Journal of Sports Sciences | 1991
Larry W. Titlow; Jimmy H. Ishee; Charles Riggs
Caffeine consumption prior to athletic performance has become commonplace. The usual dosage is approximately 200 mg, a level of caffeine ingestion equivalent to two cups of brewed coffee. This study was designed to examine the effects of a common level of caffeine ingestion, specifically 200 mg, on metabolism during submaximal exercise performance in five males. The subjects performed two 60-min monitored treadmill workouts at 60% maximal heart rate during a 2-week period. The subjects were randomly assigned, double-blind to receive a caffeine or placebo capsule 60 min prior to exercise. Testing was performed in the afternoon following a midnight fast. Venous blood was withdrawn pre-exercise, every 15 min during the workout, and 10 min after recovery. Blood was analysed for free fatty acid, triglycerides, glucose, lactic acid, haemoglobin and haematocrit. The respiratory exchange ratio (R), perceived exertion (RPE) and oxygen uptake were measured every 4 min during exercise. An examination of the data with repeated-measures ANOVA revealed no significant differences between the two groups. Within the limitations of the study, it was concluded that 200 mg caffeine failed to affect metabolism during 60 min submaximal exercise.
Biochemistry | 2002
Tien V. Nguyen; Charles Riggs; Dusica Babovic-Vuksanovic; Yong Sung Kim; John F. Carpenter; Thomas P. Burghardt; Niels Gregersen; Jerry Vockley
European Journal of Applied Physiology | 2010
Charles Riggs; Marcos A. Michaelides; Koulla M. Parpa; Nancy J. Smith-Blair
Medicine and Science in Sports and Exercise | 2009
Libby E. McCurley; Molly Muck; Gun Soo Han; Tiffany L. Akins; Charles Riggs
Medicine and Science in Sports and Exercise | 2008
Tiffany L. Akins; Charles Riggs; Nan Smith-Blair; Libby E. McCurley
Medicine and Science in Sports and Exercise | 2007
Libby E. McCurley; Heather M. Claney; Marcos A. Michaelides; Nancy J. Smith-Blair; Charles Riggs
Medicine and Science in Sports and Exercise | 2007
Melissa Powers; Inza L. Fort; Ro Di Brezzo; Barbara B. Shadden; Ronna Turner; Paul Calleja; Charles Riggs
Medicine and Science in Sports and Exercise | 2006
Marcos A. Michaelides; David E. Martin; Charles Riggs
Medicine and Science in Sports and Exercise | 2006
David E. Martin; Marcos A. Michaelides; Charles Riggs
Medicine and Science in Sports and Exercise | 2005
David E. Martin; Marcos A. Michaelides; Charles Riggs