Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
 
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Journal of Sports Science and Medicine
ISSN: 1303 - 2968
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©Journal of Sports Science and Medicine (2017) 16, 69 - 76
Research article
High-Intensity Exercise and Carbohydrate Supplementation do not Alter Plasma Visfatin
Paul F. Mellick1,, Bryan J. Feger2, Douglas J. Oberlin3, Paul G. Davis3, Laurie Wideman3

1 Department of Health and Human Performance, The University of St. Thomas, St. Paul, MN, USA
2 Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA
3 Department of Kinesiology, The University of North Carolina at Greensboro, Greensboro, NC, USA

Paul F. Mellick
✉ Health and Human Performance, Mail #4004, 2115 Summit Ave St. Paul, MN, USA
Email: mell0159@stthomas.edu

Received:
14-11-2016 -- Accepted: 23-12-2016 --
Published (online): 01-03-2017

ABSTRACT

The purpose of the study was to examine the effect of high-intensity exercise and carbohydrate supplementation (CHO) on plasma visfatin. On 2 separate days, 10 sprint-trained males (age = 26.4 ± 5.3 yr; Ht = 1.77 ± 0.03 m; Wt = 78.78 ± 9.10 kg; BF% = 13.96 ± 7.28%) completed 4, 3-min bouts of cycling at 50% mean anaerobic power, with 6 min of rest between bouts. On CHO day, subjects ingested 50g of CHO 30 min before exercise. On control day, subjects ingested a sugar-free drink (CON) 30 min before exercise. Blood was drawn before supplementation, 15 min before exercise, before and after each exercise bout, and 15 and 30 min post exercise. Visfatin, glucose, and insulin were determined. Truncal fat was assessed by dual energy x-ray. Visfatin was not significantly different between treatments (CHO vs CON) at any time point (p = 0.163), and was not significantly altered by exercise (p = 0.692). Insulin [25.65 vs 8.35 mU/l, CHO vs CON, respectively] and glucose [138.57 vs 98.10 mg/dl, CHO vs CON, respectively] were significantly elevated after CHO ingestion and remained elevated throughout the first half of exercise. Baseline visfatin was significantly correlated with truncal fat (r2 = 0.7782, p < 0.05). Visfatin was correlated to truncal fat in sprint-trained males, but was not altered by exercise or CHO supplementation.

Key words: Visfatin, glucose, exercise, carbohydrate supplementation, insulin
Key Points
Plasma visfatin was not affected by exercise or carbohydrate supplementation.
Plasma visfatin was significantly correlated to abdominal fat.
Plasma visfatin did not follow a similar pattern to blood glucose or plasma insulin as has been shown in previous studies.

 


  

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