Recovery from run training: efficacy of a carbohydrate-protein beverage?
Post-exercise nutrition is critical to facilitate recovery from training. To determine if added protein (P) or increased carbohydrate (CHO) differentially improves recovery, eight runners ingested: 6% CHO (CHO6), 8% CHO + 2% protein (CHO-P), and isocaloric 10% CHO (CHO10) following a 21-km run plus treadmill run to fatigue (RTF) at 90% VO2max. RTF was repeated after 2 h recovery. After 24 h, a 5 km time trial was performed. Insulin and blood glucose were higher (P < 0.05) following CHO10 compared to CHO-P and CHO6, but did not affect improvement from the first to second RTF (29.6% +/- 6, 40.5% +/- 8.8, 40.5% +/- 14.5) or 5 km time (1100 +/- 36.3, 1110 +/- 37.3, 1118 +/- 36.5 s). CK was not different, but perceived soreness with CHO-P (2.1 +/- 0.5) was lower than CHO10 (5.2 +/- 0.7). Additional calories from CHO or P above that provided in sports drinks does not improve subsequent performance after recovery; but less soreness suggests benefits with CHO-P.
Millard-Stafford
Mindy
M
Exercise Physiology Laboratory, School of Applied Physiology, Georgia Institute of Technology, Atlanta 30332-0356, USA.
Warren
Gordon L
GL
Thomas
Leah Moore
LM
Doyle
J Andrew
JA
Snow
Teresa
T
Hitchcock
Kristen
K
D000328:Adult; D019540:Area Under Curve; D001628:Beverages; D001786:Blood Glucose / Q000032:analysis / Q000378:metabolism; D018592:Cross-Over Studies; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D004044:Dietary Proteins / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D019344:Lactic Acid / Q000032:analysis / Q000378:metabolism; D008297:Male; D018482:Muscle, Skeletal / Q000293:injuries / Q000378:metabolism*; D010101:Oxygen Consumption; D010807:Physical Endurance; D012420:Running / Q000502:physiology*; D013997:Time Factors; D016896:Treatment Outcome
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D004044:Dietary Proteins; D019344:Lactic Acid