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Published on: June 8, 2017
Recovery from a cycling time trial is enhanced with carbohydrate-protein supplementation vs. isoenergetic
John M Berardi1, Eric E Noreen, Peter Wr Lemon
1Precision Nutrition, Inc, Toronto, Ontario, Canada. jb@johnberardi.com.
Background:
In this study we assessed whether a liquid carbohydrate-protein (C+P) supplement (0.8 g/kg C; 0.4 g/kg P) ingested early during recovery from a cycling time trial could enhance a subsequent 60 min effort on the same day vs. an isoenergetic liquid carbohydrate (CHO) supplement (1.2 g/kg).
Methods:
Two hours after a standardized breakfast, 15 trained male cyclists completed a time trial in which they cycled as far as they could in 60 min (AM(ex)) using a Computrainer indoor trainer. Following AM(ex), subjects ingested either C+P, or CHO at 10, 60 and 120 min, followed by a standardized meal at 4 h post exercise. At 6 h post AM(ex) subjects repeated the time trial (PM(ex)).
Results:
There was a significant reduction in performance for both groups in PM(ex) versus AM(ex). However, performance and power decreases between PM(ex) and AM(ex) were significantly greater (p = 0.05) with CHO (-1.05 +/- 0.44 km and -16.50 +/- 6.74 W) vs C+P (-0.30 +/- 0.50 km and -3.86 +/- 6.47 W). Fat oxidation estimated from RER values was significantly greater (p = 0.05) in the C+P vs CHO during the PM(ex), despite a higher average workload in the C+P group.
Conclusion:
Under these experimental conditions, liquid C+P ingestion immediately after exercise increases fat oxidation, increases recovery, and improves subsequent same day, 60 min efforts relative to isoenergetic CHO ingestion.
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