| Summary: | <p>Abstract</p> <p>Background</p> <p>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).</p> <p>Methods</p> <p>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<sub>ex</sub>) using a Computrainer indoor trainer. Following AM<sub>ex</sub>, 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<sub>ex </sub>subjects repeated the time trial (PM<sub>ex</sub>).</p> <p>Results</p> <p>There was a significant reduction in performance for both groups in PM<sub>ex </sub>versus AM<sub>ex</sub>. However, performance and power decreases between PM<sub>ex </sub>and AM<sub>ex </sub>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<sub>ex</sub>, despite a higher average workload in the C+P group.</p> <p>Conclusion</p> <p>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.</p>
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