1. Similar performance after intake of carbohydrate plus whey protein and carbohydrate only in the early phase after non‐exhaustive cycling.
- Author
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Sollie, Ove, Clauss, Matthieu, Jeppesen, Per B., Tangen, Daniel S., Johansen, Egil I., Skålhegg, Bjørn S., Ivy, John L., and Jensen, Jørgen
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BLOOD sugar analysis , *STATISTICS , *ERGOGENIC aids , *ENDURANCE sports training , *ANALYSIS of variance , *OXYGEN consumption , *ONE-way analysis of variance , *PHYSICAL training & conditioning , *CYCLING , *DIETARY supplements , *COOLDOWN , *RANDOMIZED controlled trials , *NITROGEN , *INSULIN , *BLIND experiment , *LACTATES , *ENZYME-linked immunosorbent assay , *REPEATED measures design , *DESCRIPTIVE statistics , *RESEARCH funding , *ATHLETIC ability , *DIETARY carbohydrates , *WHEY proteins , *STATISTICAL sampling , *CROSSOVER trials , *DATA analysis software , *DATA analysis , *VENOUS puncture ,URINE collection & preservation - Abstract
Aim: The aim of the present study was to compare performance 5 h after a 90‐min endurance training session when either carbohydrate only or carbohydrate with added whey hydrolysate or whey isolate was ingested during the first 2 h of the recovery period. Methods: Thirteen highly trained competitive male cyclists completed three exercise and diet interventions (double‐blinded, randomized, crossover design) separated by 1 week. The 90‐min morning session (EX1) included a 60 min time‐trial (TT60). Immediately and 1 h after exercise, participants ingested either (1) 1.2 g carbohydrate∙kg−1∙h−1 (CHO), (2) 0.8 g carbohydrate∙kg−1∙h−1 + 0.4 g isolate whey protein∙kg−1∙h−1 (ISO) or (3) 0.8 g carbohydrate∙kg−1∙h−1 + 0.4 g hydrolysate whey protein∙kg−1∙h−1 (HYD). Additional intakes were identical between interventions. After 5 h of recovery, participants completed a time‐trial performance (TTP) during which a specific amount of work was performed. Blood and urine were collected throughout the day. Results: TTP did not differ significantly between dietary interventions (CHO: 43:54 ± 1:36, ISO: 46:55 ± 2:32, HYD: 44:31 ± 2:01 min). Nitrogen balance during CHO was lower than ISO (p < 0.0001) and HYD (p < 0.0001), with no difference between ISO and HYD (p = 0.317). In recovery, the area under the curve for blood glucose was higher in CHO compared to ISO and HYD. HR, VO2, RER, glucose, and lactate during EX2 were similar between interventions. Conclusion: Performance did not differ after 5 h of recovery whether carbohydrate only or isocaloric carbohydrate plus protein was ingested during the first 2 h. Correspondingly, participants were not in negative nitrogen balance in any dietary intervention. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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