Week 7 Key Reading - McCartney et al., (2017) Flashcards
What did this study find about performance enhancement with addition of protein to a carbohydrate beverage ?
No further performance enhancement was observed with the addition of protein to a carbohydrate containing beverage.
The performance-enhancing effect of protein demonstrated in some studies appears to be a consequence of the additional energy delivered in the nutrient, rather than an effect of protein ingestion itself.
What did this study find about the effect of carbohydrate injection with water ?
Carbohydrate co-ingested with water during and/or following an initial bout of activity improves subsequent endurance exercise performance (+ 4.0%Δ mean power output) compared with water alone.
What were the concluding remarks from this study about carb and protein ingestion when limited time was available and if it had an effect on performance ?
Results of the present review suggest that individuals who have limited opportunity for nutritional recovery between exercise bouts (e.g. ≤ 4 h) should prioritise CHO ingestion (with fluid) during and/or following the initial exercise session to enhance performance on subsequent tasks involving endurance and/or anaerobic activity. Protein ingestion is unlikely to benefit or harm subsequent endurance exercise performance and should be consumed as recommended to facilitate muscle protein synthesis.
What did this study find about the performance effect of being fed vs fasted during training sessions.
Whilst the magnitude of carbohydrate-mediated performance-enhancement was significantly diminished when participants were ‘Fed’ as opposed to ‘Fasted’, a positive effect of carbohydrate was still detectable under the ‘Fed’ condition.
