Year-end Sale % OFF 
Abstract
BackgroundPerforming regular exercise is known to manifest a number of health benefits that mainly relate to cardiovascular and muscular adaptations to allow for greater oxygen extraction and utilization. There is increasing evidence that nutrient intake can affect the adaptive response to a single exercise bout, and that protein feeding is important to facilitate this process. Thus, the exercise-nutrient interaction may potentially lead to a greater response to training. The role of post-exercise protein ingestion in enhancing the effects of running-based endurance exercise training relative to energy-matched carbohydrate intervention remains to be established. Additionally, the influence of immediate versus overnight protein ingestion in mediating these training effects is currently unknown. The current protocol aims to establish whether post-exercise nutrient intake and timing would influence the magnitude of improvements during a prescribed endurance training program.Methods/DesignThe project involves two phases with each involving two treatment arms applied in a randomized investigator-participant double-blind parallel group design. For each treatment, participants will be required to undergo six weeks of running-based endurance training. Immediately post-exercise, participants will be prescribed solutions providing 0.4 grams per kilogram of body mass (g · kg−1) of whey protein hydrolysate plus 0.4 g · kg−1 sucrose, relative to an isocaloric sucrose control (0.8 g · kg−1; Phase I). In Phase II, identical protein supplements will be provided (0.4 + 0.4 g · kg−1 · h−1 of whey protein hydrolysate and sucrose, respectively), with the timing of ingestion manipulated to compare immediate versus overnight recovery feedings. Anthropometric, expired gas, venous blood and muscle biopsy samples will be obtained at baseline and following the six-week training period.DiscussionBy investigating the role of nutrition in enhancing the effects of endurance exercise training, we will provide novel insight regarding nutrient-exercise interactions and the potential to help and develop effective methods to maximize health or performance outcomes in response to regular exercise.Trial registrationCurrent Controlled Trials registration number: ISRCTN27312291 (date assigned: 4 December 2013). The first participant was randomized on 11 December 2013.
Highlights
Performing regular exercise is known to manifest a number of health benefits that mainly relate to cardiovascular and muscular adaptations to allow for greater oxygen extraction and utilization
Performing regular exercise has a multitude of health benefits that stem from cardiovascular and skeletal muscle adaptations that occur in response to the exercise stimulus
Emerging acute mechanistic evidence supports the potential benefit of post-exercise protein feeding in increasing muscle protein synthesis and mitigating proteolysis associated with an endurance exercise bout [6,7,8]
Summary
Performing regular exercise is known to manifest a number of health benefits that mainly relate to cardiovascular and muscular adaptations to allow for greater oxygen extraction and utilization. The current protocol aims to establish whether post-exercise nutrient intake and timing would influence the magnitude of improvements during a prescribed endurance training program. Endurance exercise induces adaptations in the cardiovascular system that allow an increase in capillary number and plasma volume expansion, supporting a greater surface area for gas exchange and the movement of blood, and enhancing oxygen transport to the active muscles [1]. Cycling-based endurance training studies in 2009 and 2011 have proposed the role of protein ingestion in supporting tolerance to intensified training in concurrence with an increase in the magnitude of training adaptations when repeated bouts of exercise are performed [9,10,11]. The time course effects of prolonged post-exercise protein co-ingestion in enhancing the adaptive response to running-based endurance exercise training in adults remains to be established
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
