Dietary Protein for Training Adaptation and Body Composition Manipulation in Track and Field Athletes

Dec 4, 2018International journal of sport nutrition and exercise metabolism

Protein Intake and Its Role in Training Benefits and Body Shape Changes in Track and Field Athletes

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Abstract

Track and field athletes aiming for weight maintenance or gain should target protein intakes of approximately 1.6 g·kg body mass (BM)·day.

Inadequate protein intake may hinder training adaptation and performance in track and field athletes.
Current dietary recommendations for protein intake range from 0.8 to 1.0 g·kg BM·day, which may be insufficient for optimal recovery.
Higher protein intakes of around 1.6 g·kg BM·day could support the rapid turnover of protein structures due to intensive training.
Athletes restricting energy intake may need even greater protein levels to preserve lean body mass during weight loss.
The review discusses metabolic changes associated with energy restriction and their impact on protein intake and training adaptation.

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Track and field athletes engage in vigorous training that places stress on physiological systems requiring nutritional support for optimal recovery. Of paramount importance when optimizing recovery nutrition are rehydration and refueling which are covered in other papers in this volume. Here, we highlight the benefits for dietary protein intake over and above requirements set out in various countries at ∼0.8-1.0 g·kg body mass (BM)·dayfor training adaptation, manipulating body composition, and optimizing performance in track and field athletes. To facilitate the remodeling of protein-containing structures, which are turning over rapidly due to their training volumes, track and field athletes with the goal of weight maintenance or weight gain should aim for protein intakes of ∼1.6 g·kg BM·day. Protein intakes at this level would not necessarily require an overemphasis on protein-containing foods and, beyond convenience, does not suggest a need to use protein or amino acid-based supplements. This review also highlights that optimal protein intakes may exceed 1.6 g·kg BM·dayfor athletes who are restricting energy intake and attempting to minimize loss of lean BM. We discuss the underpinning rationale for weight loss in track and field athletes, explaining changes in metabolic pathways that occur in response to energy restriction when manipulating protein intake and training. Finally, this review offers practical advice on protein intakes that warrant consideration in allowing an optimal adaptive response for track and field athletes seeking to train effectively and to lose fat mass while energy restricted with minimal (or no) loss of lean BM. -1 -1 -1 -1 -1 -1

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Dietary Protein for Training Adaptation and Body Composition Manipulation in Track and Field Athletes

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