Cargando…

Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase

A higher protein intake is recommended for athletes compared to healthy non-exercising individuals. Additionally, the distribution and quality (i.e., leucine content) of the proteins consumed throughout the day should be optimized. This study aimed to determine the nitrogen balance and distribution...

Descripción completa

Detalles Bibliográficos
Autores principales: Matsuda, Takeshi, Kato, Hiroyuki, Suzuki, Haruka, Mizugaki, Ami, Ezaki, Takahiko, Ogita, Futoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266158/
https://www.ncbi.nlm.nih.gov/pubmed/30463354
http://dx.doi.org/10.3390/nu10111809
_version_ 1783375775389450240
author Matsuda, Takeshi
Kato, Hiroyuki
Suzuki, Haruka
Mizugaki, Ami
Ezaki, Takahiko
Ogita, Futoshi
author_facet Matsuda, Takeshi
Kato, Hiroyuki
Suzuki, Haruka
Mizugaki, Ami
Ezaki, Takahiko
Ogita, Futoshi
author_sort Matsuda, Takeshi
collection PubMed
description A higher protein intake is recommended for athletes compared to healthy non-exercising individuals. Additionally, the distribution and quality (i.e., leucine content) of the proteins consumed throughout the day should be optimized. This study aimed to determine the nitrogen balance and distribution of protein and amino acid intakes in competitive swimmers during the general preparation phase. Thirteen swimmers (age: 19.7 ± 1.0 years; VO(2)max: 63.9 ± 3.7 mL·kg(−1)·min(−1), mean ± standard deviation) participated in a five-day experimental training period. Nutrient intakes were assessed using dietary records. Nitrogen balance was calculated from the daily protein intake and urinary nitrogen excretion. The intake amounts of amino acids and protein at seven eating occasions were determined. The average and population-safe intakes for zero nitrogen balance were estimated at 1.43 and 1.92 g·kg(−1)·day(−1), respectively. The intake amounts of protein and leucine at breakfast, lunch, and dinner satisfied current guidelines for the maximization of muscle protein synthesis, but not in the other four occasions. The population-safe protein intake level in competitive swimmers was in the upper range (i.e., 1.2–2.0 g·kg(−1)·day(−1)) of the current recommendations for athletes. The protein intake distribution and quality throughout the day may be suboptimal for the maximization of the skeletal muscle adaptive response to training.
format Online
Article
Text
id pubmed-6266158
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-62661582018-12-06 Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase Matsuda, Takeshi Kato, Hiroyuki Suzuki, Haruka Mizugaki, Ami Ezaki, Takahiko Ogita, Futoshi Nutrients Article A higher protein intake is recommended for athletes compared to healthy non-exercising individuals. Additionally, the distribution and quality (i.e., leucine content) of the proteins consumed throughout the day should be optimized. This study aimed to determine the nitrogen balance and distribution of protein and amino acid intakes in competitive swimmers during the general preparation phase. Thirteen swimmers (age: 19.7 ± 1.0 years; VO(2)max: 63.9 ± 3.7 mL·kg(−1)·min(−1), mean ± standard deviation) participated in a five-day experimental training period. Nutrient intakes were assessed using dietary records. Nitrogen balance was calculated from the daily protein intake and urinary nitrogen excretion. The intake amounts of amino acids and protein at seven eating occasions were determined. The average and population-safe intakes for zero nitrogen balance were estimated at 1.43 and 1.92 g·kg(−1)·day(−1), respectively. The intake amounts of protein and leucine at breakfast, lunch, and dinner satisfied current guidelines for the maximization of muscle protein synthesis, but not in the other four occasions. The population-safe protein intake level in competitive swimmers was in the upper range (i.e., 1.2–2.0 g·kg(−1)·day(−1)) of the current recommendations for athletes. The protein intake distribution and quality throughout the day may be suboptimal for the maximization of the skeletal muscle adaptive response to training. MDPI 2018-11-20 /pmc/articles/PMC6266158/ /pubmed/30463354 http://dx.doi.org/10.3390/nu10111809 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Matsuda, Takeshi
Kato, Hiroyuki
Suzuki, Haruka
Mizugaki, Ami
Ezaki, Takahiko
Ogita, Futoshi
Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title_full Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title_fullStr Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title_full_unstemmed Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title_short Within-Day Amino Acid Intakes and Nitrogen Balance in Male Collegiate Swimmers during the General Preparation Phase
title_sort within-day amino acid intakes and nitrogen balance in male collegiate swimmers during the general preparation phase
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266158/
https://www.ncbi.nlm.nih.gov/pubmed/30463354
http://dx.doi.org/10.3390/nu10111809
work_keys_str_mv AT matsudatakeshi withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase
AT katohiroyuki withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase
AT suzukiharuka withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase
AT mizugakiami withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase
AT ezakitakahiko withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase
AT ogitafutoshi withindayaminoacidintakesandnitrogenbalanceinmalecollegiateswimmersduringthegeneralpreparationphase