Evidence map›Paper›PMID 36817736›Full record

ArticleContemporary clinical trials communications2023

Influence of iron supplementation on fatigue, mood states and sweating profiles of healthy non-anemic athletes during a training exercise: A double-blind, randomized, placebo-controlled, parallel-group study.

Mahendra P Kapoor, Masaaki Sugita, Mikiko Kawaguchi, Derek Timm, Aki Kawamura, Aya Abe, Tsutomu Okubo

Open access · goldAbstract read
In one paragraph

Article in Contemporary clinical trials communications, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.

  1. Pooled it
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  5. Review
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  9. Observational
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 1 country.

Mahendra P KapoorTaiyo Kagaku Co., Ltd., Research & Development, Nutrition Division, 1-3 Takaramachi, Yokkaichi, Mie, 510-0844, Japan.
Masaaki SugitaNippon Sport Science University, Faculty of Sport Science, 7-1-1 Fukusawa, Setagaya-Ku, Tokyo, 158 8508, Japan.
Mikiko KawaguchiOtsuma Women's University, Faculty of Home Economics, Department of Food Science, 12 Sanbancho, Chiyoda, Tokyo, 102-8357, Japan.
Derek TimmTaiyo International Inc, 5960 Golden Hills Dr., Minneapolis, MN, 55416, USA.
Aki KawamuraNippon Sport Science University, Faculty of Sport Science, 7-1-1 Fukusawa, Setagaya-Ku, Tokyo, 158 8508, Japan.
Aya AbeTaiyo Kagaku Co., Ltd., Research & Development, Nutrition Division, 1-3 Takaramachi, Yokkaichi, Mie, 510-0844, Japan.
Tsutomu OkuboTaiyo Kagaku Co., Ltd., Research & Development, Nutrition Division, 1-3 Takaramachi, Yokkaichi, Mie, 510-0844, Japan.
Nippon Sport Science University · JPTaiyo Yuden (Japan) · JPOtsuma Women's University · JPTakara (Japan) · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Iron is specifically important to athletes, and attention has grown to the association between sports performance and iron regulation in the daily diets of athletes. The study presents new insights into stress, mood states, fatigue, and sweating behavior among the non-anemic athletes with sweating exercise habits who consumed a routine low dose (3.6 mg/day) of iron supplementation. In this double-blind, randomized, placebo-controlled, parallel-group study, both non-anemic male (N = 51) and female (N = 42) athletes were supplemented either with a known highly bioavailable iron formulation (SunActive® Fe) or placebo during the follow-up training exercise period over four weeks at their respective designated clinical sites. The effect of oral iron consumption was examined on fatigue, stress profiles, as well as the quality of life using the profile of mood state (POMS) test or a visual analog scale (VAS) questionnaire, followed by an exercise and well-being related fatigue-sweat. Also, their monotonic association with stress biomarkers (salivary α-amylase, salivary cortisol, and salivary immunoglobulin A) were determined using spearman's rank correlation coefficient test. Repeated measure multivariate analysis of variance (group by time) revealed that the total mood disturbance (TMD) score was significantly lower (P = 0.016; F = 6.26) between placebo and iron supplementation groups over the four weeks study period among female athletes. Also, a significant reduction in tired feeling/exhaustion after the exercise (P = 0.05; F = 4.07) between the placebo and iron intake groups was noticed. A significant within-group reduction (P ≤ 0.05) was noticed in the degree of sweat among both male and female athletes after 2 and 4 weeks of iron supplementation, while athletes of the placebo intake group experienced a non-significant within-group reduction in the degree of sweat

Indexed as

ExerciseFatigueIron supplementationNon-anemic athletesProfile of mood states (POMS)Salivary biomarkersSweating

Identifiers

PMID36817736
PMCPMC9932653
OpenAlexW4318938820

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.