Evidence map›Paper›PMID 30336598›Full record

ArticleNutrients2018

Eleven Weeks of Iron Supplementation Does Not Maintain Iron Status for an Entire Competitive Season in Elite Female Volleyball Players: A Follow-Up Study.

Juan Mielgo-Ayuso, Michael C Zourdos, Julio Calleja-González, Alfredo Córdova, Diego Fernandez-Lázaro, Alberto Caballero-García

Abstract readControlled Clinical Trial
In one paragraph

Article in Nutrients, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

6 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Iron Status and Physical Performance in Athletes.Life (Basel, Switzerland) · 2023
    Review
  6. Review
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

6 authors.

Juan Mielgo-AyusoDepartment of Biochemistry, Molecular Biology and Physiology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. juanfrancisco.mielgo@uva.es.ORCID 0000-0002-6554-4602
Michael C ZourdosDepartment of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA. mzourdos@fau.edu.
Julio Calleja-GonzálezDepartment of Physical Education and Sports, University of Basque Country (UPV-EHU), 1007 Vitoria, Spain. julio.calleja.gonzalez@gmail.com.
Alfredo CórdovaDepartment of Biochemistry, Molecular Biology and Physiology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. a.cordova@bio.uva.es.
Diego Fernandez-LázaroDepartment of Cell Biology, Histology and Pharmacology, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain, diego.fernandez.lazaro@uva.es. diego.fernandez.lazaro@uva.es.
Alberto Caballero-GarcíaDepartment of Anatomy, Faculty of Physical Therapy, University of Valladolid, 42004 Soria, Spain. director@iecscyl.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEven though iron supplementation can be effective, it is necessary to be cautious of toxicity and aim to do no harm, therefore, it is important to examine the length of time the benefits of iron supplementation can be maintained following its cessation. The main purpose of this study was to analyze if iron stores and strength performance were maintained in elite female volleyball players for the final 18 weeks of a competitive season following the cessation of 11 weeks of iron supplementation.

methodsTwenty-two volleyballers (age: 27.0 ± 5.6 years.) were assigned to two groups (iron treatment group-ITG,

resultsAt the end of the previous trial (T11), ITG maintained iron status as measured by hematological parameters (serum iron-sFE, serum ferritin-FER, transferrin saturation index-TSI, and hemogloblin-Hb), however, CG showed a decrease in these markers at T11. Further, from T0 to T11 ITG experienced greater (

conclusionOur findings suggest that the benefits of iron supplementation are not sustained in elite female volleyballers if supplementation is ceased for 18 weeks.

Indexed as

Dietary SupplementsNutritional StatusAdultAnemia, Iron-DeficiencyAthletesCompetitive BehaviorExerciseFemaleFerritinsFerrous CompoundsFollow-Up StudiesHemoglobinsHumansIronMuscle StrengthPhysical FitnessFerritinsFerrous Compoundsferrous sulfateHemoglobinsIronTransferrinexercisefemalehealthiron supplementationvolleyball eleven weeks of iron supplementation does not maintain iron status for an entire competitive

Identifiers

PMID30336598
PMCPMC6213587

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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.