Evidence map›Paper›PMID 29464104›Full record

ArticleBMJ open sport & exercise medicine2018

Does ovulation affect performance in tennis players?

Machiko Otaka, Shu-Man Chen, Yong Zhu, Yung-Shen Tsai, Ching-Yu Tseng, Donovan L Fogt, Boon-Hooi Lim, Chih-Yang Huang, Chia-Hua Kuo

Erratum issued Registry-linked trialOpen access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in BMJ open sport & exercise medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. It is linked to trial NCT05028959 (Menstrual Cycle, Amenorrhea and Contraception in Elite Female Athletes), which is not on this map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
0.8field-weighted citation impact, top 31% 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.

NCT05028959 naunknown statusnot on this mapstarted 2021, after this paper: background citation

Menstrual Cycle, Amenorrhea and Contraception in Elite Female Athletes: Impact on Performance, Health and the Athlete's Biological Passport

TypeinterventionalSponsorUniversité Paris-Saclay-Assistance publique des hôpitaux de ParisRan2021 to 2025Enrolled80ConditionsHealthyArmsMultidisciplinary monitoring of healthy women
3 · Its place in the literature

Who cites it

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

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Article
  6. Review
  7. The Impact of Menstrual Cycle Phase on Athletes' Performance: A Narrative Review.International journal of environmental research and public health · 2021
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 7 institutions in 4 countries.

Machiko OtakaLaboratory of Exercise Biochemistry, University of Taipei, Taipei, Taiwan.
Shu-Man ChenDepartment of Physical Education, Shih Hsin University, Taipei, Taiwan.
Yong ZhuSchool of Sports Science, Wenzhou Medical University, Wenzhou, China.
Yung-Shen TsaiLaboratory of Exercise Biochemistry, University of Taipei, Taipei, Taiwan.
Ching-Yu TsengDepartment of Physical Education, Fu Jen Catholic University, New Taipei City, Taiwan.
Donovan L FogtDepartment of Kinesiology, Health and Nutrition, University of Texas at San Antonio, San Antonio, Texas, USA.
Boon-Hooi LimSports Center, University of Malaya, Kuala Lumpur, Malaysia.
Chih-Yang Huang *Department of Physical Education, Shih Hsin University, Taipei, Taiwan.
Chia-Hua Kuo *Laboratory of Exercise Biochemistry, University of Taipei, Taipei, Taiwan.ORCID 0000-0002-1731-4984
University of Taipei · TWAsia University · TWFu Jen Catholic University · TWShih Hsin University · TWThe University of Texas at San Antonio · USUniversity of Malaya · MYWenzhou Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundScientific data on the performance of collegiate female tennis players during the menstrual phases are scarce. TRIAL

designDouble-blind, counter-balanced, crossover trials were conducted to examine whether tennis performance was affected during menstruation, with and without dehydroepiandrosterone sulfate (DHEA-S) supplementation.

methodsTen Division 1 collegiate tennis players (aged 18-22 years) were evenly assigned into placebo-supplemented and DHEA-supplemented (25 mg/day) trials. Treatments were exchanged among the participants after a 28-day washout. Tennis serve performance was assessed on the first day of menstrual bleeding (day 0/28) and on days 7, 14 and 21.

resultsMood state was unaltered during the menstrual cycles in both trials. The lowest tennis serve performance score (speed times accuracy) occurred on day 14 (P=0.06 vs day 0; P=0.01 vs day 21) in both placebo and DHEA trials. Decreased performance on day 14 was explained by decreased accuracy (P=0.03 vs day 0/28; P=0.01 vs day 21), but not velocity itself. Isometric hip strength, but not quadriceps strength, was moderately lower on day 14 (P=0.08). Increasing plasma DHEA-S (by ~65%) during the DHEA-supplemented trial had no effects on mood state, sleep quality or tennis serve performance.

conclusionWe have shown that menses does not affect serve performance of collegiate tennis players. However, the observed decrement in the accuracy of serve speed near ovulation warrants further investigation.

Indexed as

elite performanceevidence-basedtennis

Identifiers

PMID29464104
PMCPMC5812395
OpenAlexW2784977988

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

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.