European Journal of Applied Physiology

, Volume 116, Issue 1, pp 153–160

Maximal force and tremor changes across the menstrual cycle

  • Matthew S. Tenan
  • Anthony C. Hackney
  • Lisa Griffin
Original Article

DOI: 10.1007/s00421-015-3258-x

Cite this article as:
Tenan, M.S., Hackney, A.C. & Griffin, L. Eur J Appl Physiol (2016) 116: 153. doi:10.1007/s00421-015-3258-x

Abstract

Purpose

Sex hormones have profound effects on the nervous system in vitro and in vivo. The present study examines the effect of the menstrual cycle on maximal isometric force (MVC) and tremor during an endurance task.

Methods

Nine eumenorrheic females participated in five study visits across their menstrual cycle. In each menstrual phase, an MVC and an endurance task to failure were performed. Tremor across the endurance task was quantified as the coefficient of variation in force and was assessed in absolute time and relative percent time to task failure.

Results

MVC decreases 23 % from ovulation to the mid luteal phase of the menstrual cycle. In absolute time, the mid luteal phase has the highest initial tremor, though the early follicular phase has substantially higher tremor than other phases after 150 s of task performance. In relative time, the mid luteal phase has the highest level of tremor throughout the endurance task.

Conclusions

Both MVC and tremor during an endurance task are modified by the menstrual cycle. Performance of tasks and sports which require high force and steadiness to exhaustion may be decreased in the mid luteal phase compared to other menstrual phases.

Keywords

Menstrual cycle Maximal force Tremor Estrogen Progesterone Fatigue 

Abbreviations

ANOVA

Analysis of variance

BBT

Basal body temperature

ERα

Estrogen receptor alpha

GABA

Γ-aminobutyric acid

MVC

Maximal voluntary contraction

Copyright information

© Springer-Verlag Berlin Heidelberg (outside the USA) 2015

Authors and Affiliations

  • Matthew S. Tenan
    • 1
  • Anthony C. Hackney
    • 2
    • 3
  • Lisa Griffin
    • 4
  1. 1.Human Research and Engineering Directorate, RDRL-HRS-BUS Army Research LaboratoryAberdeen Proving GroundUSA
  2. 2.Department of Exercise and Sport ScienceUniversity of North Carolina at Chapel HillChapel HillUSA
  3. 3.Department of Nutrition, School of Public HealthUniversity of North Carolina at Chapel HillChapel HillUSA
  4. 4.Department of Kinesiology and Health EducationUniversity of Texas at AustinAustinUSA

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