Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Changes in Mechanical Properties of Thigh and Lower Leg Musculotendons during the Early Follicular and Ovulatory Phases

Rina Saito
,
Mayuu Shagawa
,
Yuzuka Sugimoto
,
Tomoki Hirai
,
Koyo Kato
,
Chie Sekine
ORCID logo ,
Hrotake Yokota
ORCID logo ,
Ryo Hirabayashi
ORCID logo ,
Tomonobu Ishigaki
,
Hiroshi Akuzawa
,
Ryoya Togashi
,
Yuki Yamada
,
Haruki Osanami
,
Mutsuaki Edama
* ORCID logo
Version 1 : Received: 7 January 2023 / Approved: 9 January 2023 / Online: 9 January 2023 (06:50:28 CET)

How to cite: Saito, R.; Shagawa, M.; Sugimoto, Y.; Hirai, T.; Kato, K.; Sekine, C.; Yokota, H.; Hirabayashi, R.; Ishigaki, T.; Akuzawa, H.; Togashi, R.; Yamada, Y.; Osanami, H.; Edama, M. Changes in Mechanical Properties of Thigh and Lower Leg Musculotendons during the Early Follicular and Ovulatory Phases. Preprints 2023, 2023010146. https://doi.org/10.20944/preprints202301.0146.v1 Saito, R.; Shagawa, M.; Sugimoto, Y.; Hirai, T.; Kato, K.; Sekine, C.; Yokota, H.; Hirabayashi, R.; Ishigaki, T.; Akuzawa, H.; Togashi, R.; Yamada, Y.; Osanami, H.; Edama, M. Changes in Mechanical Properties of Thigh and Lower Leg Musculotendons during the Early Follicular and Ovulatory Phases. Preprints 2023, 2023010146. https://doi.org/10.20944/preprints202301.0146.v1

Abstract

The purpose of this study was to determine changes in the mechanical properties of the thigh and lower leg musculature during the early follicular and ovulatory phases. Subjects were 15 female university students with normal menstrual cycles. The early follicular and ovulatory phases were estimated by the basal body temperature method, ovulation kits, and salivary estradiol concentration measurement. The MyotonPRO digital palpation device (Myoton AS, Tallinn, Estonia) was used to measure muscle and tendon stiffness in the early follicular and ovulatory phases. Measurement sites were the rectus femoris (RF), vastus medialis (VM), patellar tendon (PT), medial head of gastrocnemius, soleus, and Achilles tendon. No significant differences in stiffness of all muscle tendons were identified between the early follicular and ovulatory phases. In the ovulatory phase, a significant positive correlation was seen between stiffness of RF and PT, and between stiffness of VM and PT. These results suggest that the stiffness of muscles and tendons of anterior sites of the thigh and posterior sites of the lower leg may not change between the early follicular and ovulatory phases. During the ovulatory phase, tendons may also be stiffer in individuals with stiffer anterior thigh muscles.

Keywords

menstrual cycle; mechanical properties; stiffness; estradiol; musculotendon complex

Subject

Physical Sciences, Biophysics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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