PMID- 32379237
OWN - NLM
STAT- MEDLINE
DCOM- 20220502
LR  - 20230819
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 36
IP  - 5
DP  - 2022 May 1
TI  - Changes in Knee Extension and Flexion Maximal and Rapid Torque Characteristics 
      During a Collegiate Women's Soccer Season.
PG  - 1389-1395
LID - 10.1519/JSC.0000000000003607 [doi]
AB  - Akehi, K, Palmer, TB, Conchola, EC, Thompson, BJ, Kasl, A, Bice, M, and Unruh, S. 
      Changes in knee extension and flexion maximal and rapid torque characteristics 
      during a collegiate women's soccer season. J Strength Cond Res 36(5): 1389-1395, 
      2022-The purpose of this study was to assess the changes in maximal and rapid 
      torque capacities of the knee extensor and flexor muscles over the course of a 
      competitive season in NCAA Division II women's soccer players. Eighteen female 
      soccer athletes performed 2 maximal voluntary isometric contractions (MVICs) of 
      the knee extensor and flexor muscles before, during, and at the end of the 
      competitive season. Peak torque (PT) and rate of torque development (RTD) at 50 
      (RTD50), 200 (RTD200), and 100-200 (RTD100-200) milliseconds were extracted from 
      each MVIC for both legs. The rapid (RTD50) to maximal force ratio (RTD:PT), 
      hamstring-to-quadriceps (H:Q) strength ratio, and bilateral strength differences 
      were also calculated. Results indicated that PT, RTD50, and RTD200 decreased 
      11-21% from the preseason to the midseason for the knee extensors (p < 0.02) and 
      RTD50 increased approximately 11% from the midseason to the end of season for the 
      knee flexors (p < 0.01). Rate of torque development-to-PT ratios for the knee 
      extensors and flexors increased 12-25% at the end of the season (p < 0.05). Also, 
      H:Q strength ratios using PT, RTD50, and RTD200 increased 12.5-24% after the 
      season started (p = 0.001-0.04). There were no bilateral strength differences 
      (dominant vs. non-dominant limbs) across the season (p > 0.05). These findings 
      suggest that participation in a soccer season can change maximal and rapid torque 
      production of the knee extensors and flexors. Coaches and clinicians should 
      consider incorporating a season-long strength training and maintenance plan for 
      soccer players with the aim to improve athletic performance and minimize the risk 
      of musculoskeletal injuries to the lower extremities.
CI  - Copyright (c) 2020 National Strength and Conditioning Association.
FAU - Akehi, Kazuma
AU  - Akehi K
AD  - Athletic Training/Clinical Kinesiology Laboratory, Department of Kinesiology and 
      Sport Sciences, University of Nebraska at Kearney, Kearney, Nebraska.
FAU - Palmer, Ty B
AU  - Palmer TB
AD  - Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, 
      Texas.
FAU - Conchola, Eric C
AU  - Conchola EC
AD  - Department of Kinesiology and Health Studies, University of Central Oklahoma, 
      Edmond, Oklahoma.
FAU - Thompson, Brennan J
AU  - Thompson BJ
AD  - Department of Kinesiology and Health Science, Utah State University, Logan, Utah; 
      and.
FAU - Kasl, Alexa
AU  - Kasl A
AD  - College of Allied Health, University of Nebraska Medical Center, Kearney, 
      Nebraska.
FAU - Bice, Matthew
AU  - Bice M
AD  - Athletic Training/Clinical Kinesiology Laboratory, Department of Kinesiology and 
      Sport Sciences, University of Nebraska at Kearney, Kearney, Nebraska.
FAU - Unruh, Scott
AU  - Unruh S
AD  - Athletic Training/Clinical Kinesiology Laboratory, Department of Kinesiology and 
      Sport Sciences, University of Nebraska at Kearney, Kearney, Nebraska.
LA  - eng
PT  - Journal Article
DEP - 20200505
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Female
MH  - Humans
MH  - Isometric Contraction/physiology
MH  - Knee Joint
MH  - Lower Extremity
MH  - Muscle Strength/physiology
MH  - Muscle, Skeletal/physiology
MH  - Seasons
MH  - *Soccer/physiology
MH  - Torque
EDAT- 2020/05/08 06:00
MHDA- 2022/05/03 06:00
CRDT- 2020/05/08 06:00
PHST- 2020/05/08 06:00 [pubmed]
PHST- 2022/05/03 06:00 [medline]
PHST- 2020/05/08 06:00 [entrez]
AID - 00124278-202205000-00030 [pii]
AID - 10.1519/JSC.0000000000003607 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2022 May 1;36(5):1389-1395. doi: 
      10.1519/JSC.0000000000003607. Epub 2020 May 5.