PMID- 35126180
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220208
IS  - 1664-042X (Print)
IS  - 1664-042X (Electronic)
IS  - 1664-042X (Linking)
VI  - 12
DP  - 2021
TI  - Relationship Between Isokinetic Lower-Limb Joint Strength, Isometric Time Force 
      Characteristics, and Leg-Spring Stiffness in Recreational Runners.
PG  - 797682
LID - 10.3389/fphys.2021.797682 [doi]
LID - 797682
AB  - Neuromuscular characteristics, such as lower-limb joint strength and the ability 
      to rapidly generate force, may play an important role in leg-spring stiffness 
      regulation. This study aimed to investigate the relationship between isokinetic 
      knee and ankle joint peak torque (PT), the force-time characteristics of 
      isometric mid-thigh pull (IMTP), and leg stiffness (K (leg))/vertical stiffness 
      (K (vert)) in recreationally trained runners. Thirty-one male runners were 
      recruited and underwent three separate tests. In the first session, the body 
      composition, K (leg), and K (vert) at running speeds of 12 and 14 km⋅h(-1) were 
      measured. In the second session, isokinetic knee and ankle joint PT at 60 degrees ⋅s(-1) 
      were tested. The force-time characteristics of the IMTP were evaluated in the 
      final session. Pearson's product-moment correlations, with the Benjamini-Hochberg 
      correction procedure, showed that the knee flexor concentric and eccentric and 
      extensor concentric PT (r = 0.473-0.654, p < 0.05) were moderate to largely 
      correlated with K (leg) and K (vert) at 12 and 14 km⋅h(-1). The knee extensor 
      eccentric PT (r = 0.440, p = 0.050) was moderately correlated with the 14 
      km⋅h(-1) K (vert). The ankle plantar flexor concentric and dorsiflexor eccentric 
      PT (r = 0.506-0.571, p < 0.05) were largely correlated with K (leg) at 12 
      km⋅h(-1). The ankle plantar flexor concentric and eccentric and dorsiflexor 
      eccentric PT (r = 0.436-0.561, p < 0.05) were moderate to largely correlated with 
      K (vert) at 12 and 14 km⋅h(-1). For IMTP testing, high correlation was only found 
      between the IMPT peak force (PF) and K (vert) at 14 km⋅h(-1) (r = 0.510, p = 
      0.014). Thus, superior leg-spring stiffness in recreational runners may be 
      related to increased knee and ankle joint strength, eccentric muscular capacity, 
      and maximal force production.
CI  - Copyright (c) 2022 Chen, Wang, Zhang, Shi, Ding and Li.
FAU - Chen, Shiqin
AU  - Chen S
AD  - School of Physical Education and Sport Training, Shanghai University of Sport, 
      Shanghai, China.
FAU - Wang, Dan
AU  - Wang D
AD  - School of Physical Education and Sport Training, Shanghai University of Sport, 
      Shanghai, China.
FAU - Zhang, Qin
AU  - Zhang Q
AD  - School of Physical Education and Sport Training, Shanghai University of Sport, 
      Shanghai, China.
FAU - Shi, Yue
AU  - Shi Y
AD  - School of Kinesiology, Shanghai University of Sport, Shanghai, China.
FAU - Ding, Haiyong
AU  - Ding H
AD  - School of Physical Education and Sport Training, Shanghai University of Sport, 
      Shanghai, China.
FAU - Li, Fei
AU  - Li F
AD  - School of Physical Education and Sport Training, Shanghai University of Sport, 
      Shanghai, China.
LA  - eng
PT  - Journal Article
DEP - 20220121
PL  - Switzerland
TA  - Front Physiol
JT  - Frontiers in physiology
JID - 101549006
PMC - PMC8814442
OTO - NOTNLM
OT  - eccentric strength
OT  - isometric mid-thigh pull
OT  - neuromuscular characteristics
OT  - reactive strength
OT  - running performance
COIS- The authors declare that the research was conducted in the absence of any 
      commercial or financial relationships that could be construed as a potential 
      conflict of interest.
EDAT- 2022/02/08 06:00
MHDA- 2022/02/08 06:01
PMCR- 2022/01/21
CRDT- 2022/02/07 05:29
PHST- 2021/10/19 00:00 [received]
PHST- 2021/12/09 00:00 [accepted]
PHST- 2022/02/07 05:29 [entrez]
PHST- 2022/02/08 06:00 [pubmed]
PHST- 2022/02/08 06:01 [medline]
PHST- 2022/01/21 00:00 [pmc-release]
AID - 10.3389/fphys.2021.797682 [doi]
PST - epublish
SO  - Front Physiol. 2022 Jan 21;12:797682. doi: 10.3389/fphys.2021.797682. eCollection 
      2021.