PMID- 27580153
OWN - NLM
STAT- MEDLINE
DCOM- 20171019
LR  - 20180302
IS  - 1530-0315 (Electronic)
IS  - 0195-9131 (Linking)
VI  - 49
IP  - 1
DP  - 2017 Jan
TI  - Different Effect of Local and General Fatigue on Knee Joint Stiffness.
PG  - 173-182
AB  - PURPOSE: This study aimed to investigate the influence of locally and generally 
      induced fatigue on the stiffness properties of the knee joint. METHODS: 
      Twenty-two male (24.9 +/- 4.5 yr, 1.78 +/- 0.06 m, 75.4 +/- 6.4 kg, 23.9 +/- 1.8 kg.m) 
      and 18 female (21.1 +/- 1.5 yr, 1.66 +/- 0.05 m, 63.4 +/- 6.5 kg, 22.9 +/- 2.5 kg.m) 
      amateur athletes participated. Peak torque (PT) of the knee extensor musculature, 
      muscle stiffness (MS) of the vastus lateralis, and musculoarticular stiffness 
      (MAS) of the knee joint were assessed pre- and postlocally and generally induced 
      fatigue (undertaken on two separate days with a 1-wk interval). RESULTS: Males 
      were characterized by higher values of MAS, relaxed and contracted MS, normalized 
      PT (PT/body mass), and normalized MAS (MAS/external load) irrespective of time 
      point (P < 0.05). LOCALLY INDUCED FATIGUE: Contracted MS increased more (P < 
      0.01) and normalized PT decreased more (P = 0.03) in males than in females 
      postfatigue. Significant increases occurred in MAS in females (P = 0.01); relaxed 
      MS (males, P < 0.001; females, P < 0.001), contracted MS (males, P < 0.001; 
      females, P = 0.04), and normalized MAS (males, P = 0.001; females, P = 0.01) in 
      both sexes; and normalized contracted MS (contracted MS/external load) in males 
      (P < 0.001). Normalized PT decreased significantly in males (P < 0.01) 
      postfatigue. GENERALLY INDUCED FATIGUE: Contracted MS (P = 0.01) and MAS (P = 
      0.05) decreased significantly in males post-fatigue. CONCLUSION: The stiffness 
      properties of the knee joint are influenced by locally and generally induced 
      fatigue, with different responses being observed in males and females.
FAU - Wang, Dan
AU  - Wang D
AD  - 1School of Public Health, Physiotherapy and Sports Science, University College 
      Dublin, Dublin, IRELAND; 2The No. 2 Clinical Medicine School, Nanjing University 
      of Chinese Medicine, Nanjing, Jiang Su Province, CHINA; and 3Institute for Sport 
      and Health, University College Dublin, Dublin, IRELAND.
FAU - DE Vito, Giuseppe
AU  - DE Vito G
FAU - Ditroilo, Massimiliano
AU  - Ditroilo M
FAU - Delahunt, Eamonn
AU  - Delahunt E
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Med Sci Sports Exerc
JT  - Medicine and science in sports and exercise
JID - 8005433
SB  - IM
MH  - Fatigue/*physiopathology
MH  - Female
MH  - Humans
MH  - Knee Joint/*physiology
MH  - Male
MH  - Muscle Fatigue/*physiology
MH  - Muscle, Skeletal/physiology
MH  - Sex Factors
MH  - Young Adult
EDAT- 2016/09/01 06:00
MHDA- 2017/10/20 06:00
CRDT- 2016/09/01 06:00
PHST- 2016/09/01 06:00 [pubmed]
PHST- 2017/10/20 06:00 [medline]
PHST- 2016/09/01 06:00 [entrez]
AID - 10.1249/MSS.0000000000001086 [doi]
PST - ppublish
SO  - Med Sci Sports Exerc. 2017 Jan;49(1):173-182. doi: 10.1249/MSS.0000000000001086.