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THE RELATIONSHIP BETWEEN MUSCULOSKELETAL STRENGTH, PHYSIOLOGICAL CHARACTERISTICS, AND KNEE KINESTHESIA FOLLOWING FATIGUING EXERCISE

Allison, Katelyn Fleishman and Sell, Timothy C and Abt, John P and Lephart, Scott M and Lovalekar, Mita T and Nagle, Elizabeth F and Crawford, Kim (2012) THE RELATIONSHIP BETWEEN MUSCULOSKELETAL STRENGTH, PHYSIOLOGICAL CHARACTERISTICS, AND KNEE KINESTHESIA FOLLOWING FATIGUING EXERCISE. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Abstract

Fatiguing exercise may result in impaired functional joint stability and increased risk of unintentional injury. While there are several musculoskeletal and physiological characteristics related to fatigue onset, their relationship with proprioceptive changes following fatigue has not been examined. The purpose of this study was to establish the relationship between musculoskeletal and physiological characteristics and changes in proprioception, measured by threshold to detect passive motion (TTDPM), following fatiguing exercise. Twenty, physically active females participated (age: 28.65 ± 5.6 years, height: 165.6 ± 4.3 cm, weight: 61.8 ± 8.0 kg, BMI: 22.5± 2.3 kg/m2, BF: 23.3 ± 5.4%). During Visit 1, subjects completed an exercise history and 24-hour dietary questionnaire, and body composition, TTDPM familiarization, isokinetic knee strength, and maximal oxygen uptake/lactate threshold assessments. During Visit 2, subjects completed TTDPM and isometric knee strength testing prior to and following a fatiguing exercise protocol. Wilcoxon signed rank tests determined TTDPM and isometric knee strength changes from pre- to post- fatigue. Spearman’s rho correlation coefficients determined the relationship between strength and physiological variables with pre- to post-fatigue changes in TTDPM and with pre-fatigue and post-fatigue TTDPM in extension and flexion (α=0.05). No significant differences were demonstrated from pre-fatigue to post-fatigue TTDPM despite a significant decrease in isometric knee flexion strength (P<0.01) and flexion/extension ratio (P<0.05) following fatigue. No significant correlations were observed between strength or physiological variables and changes in TTDPM from pre- to post-fatigue in extension or flexion. Flexion/extension ratio was significantly correlated with pre-fatigue TTDPM in extension (r=-0.231, P<0.05). Peak oxygen uptake was significantly correlated with pre-fatigue (r=-0.500, P<0.01) and post-fatigue (r=-0.520, P<0.05) TTDPM in extension. No significant relationships were demonstrated between musculoskeletal and physiological characteristics and changes in TTDPM following fatigue. The results suggest that highly trained individuals may have better proprioception, and that the high fitness level of subjects in this investigation may have contributed to absence of TTDPM deficits following fatigue despite reaching a high level of perceptual and physiological fatigue. Future studies should consider various subject populations, other musculoskeletal strength characteristics, and different modalities of proprioception to determine the most important contributions to proprioceptive changes following fatigue.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Allison, Katelyn Fleishmankaf14@pitt.eduKAF14
Sell, Timothy Ctcs15@pitt.eduTCS15
Abt, John Pjabt@pitt.eduJABT
Lephart, Scott Mlephart@pitt.eduLEPHART
Lovalekar, Mita Tmital@pitt.eduMITAL
Nagle, Elizabeth Fnagle@pitt.eduNAGLE
Crawford, Kimkcrawfor@pitt.eduKCRAWFOR
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairSell, Timothy Ctcs15@pitt.eduTCS15
Committee MemberLephart, Scott Mlephart@pitt.eduLEPHART
Committee MemberAbt, John Pjabt@pitt.eduJABT
Committee MemberCrawford, Kim kcrawfor@pitt.eduKCRAWFOR
Committee MemberLovalekar, Mita Tmital@pitt.eduMITAL
Committee MemberNagle, Elizabeth Fnagle@pitt.eduNAGLE
Date: 17 September 2012
Date Type: Publication
Defense Date: August 2012
Approval Date: 17 September 2012
Submission Date: 9 August 2012
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 181
Institution: University of Pittsburgh
Schools and Programs: School of Health and Rehabilitation Sciences > Rehabilitation Science
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Proprioception, Kinesthesia, Fatigue, Injury, Exercise Physiology, Sports Medicine
Date Deposited: 17 Sep 2012 16:35
Last Modified: 15 Nov 2016 14:01
URI: http://d-scholarship.pitt.edu/id/eprint/13498

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