{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23564"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23564","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Cardiovascular responses to sustained isometric force production of the finger flexor and knee extensor muscle groups in weight-trained and untrained young men","abstract":"The purpose of this study was to investigate whether the cardiovascular responses to isometric force production differed significantly between weight-trained and untrained men. Thus, the cardiovascular responses to sustained isometric force production were investigated in 17 weight-trained (age = 23.5 $\\pm$ 2.9 yrs.) and 17 untrained (age = 25.8 $\\pm$ 4.1 yrs.) healthy, young men. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and stroke volume (SV) were measured, with the subject sitting, every 30 seconds during one minute of rest, during isometric force production at 40% of maximal force production by the right finger flexors (FF) and right knee extensors (KE) to muscle fatigue, and during one minute of recovery. Moreover, mean arterial blood pressure (MAP = SBP $-$ DBP/3 + DBP), cardiac output (CO = HR $\\times$ SV), and total peripheral resistance (TPR = MAP/CO) were derived for each recording period. Multivariate analysis of variance (MANOVA) was used to statistically analyze the significance (p $\\le$.05) of the mean differences between subject groups (weight-trained and untrained) and muscle groups (finger flexors and knee extensors) for the changes in the dependent variables, from rest to 30 seconds of sustained isometric force production, and from rest to fatigue. The changes in blood pressures, HR, and SV, from rest to 30 seconds of isometric force production were not significantly different between weight-trained and untrained subjects; however, changes in CO were significantly greater while changes in TPR were significantly smaller in the weight-trained compared to the untrained men. Changes from rest to fatigue in blood pressure were not significantly different between subject groups. However, the changes in CO, from rest to fatigue, were significantly larger while the changes in TPR were significantly smaller in the weight-trained compared to the untrained subjects during both finger flexion and knee extension exercises. The differences in CO and TPR responses between subject groups might indicate differences in the neural mechanisms which regulate the cardiovascular responses to sustained isometric force production.","abstract_html":"The purpose of this study was to investigate whether the cardiovascular responses to isometric force production differed significantly between weight-trained and untrained men. Thus, the cardiovascular responses to sustained isometric force production were investigated in 17 weight-trained (age = 23.5 $\\pm$ 2.9 yrs.) and 17 untrained (age = 25.8 $\\pm$ 4.1 yrs.) healthy, young men. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and stroke volume (SV) were measured, with the subject sitting, every 30 seconds during one minute of rest, during isometric force production at 40% of maximal force production by the right finger flexors (FF) and right knee extensors (KE) to muscle fatigue, and during one minute of recovery. Moreover, mean arterial blood pressure (MAP = SBP $-$ DBP/3 + DBP), cardiac output (CO = HR $\\times$ SV), and total peripheral resistance (TPR = MAP/CO) were derived for each recording period. Multivariate analysis of variance (MANOVA) was used to statistically analyze the significance (p $\\le$.05) of the mean differences between subject groups (weight-trained and untrained) and muscle groups (finger flexors and knee extensors) for the changes in the dependent variables, from rest to 30 seconds of sustained isometric force production, and from rest to fatigue. The changes in blood pressures, HR, and SV, from rest to 30 seconds of isometric force production were not significantly different between weight-trained and untrained subjects; however, changes in CO were significantly greater while changes in TPR were significantly smaller in the weight-trained compared to the untrained men. Changes from rest to fatigue in blood pressure were not significantly different between subject groups. However, the changes in CO, from rest to fatigue, were significantly larger while the changes in TPR were significantly smaller in the weight-trained compared to the untrained subjects during both finger flexion and knee extension exercises. The differences in CO and TPR responses between subject groups might indicate differences in the neural mechanisms which regulate the cardiovascular responses to sustained isometric force production.","abstract_has_math":true,"creators":["Patrick, Brian Timothy"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Kinesiology","degree_department":null,"school":null,"contributors":["Misner, James E."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T14:18:51Z","date_published":"2011-05-07T14:18:51Z","updated_at":"2026-07-22T22:25:22Z","subjects":["Biology, Animal Physiology","Education, Physical"],"languages":["eng"],"rights":["Copyright 1992 Patrick, Brian Timothy"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9305651","(UMI)AAI9305651"],"render_values":[{"text":"AAI9305651","href":null,"code":true},{"text":"(UMI)AAI9305651","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23564","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Misner, James E."]},{"key":"dc:creator","label":"Author","values":["Patrick, Brian Timothy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T14:18:51Z","10000-01-01","1992"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Kinesiology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Animal Physiology","Education, Physical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1992 Patrick, Brian Timothy"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9305651","(UMI)AAI9305651","http://hdl.handle.net/2142/23564"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The purpose of this study was to investigate whether the cardiovascular responses to isometric force production differed significantly between weight-trained and untrained men. Thus, the cardiovascular responses to sustained isometric force production were investigated in 17 weight-trained (age = 23.5 $\\pm$ 2.9 yrs.) and 17 untrained (age = 25.8 $\\pm$ 4.1 yrs.) healthy, young men. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and stroke volume (SV) were measured, with the subject sitting, every 30 seconds during one minute of rest, during isometric force production at 40% of maximal force production by the right finger flexors (FF) and right knee extensors (KE) to muscle fatigue, and during one minute of recovery. Moreover, mean arterial blood pressure (MAP = SBP $-$ DBP/3 + DBP), cardiac output (CO = HR $\\times$ SV), and total peripheral resistance (TPR = MAP/CO) were derived for each recording period. Multivariate analysis of variance (MANOVA) was used to statistically analyze the significance (p $\\le$.05) of the mean differences between subject groups (weight-trained and untrained) and muscle groups (finger flexors and knee extensors) for the changes in the dependent variables, from rest to 30 seconds of sustained isometric force production, and from rest to fatigue. The changes in blood pressures, HR, and SV, from rest to 30 seconds of isometric force production were not significantly different between weight-trained and untrained subjects; however, changes in CO were significantly greater while changes in TPR were significantly smaller in the weight-trained compared to the untrained men. Changes from rest to fatigue in blood pressure were not significantly different between subject groups. However, the changes in CO, from rest to fatigue, were significantly larger while the changes in TPR were significantly smaller in the weight-trained compared to the untrained subjects during both finger flexion and knee extension exercises. The differences in CO and TPR responses between subject groups might indicate differences in the neural mechanisms which regulate the cardiovascular responses to sustained isometric force production.","The changes in blood pressure, HR, and CO, from rest to 30 seconds of sustained isometric force production, were significantly greater during knee extension compared to finger flexion; however, at fatigue, only the changes in HR and CO were significantly different (KE $>$ FF) between tasks. The differences between tasks in the HR and CO responses to sustained isometric force production might be due to differences in the amount of active muscle mass, and thus, differences in the blood flow requirements.","Made available in DSpace on 2011-05-07T14:18:51Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9305651.pdf: 5968280 bytes, checksum: 4de8a89d9759df9e751299e5d831a2c8 (MD5) Previous issue date: 1992","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:05:19Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:31:17-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Cardiovascular responses to sustained isometric force production of the finger flexor and knee extensor muscle groups in weight-trained and untrained young men"]}]}],"canonical_facts":{"dc:contributor":["Misner, James E."],"dc:creator":["Patrick, Brian Timothy"],"dc:date":["2011-05-07T14:18:51Z","10000-01-01","1992"],"dc:description":["The purpose of this study was to investigate whether the cardiovascular responses to isometric force production differed significantly between weight-trained and untrained men. Thus, the cardiovascular responses to sustained isometric force production were investigated in 17 weight-trained (age = 23.5 $\\pm$ 2.9 yrs.) and 17 untrained (age = 25.8 $\\pm$ 4.1 yrs.) healthy, young men. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and stroke volume (SV) were measured, with the subject sitting, every 30 seconds during one minute of rest, during isometric force production at 40% of maximal force production by the right finger flexors (FF) and right knee extensors (KE) to muscle fatigue, and during one minute of recovery. Moreover, mean arterial blood pressure (MAP = SBP $-$ DBP/3 + DBP), cardiac output (CO = HR $\\times$ SV), and total peripheral resistance (TPR = MAP/CO) were derived for each recording period. Multivariate analysis of variance (MANOVA) was used to statistically analyze the significance (p $\\le$.05) of the mean differences between subject groups (weight-trained and untrained) and muscle groups (finger flexors and knee extensors) for the changes in the dependent variables, from rest to 30 seconds of sustained isometric force production, and from rest to fatigue. The changes in blood pressures, HR, and SV, from rest to 30 seconds of isometric force production were not significantly different between weight-trained and untrained subjects; however, changes in CO were significantly greater while changes in TPR were significantly smaller in the weight-trained compared to the untrained men. Changes from rest to fatigue in blood pressure were not significantly different between subject groups. However, the changes in CO, from rest to fatigue, were significantly larger while the changes in TPR were significantly smaller in the weight-trained compared to the untrained subjects during both finger flexion and knee extension exercises. The differences in CO and TPR responses between subject groups might indicate differences in the neural mechanisms which regulate the cardiovascular responses to sustained isometric force production.","The changes in blood pressure, HR, and CO, from rest to 30 seconds of sustained isometric force production, were significantly greater during knee extension compared to finger flexion; however, at fatigue, only the changes in HR and CO were significantly different (KE $>$ FF) between tasks. The differences between tasks in the HR and CO responses to sustained isometric force production might be due to differences in the amount of active muscle mass, and thus, differences in the blood flow requirements.","Made available in DSpace on 2011-05-07T14:18:51Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9305651.pdf: 5968280 bytes, checksum: 4de8a89d9759df9e751299e5d831a2c8 (MD5) Previous issue date: 1992","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:05:19Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:31:17-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9305651","(UMI)AAI9305651","http://hdl.handle.net/2142/23564"],"dc:language":["eng"],"dc:rights":["Copyright 1992 Patrick, Brian Timothy"],"dc:subject":["Biology, Animal Physiology","Education, Physical"],"dc:title":["Cardiovascular responses to sustained isometric force production of the finger flexor and knee extensor muscle groups in weight-trained and untrained young men"],"dc:type":["text"],"thesis:degree_discipline":["Kinesiology"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:22Z"}