Abstract:
PURPOSE:The purpose of this study was to investigate the influence of different cycling cadences on metabolic and kinematic parameters during subsequent running. METHODS:Eight triathletes performed two incremental tests (running and cycling) to determine maximal oxygen uptake (VO2max) and ventilatory threshold (VT) values, a cycling test to assess the energetically optimal cadence (EOC), three cycle-run succession sessions (C-R, 30-min cycle + 15-min run), and one 45-min isolated run (IR). EOC, C-R, and IR sessions were realized at an intensity corresponding to VT + 5%. During the cycling bouts of C-R sessions, subjects had to maintain one of the three pedaling cadences corresponding to the EOC (72.5 +/- 4.6 rpm), the freely chosen cadence (FCC; 81.2 +/- 7.2 rpm), and the theoretical mechanical optimal cadence (MOC, 90 rpm; Neptune and Hull, 1999). RESULTS:Oxygen uptake (VO2) increased during the 30-min cycling only at MOC (+12.0%) and FCC (+10.4%). During the running periods of C-R sessions, VO2, minute ventilation, and stride-rate values were significantly higher than during the IR session (respectively, +11.7%, +15.7%, and +7.2%). Furthermore, a significant effect of cycling cadence was found on VO2 variability during the 15-min subsequent run only for MOC (+4.1%) and FCC (+3.6%). CONCLUSION:The highest cycling cadences (MOC, FCC) contribute to an increase in energy cost during cycling and the appearance of a VO2 slow component during subsequent running, whereas cycling at EOC leads to a stability in energy cost of locomotion with exercise duration. Several hypotheses are proposed to explain these results such as changes in fiber recruitment or hemodynamic modifications during prolonged exercise.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Vercruyssen F,Brisswalter J,Hausswirth C,Bernard T,Bernard O,Vallier JMdoi
10.1097/00005768-200203000-00022subject
Has Abstractpub_date
2002-03-01 00:00:00pages
530-6issue
3eissn
0195-9131issn
1530-0315journal_volume
34pub_type
临床试验,杂志文章,随机对照试验abstract:PURPOSE:Little is known of the potential long-term gait alterations that occur after an anterior cruciate ligament (ACL) reconstruction. In particular, variables, such as impact loading, which have been previously associated with joint deterioration, have not been studied in walking and running after an ACL reconstruct...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0b013e318285c6b6
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abstract::MRI is an excellent noninvasive method of diagnosing difficult shoulder problems. Although usually not needed for classic primary impingement syndrome or clinically obvious rotator cuff tears, MRI may be helpful in diagnosing secondary causes of impingement or in some cases involving partial rotator cuff tears. Some s...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,评审
doi:10.1097/00005768-199804001-00002
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abstract:PURPOSE:This study aimed to examine the link between stress (measured via salivary cortisol and testosterone), cognition (measured via pupillometry, with greater pupil constriction and reduced pupil constriction latency associated with increased attention and improved information processing), and motor skill capacity (...
journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/MSS.0000000000002397
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abstract:INTRODUCTION:The significant sex disparity in sports-related knee injuries may be due to underlying differences in motor control. Although the development of sex-specific movement patterns is likely multifactorial, this study specifically focuses on the potential modulatory role of sex hormones. PURPOSE:This study aim...
journal_title:Medicine and science in sports and exercise
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doi:10.1249/MSS.0000000000000134
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journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1249/01.MSS.0000058367.66796.35
更新日期:2003-04-01 00:00:00
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章
doi:10.1249/mss.0b013e318043a235
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journal_title:Medicine and science in sports and exercise
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journal_title:Medicine and science in sports and exercise
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journal_title:Medicine and science in sports and exercise
pub_type: 杂志文章,随机对照试验
doi:10.1249/MSS.0000000000001223
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journal_title:Medicine and science in sports and exercise
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Medicine and science in sports and exercise
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doi:10.1249/MSS.0b013e3181a071cf
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journal_title:Medicine and science in sports and exercise
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doi:10.1249/MSS.0b013e318188446a
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journal_title:Medicine and science in sports and exercise
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journal_title:Medicine and science in sports and exercise
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doi:10.1249/01.mss.0000179102.17183.6b
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journal_title:Medicine and science in sports and exercise
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journal_title:Medicine and science in sports and exercise
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更新日期:1994-09-01 00:00:00
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journal_title:Medicine and science in sports and exercise
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