Abstract：
:This study examined the association of blood lactate concentration [La] and heart rate (HR) with ratings of perceived exertion (RPE) during 60 min of steady workload cycling. Physically active college-aged subjects (n = 14) completed an exhaustive cycling test to determine VO(2) (peak) and lactate threshold (2.5 mmol l(-1)). Subjects then cycled for 60 min at the power output associated with 2.5 mmol l(-1) [LA]. HR, [LA], RPE-overall, RPE-legs and RPE-chest were recorded at 5, 10, 20, 30, 40, 50 and 60 min. The 60-min trials were below maximal lactate steady state, with peak lactate concentration occurring at 20 min after which [LA] declined. The 20-min point was therefore considered pivotal, and data at other points were compared to this time point. Repeated measures ANOVA with simple contrasts (alpha = 0.05) showed (a) [LA] at 40, 50 and 60 min was significantly lower than at 20 min, (b) RPE-O and RPE-L were significantly greater at 30, 40, 50 and 60 min than at 20 min, (c) RPE-C was significantly greater at 40, 50 and 60 min than at 20 min, and (d) HR was significantly greater at 30, 40, 50 and 60 min than at 20 min. Significant (P < 0.05) positive correlations were found between HR and RPE-O (r = 0.43), RPE-L (r = 0.48) and RPE-C (r = 0.41) while correlations for [LA]-HR (r = 0.13) and [LA]-RPE (RPE-O: r = -0.11, RPE-L: r = 0.01, RPE-C: r = -0.06) were weak and non-significant. There is a dissociation of RPE and [LA] owing to RPE drift and lactate kinetics in longer duration sub-maximal exercise. Apparently, [LA] is not a strong RPE mediator during extended cycling.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Green JM,McLester JR,Crews TR,Wickwire PJ,Pritchett RC,Redden Adoi
10.1007/s00421-004-1311-2keywords:
subject
Has Abstractpub_date
2005-05-01 00:00:00pages
145-50issue
1-2eissn
1439-6319issn
1439-6327journal_volume
94pub_type
临床试验,杂志文章abstract：:Through our recent studies on heart rate variability (Oida et al. J Appl Physiol 82:1794-1801, 1997; J Gerontol 54A:M219-M224, 1999a; Acta Physiol Scand 165:129-134, 1999b; Acta Physiol Scand 165:421-422, 1999c), we discover that autonomic functions could be assessed quantitatively in time domain by the tone-entropy (...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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pub_type： 杂志文章
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2015-07-01 00:00:00
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2009-12-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-002-0723-0
更新日期：2003-01-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2014-04-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2015-08-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-005-0128-y
更新日期：2006-04-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-016-3366-2
更新日期：2016-07-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00421-003-1030-0
更新日期：2004-05-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2000-06-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
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更新日期：2012-04-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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journal_title：European journal of applied physiology
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2011-09-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
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更新日期：2013-02-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-010-1784-0
更新日期：2011-07-01 00:00:00
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journal_title：European journal of applied physiology
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更新日期：2020-10-01 00:00:00
