Abstract：
PURPOSE:Studies have demonstrated that a combination of mental and physical challenge can elicit exacerbated state anxiety, effort sense, and cortisol responses above that of a single stimulus. However, an analysis of the effects of aerobic fitness on the responses of cortisol to concurrent mental and physical stress between below average and above average fitness individuals has not been conducted. This study examined the effects of a combination of acute mental challenges and physical stress on psychological and cortisol responses between eight individuals of below average fitness (low fit (LF), VO2max = 36.58 ± 3.36 mL·kg(-1)·min(-1)) and eight individuals of above average fitness (high fit (HF), VO2max = 51.18 ± 2.09 mL·kg(-1)·min). METHODS:All participants completed two experimental conditions. An exercise-alone condition (EAC) consisted of cycling at 60% VO2max for 37 min, and a dual-challenge condition (DCC) included concurrent participation in a mental challenge for 20 min while cycling. RESULTS:The DCC resulted in increases in state anxiety (P = 0.018), perceived overall workload (P = 0.001), and exacerbated cortisol responses (P = 0.04). Furthermore, LF participants had a greater overall cortisol response in the DCC compared with the EAC (DCC = 346.83 ± 226.92; EAC = -267.46 ± 132.32; t7 = 2.49, P = 0.04), whereas HF participants demonstrated no difference between conditions (DCC = 38.91 ± 147.01; EAC = -324.60 ± 182.78; t7 = 1.68, P = 0.14). DISCUSSION:LF individuals seem to demonstrate unnecessary and unfavorable responses to the DCC compared with HF individuals, particularly concerning cortisol. The exacerbated cortisol responses in LF individuals have implications for harmful consequences such as increased risk of cardiovascular disease.
journal_name
Med Sci Sports Exercjournal_title
Medicine and science in sports and exerciseauthors
Webb HE,Rosalky DS,Tangsilsat SE,McLeod KA,Acevedo EO,Wax Bdoi
10.1249/MSS.0b013e318270b381subject
Has Abstractpub_date
2013-02-01 00:00:00pages
379-86issue
2eissn
0195-9131issn
1530-0315journal_volume
45pub_type
杂志文章abstract：PURPOSE AND METHODS:It is commonly recognized that there is familial aggregation for physical activity level. However, the genes and sequence variants responsible for the familial clustering have not been investigated. We performed a genome-wide linkage scan based on 432 markers typed in 767 subjects from 207 families ...
journal_title：Medicine and science in sports and exercise
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abstract：PURPOSE:To evaluate the effects of intensity of exercise on insulin resistance and the expression of inflammatory proteins in the skeletal muscle of diet-induced obese (DIO) rats after a single bout of exercise. METHODS:In the first exercise protocol, the rats swam for two 3-h bouts, separated by a 45-min rest period ...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
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journal_title：Medicine and science in sports and exercise
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更新日期：1990-04-01 00:00:00
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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
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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.0000000000001984
更新日期：2019-09-01 00:00:00
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
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更新日期：1980-01-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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doi：10.1249/01.mss.0000178103.72988.cd
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journal_title：Medicine and science in sports and exercise
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更新日期：2009-03-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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更新日期：1982-01-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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doi：10.1249/MSS.0b013e3181ef5e67
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0000000000001563
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journal_title：Medicine and science in sports and exercise
pub_type： 临床试验,杂志文章
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更新日期：1997-12-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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doi：10.1249/MSS.0000000000001710
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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.0000000000001594
更新日期：2018-07-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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doi：10.1249/MSS.0000000000002411
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
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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
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doi：
更新日期：1995-08-01 00:00:00
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journal_title：Medicine and science in sports and exercise
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更新日期：1995-05-01 00:00:00
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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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pub_type： 杂志文章
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更新日期：2020-12-01 00:00:00
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journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1995-09-01 00:00:00
abstract：PURPOSE:To evaluate long-term susceptibility to subsequent serious exertional heat illness (EHI) in military recruits who suffered exertional heat illness during basic training. METHODS:We identified Marine Corps members who completed at least 6 months of military service and suffered EHI treated as outpatients (N = 8...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1097/00005768-200109000-00004
更新日期：2001-09-01 00:00:00
abstract：:Bicycling is a complex sport in which an athlete's energy cost is related to two principal forces: air resistance when traveling on flat terrain, and gravity when traveling uphill. Both wind tunnel data and physiological measurements suggest that air resistance scales as body mass to about the 1/3 power. Thus, large c...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章,评审
doi：
更新日期：1994-01-01 00:00:00
abstract：:The purpose of this investigation was to determine the influence of post-exercise carbohydrate (CHO) intake on the rate of muscle glycogen resynthesis after high intensity weight resistance exercise in subjects not currently weight training. In a cross-over design, eight male subjects performed sets (mean = 8.8) of si...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：1993-03-01 00:00:00
abstract：PURPOSE:High internal stress is considered to be a possible cause of heel-pad problems. External biomechanical measurements are used to attempt to understand the causes of heel pain. However, internal stress cannot be measured experimentally. Therefore, the purpose of this study was to quantify the relationship between...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：
更新日期：2005-06-01 00:00:00
abstract：PURPOSE:The frequency of interruptions in sedentary time (sedentary breaks) is an aspect of sedentary behaviors that may be associated with metabolic health outcomes. The aim of this study was to describe the change in the frequency of sedentary breaks during a 10-yr period from ages 5 to 15 yr. METHODS:The longitudin...
journal_title：Medicine and science in sports and exercise
pub_type： 杂志文章
doi：10.1249/MSS.0b013e318245ca20
更新日期：2012-06-01 00:00:00
