Abstract:
:Tonic vagal modulation of cardiac period (R-R interval) decreases with advancing age, but is greater in middle-aged and older adults who habitually perform aerobic exercise compared with their sedentary peers. Cardiovagal baroreflex sensitivity also declines markedly with age in sedentary adults but only 50% as much in regularly exercising adults. In previously sedentary middle-aged and older adults, a 3-month program of moderate aerobic exercise increases cardiovagal baroreflex sensitivity by 25%. Tonic (basal) sympathetic nervous system (SNS) activity increases with advancing age in both sedentary and habitually exercising adults. Despite this, SNS beta-adrenergic support of energy metabolism (resting metabolic rate--RMR) declines with age in sedentary individuals. However, SNS beta-adrenergic support of RMR is maintained with age in endurance exercise-trained adults and therefore is much greater in middle-aged and older individuals who exercise regularly compared with their sedentary peers. Thus, regular aerobic (endurance) exercise modulates selective age-associated impairments in autonomic nervous system-physiological function.
journal_name
Int J Sport Nutr Exerc Metabauthors
Seals DR,Monahan KD,Bell C,Tanaka H,Jones PPdoi
10.1123/ijsnem.11.s1.s189keywords:
subject
Has Abstractpub_date
2001-12-01 00:00:00pages
S189-95eissn
1526-484Xissn
1543-2742journal_volume
11 Supplpub_type
杂志文章,评审abstract::This study was designed to compare the effects of energy-matched carbohydrate (CHO) and carbohydrate-protein (CHO-PRO) supplements on cycling time-trial performance. Twelve competitive male cyclists and triathletes each completed 2 trials in a randomized and counterbalanced order that were separated by 5-10 d and appl...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijsnem.20.1.34
更新日期:2010-02-01 00:00:00
abstract::Food intolerance is becoming increasingly prevalent, and increasing numbers of athletes have celiac disease. This poses challenges as dietary recommendations for exercise are largely based on gluten-containing carbohydrate-rich foods. The K4 cycle race covers 384 km around the Coromandel Peninsula, New Zealand. Lack o...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.22.4.304
更新日期:2012-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijsnem.18.1.1
更新日期:2008-02-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章
doi:10.1123/ijsnem.2013-0107
更新日期:2015-02-01 00:00:00
abstract::The purpose of this study was to assess the influence of rehydration with a caffeinated beverage during nonexercise periods on hydration status throughout consecutive practices in the heat. Ten (7 women, 3 men) partially heat- acclimated athletes (age 24 +/-1y, body fat 19.2 +/- 2 %, weight 68.4 +/- 4.0 kg, height 170...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2004-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.11.s1.s119
更新日期:2001-12-01 00:00:00
abstract:BACKGROUND:Functional hypothalamic amenorrhea is common among female athletes and may be difficult to treat. Restoration of menses (ROM) is crucial to prevent deleterious effects to skeletal and reproductive health. OBJECTIVES:To determine the natural history of menstrual disturbances in female college athletes manage...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.22.2.98
更新日期:2012-04-01 00:00:00
abstract::The term Relative Energy Deficiency in Sport was introduced by the International Olympic Committee in 2014. It refers to the potential health and performance consequences of inadequate energy for sport, emphasizing that there are consequences of low energy availability (EA; typically defined as <30 kcal·kg-1 fat-free ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.2018-0127
更新日期:2018-07-01 00:00:00
abstract:AIMS/OBJECTIVES:To evaluate the current literature via systematic review to ascertain whether amino acids/vitamins provide any influence on musculotendinous healing and if so, by which physiological mechanisms. METHODS:EBSCO, PubMed, ScienceDirect, Embase Classic/Embase, and MEDLINE were searched using terms including...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.2017-0267
更新日期:2018-05-01 00:00:00
abstract::Whenever athletes willfully or accidentally ingest performance-enhancing drugs or other banned substances (such as drugs of abuse), markers of those drugs can be detected in biological samples (e.g., biofluids: urine, saliva, blood); in the case of some drugs, that evidence can be apparent for many weeks following the...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 历史文章,杂志文章,评审
doi:10.1123/ijsnem.2014-0185
更新日期:2015-08-01 00:00:00
abstract::The aim of this study was to evaluate the frequency of dietary supplement (DS) use among elite Finnish athletes in 2002 and 2009. In 2009, the authors also wanted to examine the reasons for athletes' DS use, whether athletes feel they have experienced benefits from their supplement use, and whether athletes had had an...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.21.4.271
更新日期:2011-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.10.4.434
更新日期:2000-12-01 00:00:00
abstract:PURPOSE:Increased core temperature (T(c)), impaired cardiovascular function, and dehydration contribute to fatigue during prolonged exercise in the heat. Although many studies have examined mechanisms addressing these factors, few have investigated the effect of cold beverage temperature on thermoregulation and exercis...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.20.2.166
更新日期:2010-04-01 00:00:00
abstract::This study investigated the effect of a fed or fasted state on the salivary immunoglobulin A (s-IgA) response to prolonged cycling. Using a randomized, crossover design, 16 active adults (8 men and 8 women) performed 2 hr of cycling on a stationary ergometer at 65% of maximal oxygen uptake on 1 occasion after an overn...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.19.3.209
更新日期:2009-06-01 00:00:00
abstract::Regional fat distribution (RFD) has been associated with metabolic derangements in populations with obesity. For example, upper body fat patterning is associated with higher levels of free testosterone (FT) and lower levels of sex-hormone binding globulin (SHBG). We sought to determine the extent to which this relatio...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.11.4.451
更新日期:2001-12-01 00:00:00
abstract::With the increasing knowledge about the role of nutrition in increasing exercise performance, it has become clear over the last 2 decades that amino acids, protein, and protein hydrolysates can play an important role. Most of the attention has been focused on their effects at a muscular level. As these nutrients are i...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.17.s1.s1
更新日期:2007-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.19.4.340
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:To examine the effects of resistance training on hematological and selected indices of iron status in 17 women aged 54-71 years and 18 men aged 56-69 years. DESIGN:Tests and evaluations were done before and after all subjects participated in a resistance-training program twice weekly for 12 weeks. RESULTS:T...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.11.3.287
更新日期:2001-09-01 00:00:00
abstract::Omega-3 fatty acid (n-3 FA) supplementation could promote adaptation to soccer-specific training. We examined the impact of a 4-week period of n-3 FA supplementation during training on adaptations in 1RM knee extensor strength, 20-m sprint speed, vertical jump power, and anaerobic endurance capacity (Yo-Yo test) in co...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijsnem.2016-0325
更新日期:2017-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
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更新日期:2017-02-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2013-0218
更新日期:2014-12-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0323
更新日期:2020-05-26 00:00:00
abstract::Caffeine and creatine are ingredients in the most popular dietary supplements consumed by soccer players. However, some products may not contain the disclosed amounts of the ingredients listed on the label, compromising the safe usage and the effectiveness of these supplements. Therefore, the aim of this study was to ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2015-0134
更新日期:2016-08-01 00:00:00
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journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.17.2.152
更新日期:2007-04-01 00:00:00
abstract::Food-based diet indices provide a practical, rapid, and inexpensive way of evaluating dietary intake. Rather than nutrients, diet indices assess the intake of whole foods and dietary patterns, and compare these with nutrition guidelines. An athlete-specific diet index would offer an efficient and practical way to asse...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0098
更新日期:2019-10-17 00:00:00
abstract:PURPOSE:The purpose of this study was to investigate the effect of acute and 4-week Rhodiola rosea intake on physical capacity, muscle strength, speed of limb movement, reaction time, and attention. METHODS: PHASE I:A double blind placebo-controlled randomized study (n= 24) was performed, consisting of 2 sessions (2 ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1123/ijsnem.14.3.298
更新日期:2004-06-01 00:00:00
abstract::We investigated the effectiveness of two lifestyle modification programs of exercise training and nutritional intake (ad libitum) on improving body composition and disease risk in overweight/obese men and women. Sixty-three subjects were weight matched and assigned to one of three groups for a 12 wk intervention: (1) ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijsnem.16.4.373
更新日期:2006-08-01 00:00:00
abstract::This study examined the physiological effects of crushed ice ingestion before steady state exercise in the heat. Ten healthy males with age (23 ± 3 y), height (176.9 ± 8.7 cm), body-mass (73.5 ± 8.0 kg), VO2peak (48.5 ± 3.6 mL∙kg∙min-1) participated in the study. Participants completed 60 min of cycling at 55% of thei...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2016-0215
更新日期:2017-06-01 00:00:00
abstract:PURPOSE:To investigate the effects of polysaccharide from Gynostemma pentaphyllum on antioxidant activity in skeletal muscle of mice exercised to exhaustion. METHODS:Three polysaccharide fractions were obtained from G. pentaphyllum polysaccharide (GPP) and termed GPP1-a, GPP2-b, and GPP3-a. Gas chromatography (GC) and...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.22.6.479
更新日期:2012-12-01 00:00:00
abstract::Discrepancies in energy and macronutrient intakes between tests are apparent even when a solid prepackaged diet (Sdiet) is used to standardize dietary intake for preexperimental trials. It is unknown whether a liquid prepackaged diet (Ldiet) leads to improved adherence, resulting in lower variability in energy and mac...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijsnem.2018-0259
更新日期:2019-09-01 00:00:00