Abstract:
:This experiment examined the effect of a moderate dose of caffeine on quadriceps muscle pain during a bout of high-intensity cycling in low- versus high-caffeine-consuming males. College-age men who were low (< or =100 mg/day; n = 12) or high (> or =400 mg/day; n = 13) habitual caffeine consumers ingested caffeine (5 mg/kg body weight) or a placebo in a counterbalanced order and 1 hr later completed 30 min of cycle ergometry at 75-77% of peak oxygen consumption. Perceptions of quadriceps muscle pain, as well as oxygen consumption, heart rate, and work rate, were recorded during both bouts of exercise. Caffeine ingestion resulted in a statistically significant and moderate reduction in quadriceps muscle-pain-intensity ratings during the 30-min bout of high-intensity cycle ergometry compared with placebo ingestion in both low (d = -0.42) and high (d = -0.55) caffeine consumers. The results suggest that caffeine ingestion is associated with a moderate hypoalgesic effect during high-intensity cycling in college-age men who are low or high habitual caffeine consumers, but future work should consider better defining and differentiating pain and effort when examining the effects of caffeine during acute exercise.
journal_name
Int J Sport Nutr Exerc Metabauthors
Gliottoni RC,Meyers JR,Arngrimsson SA,Broglio SP,Motl RWdoi
10.1123/ijsnem.19.2.150subject
Has Abstractpub_date
2009-04-01 00:00:00pages
150-61issue
2eissn
1526-484Xissn
1543-2742journal_volume
19pub_type
杂志文章,随机对照试验abstract::The authors studied the effects of antioxidant diet supplementation with an almond-based beverage on neutrophil antioxidants, nitrite, and protein oxidative alterations after exercise. Fourteen trained male amateur runners were randomly assigned in a double-blind fashion to receive antioxidant supplementation (152 mg/...
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.23.1.31
更新日期:2013-02-01 00:00:00
abstract::The timing of carbohydrate ingestion and how this influences net muscle glycogen utilization and fatigue has only been investigated in prolonged cycling. Past findings may not translate to running because each exercise mode is distinct both in the metabolic response to carbohydrate ingestion and in the practicalities ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0291
更新日期:2020-02-28 00:00:00
abstract::Fluid milk consumed in conjunction with resistance training (RT) provides additional protein and calcium, which may enhance the effect of RT on body composition. However, the literature on this topic is inconsistent with limited data in adolescents. Therefore, we examined the effects of a supervised RT program (6 mo, ...
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.23.4.344
更新日期:2013-08-01 00:00:00
abstract::We investigated the effects of calcium supplementation and physical practice on the bone ultrasound properties and trabecular microarchitecture in children. 160 children aged 8-11 were randomly allocated to active or nonactive groups and to receive either a calcium-phosphate or a placebo powder for 6 months. Skeletal ...
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.16.6.580
更新日期:2006-12-01 00:00:00
abstract::The purpose of this study was to examine the prevalence of disordered eating (DE), menstrual dysfunction (MD), and low bone mineral density (BMD) among US collegiate athletes (n = 112) representing 7 different sports (diving, swimming, x-country, track, tennis, field hockey, and softball) and determine differences in ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.16.1.1
更新日期:2006-02-01 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::This study systematically examined the influence of carbohydrate (sucrose), sodium, and caffeine on the fluid retention potential of beverages under euhydrated conditions, using the beverage hydration index method. Three cohorts, each of 12 young, healthy, active men, ingested 1 L of beverages containing four differen...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2018-0047
更新日期:2018-10-15 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 authors tested the hypothesis that perception of carbohydrate (CHO) availability augments exercise capacity in conditions of reduced CHO availability. Nine males completed a sleep-low train model comprising evening glycogen-depleting cycling followed by an exhaustive cycling protocol the next morning in the fasted...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0275
更新日期:2020-02-04 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
abstract::Vanadium compounds have been shown to have insulin-like properties in rats and non-insulin-dependent diabetic humans. The purpose of the present study was to examine whether the effects of acute and short-term administration of vanadyl sulfate (VA) on insulin sensitivity also exist in healthy active individuals. Five ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.12.4.470
更新日期:2002-12-01 00:00:00
abstract::We investigated the effects of vitamin D3 supplementation on physical performance during winter training in vitamin D insufficient taekwondo athletes. Thirty-five collegiate male and female taekwondo athletes, aged 19-22 years with low serum 25(OH)D concentration (28.8 ± 1.10 nmol/L), were randomly assigned to a vitam...
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.2017-0412
更新日期:2018-11-01 00:00:00
abstract::Agouti-related protein (AGRP) is an orexigenic peptide secreted from the arcuate nucleus (ARC) of the hypothalamus. AGRP increases food intake and plays a role in energy balance, adiposity, weight gain, and growth-hormone release. The objective of the current study was to examine the effects of running exercise on res...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.19.5.473
更新日期:2009-10-01 00:00:00
abstract::This double-blinded, placebo controlled, randomized crossover trial investigated the influence of 2-week mixed flavonoid versus placebo supplementation on oxinflammation markers after a 75-km cycling time trial in 22 cyclists (42.3 ± 1.7 years). Blood samples were collected before and after the 2-week supplementation,...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0171
更新日期:2019-11-21 00:00:00
abstract::Impaired muscle function has been coupled to vitamin D insufficiency in young women and in elderly men and women. Those living at Northern latitudes are at risk for vitamin D insufficiency due to low sun exposure which may be more pronounced among elite swimmers because of their indoor training schedules. We aimed to ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2016-0248
更新日期:2017-10-01 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.2017-0313
更新日期:2018-07-01 00:00:00
abstract::Iron plays an important role in thyroid hormone metabolism; thus, iron deficiency anemia may lead to alterations in resting metabolic rate (RMR). Based on this premise, two iron-deficient-anemic female athletes, 18 (A1) and 21 (A2) years of age, were supplemented with 23 mg/day of elemental iron to assess its effects ...
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::High-intensity intermittent exercise (HIIE) such as the 30-s Wingate test attenuates postprandial triacylglycerol (TG), however, the ability of shorter versions of HIIE to reduce postprandial TG is undetermined. Thus, the effect of 8-s sprinting bouts of HIIE on blood TG levels of 12 females after consumption of a hig...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章
doi:10.1123/ijsnem.2013-0094
更新日期:2014-02-01 00:00:00
abstract::The B-vitamins (thiamin, riboflavin, vitamin B-6) are necessary in the energy-producing pathways of the body, while folate and vitamin B-12 are required for the synthesis of new cells, such as the red blood cells, and for the repair of damaged cells. Active individuals with poor or marginal nutritional status for a B-...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章,评审
doi:10.1123/ijsnem.16.5.453
更新日期:2006-10-01 00:00:00
abstract::Inflammatory markers such as C-reactive protein (CRP), fibrinogen, and white-blood-cell (WBC) count are strongly associated with cardiovascular disease. The authors' purpose was to compare the inflammatory response to a single aerobic-exercise session between individuals of high and moderate fitness. Ten apparently he...
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::Dietary supplementation (SUP) has become a significant part of athletic training. Studies indicate that creatine (Cr) can enhance short-duration, high-intensity activities. This study examined the effect of 21 days of low dose Cr SUP ( approximately 7.7 g/day) and resistance training on force output, power output, dur...
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.10.3.235
更新日期:2000-09-01 00:00:00
abstract::African American (AA) and European American (EA) women often exhibit differences in hemoglobin (Hb) and 25-hydroxyvitamin D [25(OH)D], both of which can be altered by calorie restriction leading to weight loss. Given these known differences, it is of clinical interest to examine the potential for race-specific, advers...
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.2016-0002
更新日期:2017-02-01 00:00:00
abstract::This study determined normative data for sweat rate (SR) and whole-body (WB) sweat sodium concentration [Na+] in athletes indigenous to a tropical climate, categorized by age, gender, and sport classification. We analyzed data from 556 athletes (386 adult and 170 young) in endurance (END), team/ball (TBA), and combat ...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2019-0299
更新日期:2020-05-25 00:00:00
abstract::The Omega-3 Index is defined as erythrocyte eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), and represents an individual's status in these two marine omega-3 fatty acids. A target range of 8 to 11% has been suggested, because values below predispose to cardiovascular events, especially sudden cardiac death...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 杂志文章
doi:10.1123/ijsnem.2014-0041
更新日期:2014-10-01 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::The purpose of this study was to determine the effect of pre-exercise high carbohydrate meals with high glycemic index (HGI) or low glycemic index (LGI) on blood leukocyte redistribution during subsequent endurance exercise. Eight male subjects performed a 90-min run on a treadmill at 70 % VO2max 3 h after ingesting a...
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.14.6.647
更新日期:2004-12-01 00:00:00
abstract:BACKGROUND/OBJECTIVES:To compare the effects of a 3-week supplementation between two different mixtures of antioxidants and placebo on aerobic exercise performance in acute normobaric hypoxia. SUBJECTS/METHODS:Seventeen subjects were randomly assigned in a double-blind fashion to receive a broad-based antioxidants sup...
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.2013-0118
更新日期:2014-04-01 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
abstract::Eight healthy subjects, aged 39.0 ¿ 2.4 years, consumed four 6% carbohydrate-electrolyte solutions containing either one (glucose or fructose) or two transportable carbohydrates in single (glucose + fructose) or bound (sucrose) forms. Solution osmolalities ranged from 250 to 434 mOsm/kg H2O. The test solutions were in...
journal_title:International journal of sport nutrition and exercise metabolism
pub_type: 临床试验,杂志文章
doi:10.1123/ijsnem.10.4.394
更新日期:2000-12-01 00:00:00
abstract::To defend against hydrogen cation accumulation and muscle fatigue during exercise, sodium bicarbonate (NaHCO3) ingestion is commonplace. The individualized dose-response relationship between NaHCO3 ingestion and blood biochemistry is unclear. The present study investigated the bicarbonate, pH, base excess and sodium r...
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.2015-0286
更新日期:2016-10-01 00:00:00