Validation of a Photoplethysmographic Heart Rate Monitor: Polar OH1.

abstract：:The purpose of the study was to investigate whether severe fatigue, possibly leading to overreaching, could be diagnosed at an early stage by a combination of parameters. Seven well-trained male subjects (age [mean +/- SD]: 25.3 +/- 4.7 yr; body mass: 76 +/- 6.6 kg; VO2max: 61.1 +/- 7 ml.kg(-1).min(-1)) increased thei...

journal_title：International journal of sports medicine

authors： Rietjens GJ,Kuipers H,Adam JJ,Saris WH,van Breda E,van Hamont D,Keizer HA

更新日期：2005-01-01 00:00:00

abstract：:Physical exercise activates blood coagulation and enhances fibrinolytic activity. To investigate whether these activations of blood coagulation and fibrinolysis are balanced post-exercise and during the period of recovery, 11 moderately active young men were examined immediately after a standardised cycle ergometer te...

journal_title：International journal of sports medicine

authors： Lin X,El-Sayed MS,Waterhouse J,Reilly T

更新日期：1999-04-01 00:00:00

abstract：:Previous studies have demonstrated that full recovery from weight loss may take months or years. The present investigation examined short-term recovery (5 wks "post") of physical performance (muscular strength, muscular power, vertical jump), body composition, metabolic hormones (testosterone, luteinizing hormone, sex...

journal_title：International journal of sports medicine

authors： Nindl BC,Friedl KE,Frykman PN,Marchitelli LJ,Shippee RL,Patton JF

更新日期：1997-07-01 00:00:00

abstract：:Unlike in Europeans and Africans, the relationship between the human guanine nucleotide binding beta polypeptide 3 (GNB3) C825T gene polymorphism (rs5443) and blood pressures is inconsistent in Asians. The aim of the study was to investigate whether the GNB3 genotype demonstrates different associations with resting bl...

journal_title：International journal of sports medicine

authors： Lee JY,Kim SU,Cho JK,Woo SK,Kang HS

更新日期：2009-12-01 00:00:00

abstract：:The study aimed to verify possible associations between game-play running performance and outcomes derived from fitness (running) tests in female futsal players. Sixteen women professional elite futsal players from a 1st division league team (19.2±2 years-old, 4.3±2.1 years of experience) participated. Firstly, a grad...

journal_title：International journal of sports medicine

authors： Palucci Vieira LH,Arins FB,Guglielmo LGA,de Lucas RD,Carminatti LJ,Santiago PRP

更新日期：2021-01-01 00:00:00

abstract：:This study investigated the effects of a training taper on muscle damage indices and performance. Two matched groups of seven male runners each performed two self paced half-marathons on a motorised treadmill. After the first half-marathon one group maintained their normal weekly training volume, while the taper group...

journal_title：International journal of sports medicine

authors： Child RB,Wilkinson DM,Fallowfield JL

更新日期：2000-07-01 00:00:00

abstract：:Considerable interindividual variation in the response of blood pressure to exercise has been found. In this study the response of systolic blood pressure during a progressive maximal bicycle ergometer test was investigated in 747 physically active male subjects over age of 40 years with normal, borderline elevated, a...

journal_title：International journal of sports medicine

authors： Wijnen JA,van Baak MA,Tan ES,Bovens AM,Vrencken JG,Verstappen FT

更新日期：1988-12-01 00:00:00

abstract：:Because previous researchers have reported a reduced lactic acid production that accompanies a delayed or an absent ventilatory threshold (VTh) in water-based exercise, we hypothesized that the metaboreflex, activated by muscle acidosis, might be absent in fin swimming. This motor response, delaying the occurrence of ...

journal_title：International journal of sports medicine

authors： Jammes Y,Delliaux S,Coulange M,Jammes C,Kipson N,Brerro-Saby C,Bregeon F

更新日期：2010-08-01 00:00:00

abstract：:Endocrine and neuromuscular effects of prolonged strength training were investigated in 21 strength-trained male subjects during the course of a 24-week progressive strength training and during a subsequent detraining period of 12 weeks. Maximal isometric leg extensor force increased by 19% (P less than 0.001) during ...

journal_title：International journal of sports medicine

authors： Alén M,Pakarinen A,Häkkinen K,Komi PV

更新日期：1988-06-01 00:00:00

abstract：:The use of aero style handlebars has gained popularity in triathlons and individual time trial events recently. The effect of using these handlebars has only been examined during short term exercise. It was the aim of this investigation to compare time to exhaustion and selected measures of ventilation, gas exchange a...

journal_title：International journal of sports medicine

authors： Berry MJ,Pollock WE,van Nieuwenhuizen K,Brubaker PH

更新日期：1994-01-01 00:00:00

abstract：:The magnitude and pattern of the hematocrit (Hct), hemoglobin (Hb), and plasma volume (PV) responses during and upon recovery from two resistance training protocols based on either a ten-repetition maximum (10 RM) or five-repetition maximum (5 RM) resistance was examined. Twelve college-aged male resistance exercise t...

journal_title：International journal of sports medicine

authors： Craig SK,Byrnes WC,Fleck SJ

更新日期：2008-02-01 00:00:00

abstract：:Here, we compared the maximal lactate steady state velocity (vMLSS) estimated from a single-visit protocol (v5×2000) to the traditional multi-day protocol (vMLSS). Furthermore, we determined whether there was a lactate steady state during the time limits (Tlim) at vMLSS or v5×2000. Eight runners completed a half marat...

journal_title：International journal of sports medicine

authors： Legaz-Arrese A,Carranza-García LE,Serrano-Ostáriz E,González-Ravé JM,Terrados N

更新日期：2011-11-01 00:00:00

abstract：:This study examined the physiological responses to cold stimulus during intermittent high-intensity exercise simulating on-snow alpine ski training. 7 male alpine skiers performed intermittent high-intensity exercises composed of 4 bouts of cycling exercise at 140% VO 2max intensity for 30 s with 10-min rests on a cyc...

journal_title：International journal of sports medicine

authors： Suzuki E,Ohya T,Ito R,Matsumoto T,Kitagawa K

更新日期：2014-05-01 00:00:00

abstract：:The aim of this study was to examine the effect of defensive pressure on movement behaviour during an under-18 basketball game. 20 international male players (age: M=16.05, SD=2.09 years old; weekly practice: M=10.9, SD=1.94 h; playing experience: M=7.1, SD=1.1 years) played two 10-min basketball quarters, using man-t...

journal_title：International journal of sports medicine

authors： Leite NM,Leser R,Gonçalves B,Calleja-Gonzalez J,Baca A,Sampaio J

更新日期：2014-08-01 00:00:00

abstract：:We investigated the effects of hypoxia on matched-severe intensity exercise and on the parameters of the power-duration relationship. Fifteen trained subjects performed in both normoxia and normobaric hypoxia (FiO2=0.13, ~3000 m) a maximal incremental test, a 3 min all-out test (3AOT) and a transition from rest to an ...

journal_title：International journal of sports medicine

authors： Sousa AC,Millet GP,Viana J,Milheiro J,Reis V

更新日期：2021-01-18 00:00:00

abstract：:The aim of this study was to determine if stepping cadence when controlling for total steps has a differential impact on regional vascular function. 16 young adults (21±2 years) performed fast (125 steps per min) and slow (80 steps per min) walking for a total of 3 000 steps on separate days. Doppler ultrasound was us...

journal_title：International journal of sports medicine

authors： Compton RO,Ulcak M,Gonzales JU

更新日期：2015-11-01 00:00:00

abstract：:The purpose of this study was to determine whether preferred pedal rate (PPR) could be used as an index of cycling performance. Thirteen competitive cyclists cycled at PPR during a graded test and a supra-threshold constant power test (CPT). The results showed that PPR values reported in CPT were correlated to both pe...

journal_title：International journal of sports medicine

authors： Nesi X,Bosquet L,Pelayo P

更新日期：2005-06-01 00:00:00

abstract：:Cardiac vagal tone (CVT), a key determinant of resting heart rate (HR), is progressively withdrawn with incremental exercise and nearly abolished at maximal effort. While maximal HR decreases with age, there remains a large interindividual variability of results for any given age. In the present study, we hypothesized...

journal_title：International journal of sports medicine

authors： Duarte CV,Araujo CG

更新日期：2013-06-01 00:00:00

abstract：:The purpose of this investigation was to determine the accuracy of the critical velocity (CV) test for predicting time to exhaustion (time limit = TL) during treadmill running. Ten adult males (mean +/- SD of age = 23 +/- 2 years) volunteered to perform a maximal treadmill test, a CV test, and five exhaustive treadmil...

journal_title：International journal of sports medicine

authors： Pepper ML,Housh TJ,Johnson GO

更新日期：1992-02-01 00:00:00

abstract：:The ventilatory (anaerobic) threshold during short-term exercise has been defined as the O2 uptake (VO2) immediately below the VO2 at which pulmonary ventilation (VE) increases disproportionally relative to VO2 and the ventilatory threshold for long-term exercise as the VO2 immediately below the VO2 at which the VE co...

journal_title：International journal of sports medicine

authors： Reybrouck T,Ghesquiere J,Weymans M,Amery A

更新日期：1986-02-01 00:00:00

abstract：:The present paper reviews evidence for the role of specific amino acids in the etiology of fatigue and the overtraining syndrome in athletes. An increase in the plasma concentration ratio of free tryptophan: branched-chain amino acids may mediate an increase in 5-HT synthesis in the brain and thus induce fatigue durin...

journal_title：International journal of sports medicine

authors： Parry-Billings M,Blomstrand E,McAndrew N,Newsholme EA

更新日期：1990-05-01 00:00:00

abstract：:Length and weight for age (1-12 months) charts are presented for the longitudinal Euro-Growth Study. "Weight-for-length", another widely used growth chart, presents a problem from a methodological point of view. Target length values (53-77 cm) are not observed in all infants, leading to truncated age distributions at ...

journal_title：International journal of sports medicine

authors： van't Hof MA,Haschke F

更新日期：1997-07-01 00:00:00

abstract：:The current study aimed to determine the effects of sildenafil-associated aerobic exercise training (ET) on the physical performance, hemodynamic, autonomic and inflammatory parameters of rats. Male Wistar rats were randomly assigned to: sedentary rats placebo-treated (SP); sedentary rats sildenafil-treated (SS); trai...

journal_title：International journal of sports medicine

authors： Leoni LAB,Fukushima AR,Rocha LY,Feriani DJ,Júnior HJC,Gambassi BB,Mostarda CT,Maifrino LBM,Rodrigues B

更新日期：2018-10-01 00:00:00

abstract：:This study aimed to investigate how the trunk muscularity is related to sprint running performance. In 23 youth soccer players, the cross-sectional images at the mid level of each of L1-L2, L2-L3, L3-L4, L4-L5, and L5-S1 were obtained using magnetic resonance imaging to determine the cross-sectional areas (CSAs) of re...

journal_title：International journal of sports medicine

authors： Kubo T,Hoshikawa Y,Muramatsu M,Iida T,Komori S,Shibukawa K,Kanehisa H

更新日期：2011-03-01 00:00:00

abstract：:Little if any research has examined the variability in time to exhaustion (TTE) during submaximal treadmill running. This study investigated the test-retest reliability of submaximal treadmill TTE as a measure of endurance capacity. 16 endurance-trained males (n=14) and females (n=2) completed a run to exhaustion at 7...

journal_title：International journal of sports medicine

authors： Alghannam AF,Jedrzejewski D,Tweddle M,Gribble H,Bilzon JL,Betts JA

更新日期：2016-03-01 00:00:00

abstract：:Dietary intake, plasma lipids, lipoprotein and apolipoprotein levels, anthropometric measurements and anaerobic performance were studied in eleven judo athletes during a period of weight maintenance (T1) and after a 7d food restriction (T2). Dietary data were collected using a 7-day diet record. Nutrient analysis indi...

journal_title：International journal of sports medicine

authors： Filaire E,Maso F,Degoutte F,Jouanel P,Lac G

更新日期：2001-08-01 00:00:00

abstract：:There is a potential need for the official criterion of testosterone abuse in sport (the urinary concentration ratio of testosterone glucuronide/epitestosterone glucuronide, TG/EG > 6) to be backed-up by some complementary markers, more particularly in cases of physiologically high TG/EG and when there is suspicion of...

journal_title：International journal of sports medicine

authors： Dehennin L,Pérès G

更新日期：1996-07-01 00:00:00

abstract：:This study evaluated the effect of ischemic preconditioning (IPC) on resistance exercise performance in upper limbs. After 12-RM load determination, 21 men attended 4 trials separated by 3 days in a randomized crossover design: IPC (4×5-min occlusion 220 mmHg/reperfusion 0 mmHg) in arms and in thighs, and SHAM (equal ...

journal_title：International journal of sports medicine

authors： Marocolo M,Marocolo IC,da Mota GR,Simão R,Maior AS,Coriolano HJ

更新日期：2016-09-01 00:00:00

abstract：:As of 2017, the international football federation introduced the change of direction ability test (CODA) and the 5×30 m sprint test for assistant referees (ARs) and continued the 6×40 m sprint test for field referees (FRs) as mandatory tests. The aim of this study was to evaluate the association between performance in...

journal_title：International journal of sports medicine

authors： Riiser A,Andersen V,Castagna C,Pettersen SA,Saeterbakken A,Froyd C,Ylvisaker E,Naess Kjosnes T,Fusche Moe V

更新日期：2018-07-01 00:00:00

abstract：:The effects of muscle temperature on the development of muscular power are discussed. Temperature influences power (both metabolic and mechanical) by means of its effects on the rate of ATP hydrolysis and/or resynthesis. One would therefore expect reduced power outputs at cold muscle temperatures in humans. However, t...

journal_title：International journal of sports medicine

authors： Ferretti G

更新日期：1992-10-01 00:00:00