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Heart rate

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Articles 31 - 40 of 40

Full-Text Articles in Physiology

Comparative Analysis Of Cardiopulmonary Responses Of Healthy Sedentary Men And Men After Acute Myocardial Infarction, Vandeni C. Kunz, Karina B. Serra, Erica N. Borges, Ana Cristina S. Rebelo Mar 2012

Comparative Analysis Of Cardiopulmonary Responses Of Healthy Sedentary Men And Men After Acute Myocardial Infarction, Vandeni C. Kunz, Karina B. Serra, Erica N. Borges, Ana Cristina S. Rebelo

International Journal of Exercise Science: Conference Proceedings

The aim of this study was to assess the aerobic capacity of men after acute myocardial infarction (G-AMI) and of healthy sedentary men (G-C) at the anaerobic threshold (AT) and at the peak of the exercise (up to physical exhaustion) during a ramp-type ergospirometric test (R-ET). Methods: 22 volunteers divided into two groups: G-AMI (n=10), 55.6 ± 9.7 years old, undergoing β-blocking therapy (atenolol, dosage 46 ± 9.4 mg/day), Killip classification grade I, and G-C (n=12), 53.3 ± 3.2 years old. The G-C subjects took no type of medication. Experimental protocol: R-ET, with power increments of 10W/min for the G-AMI …

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Effect Of Cadence To Determine Critical Power Using Non- Exhaustive Protocol In Cycle Ergometer, Wellington De Sousa Assis, Gustavo Gomes De Araujo, Ivan Gustavo Masselli Dos Reis, Álvaro Luis Pessoa De Farias Mar 2012

Effect Of Cadence To Determine Critical Power Using Non- Exhaustive Protocol In Cycle Ergometer, Wellington De Sousa Assis, Gustavo Gomes De Araujo, Ivan Gustavo Masselli Dos Reis, Álvaro Luis Pessoa De Farias

International Journal of Exercise Science: Conference Proceedings

In cycling the exercise power (w) is a product of cadence (rpm) and kilopounds (kp). The purpose of this study was to check the pedaling frequency influence on critical power (CP) determined using non-exhaustive aerobic capacity test (Chassain, 1986). Adult men (n=2) were submitted to four powers (100, 120, 130 and 150 w) in two different cadences (40 and 70 rpm) in cycloergometer (Monark 894 E). Two exercise bouts lasting 180 seconds by 90 seconds of interval were performed at an equal intensity. For each intensity, delta heart rate (ΔHR) was determined by subtraction of the maximum heart rate (MHR) …

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Competitive Modeling Of Heart Rate In Brazilian Juniors Soccer Players, Tiago Volpi Braz, Leandro Mateus Pagoto Spigolon, João Paulo Borin Mar 2012

Competitive Modeling Of Heart Rate In Brazilian Juniors Soccer Players, Tiago Volpi Braz, Leandro Mateus Pagoto Spigolon, João Paulo Borin

International Journal of Exercise Science: Conference Proceedings

The heart rate (HR) has been used as indicator of competitive actions intensity in soccer players. The aim of this study was to analyze the competitive modeling of HR in eight brazilian juniors soccer players (18.84 ± 1.04 years; 71.19 ± 8.60Kg; 177.25 ± 6.04 cm) during a preparatory stage game. All were evaluated with Polar® heart rate monitor Team System model in five moments: warm-up (16min and 40s), recovery (8min and 15s), 1st half (48min), interval (7min and 45s), 2nd half (45min and 30s), and the heartbeats saved every 5 seconds. After collection, the data were kept in computational …

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Physiological Monitoring Of The Cardiovascular System During A One-Rep Max Bench Press Using The Zephyr Bioharness, Kelly A. Brooks, Kyle T. Craven Jan 2012

Physiological Monitoring Of The Cardiovascular System During A One-Rep Max Bench Press Using The Zephyr Bioharness, Kelly A. Brooks, Kyle T. Craven

International Journal of Exercise Science: Conference Proceedings

While much is known about the muscular and neurological responses in the body during a one rep max (1RM) bench press test, there is little research regarding the cardiovascular response. The purpose of this study was to investigate the physiological response, specifically in the cardiopulmonary system, during 1RM testing in real-time using the Zephyr Bioharness. Thirty college undergraduates who were enrolled in beginning weight training for three months were asked to wear a BioHarness device during a 1RM bench test. Individual 1RM was found one week prior to test. Prior to testing, subjects followed a standardized warm-up and protocol to …

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Parameters Of Walking And Jogging In Healthy Young Adults, Tiago V. Barreira†, David A. Rowe‡, Minsoo Kang‡ Jan 2010

Parameters Of Walking And Jogging In Healthy Young Adults, Tiago V. Barreira†, David A. Rowe‡, Minsoo Kang‡

International Journal of Exercise Science

Int J Exerc Sci 3(1): 4-13, 2010. The purposes of this study were to a) investigate the average heart rate (HR), speed, stride length, and stride rate during moderate intensity walking and jogging in healthy young adults, b) cross validate the walking stride length calculation based on 42% of height and c) provide reliability information for measurement of walking and jogging steps, speed, stride length, and stride rate. Participants (N=130) wore two Yamax SW-200 pedometers and a Polar A-1 HR monitor while performing walking and jogging trials. The correlation between estimated (0.71 ± 0.04 m·stride-1) and actual stride length (0.78 …

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Passive Limb Movement Augments Ventilatory Response To Co2 Via Sciatic Inputs In Anesthetized Rats, Jianguo Zhuang, Fadi Xu, Cancan Zhang, Donald T. Frazier Jun 2009

Passive Limb Movement Augments Ventilatory Response To Co2 Via Sciatic Inputs In Anesthetized Rats, Jianguo Zhuang, Fadi Xu, Cancan Zhang, Donald T. Frazier

Physiology Faculty Publications

Passive limb movement (PLM) in humans induces a phasic hyperpnea, but the underlying physiological mechanisms remain unclear. We asked whether PLM in anesthetized rats would produce a similar phasic hyperpnea associated with an augmented ventilatory (V̇E) response to CO2 that is dependent on sciatic afferents. The animals underwent 5 min threshold PLM, 3 min hypercapnia (5% CO2), and their combination (CO2 exposure at the end of 2nd min of 5-min PLM) before and after bilateral transection of the sciatic nerves. We found that a threshold PLM evoked a phasic hyperpnea, similar to …

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Timing Carbohydrate Beverage Intake During Prolonged Moderate Intensity Exercise Does Not Affect Cycling Performance, George G. Schweitzer†, John D. Smith‡, James D. Lecheminant‡ Jan 2009

Timing Carbohydrate Beverage Intake During Prolonged Moderate Intensity Exercise Does Not Affect Cycling Performance, George G. Schweitzer†, John D. Smith‡, James D. Lecheminant‡

International Journal of Exercise Science

Carbohydrate beverages consumed during long-term exercise have been shown to attenuate fatigue and improve performance; however, the optimal timing of ingestion is unclear. Therefore, the purpose of this study was to determine if timing the carbohydrate ingestion (front-loading (FL), continual loading (CL), and end-loading (EL)) during prolonged exercise influenced exercise performance in competitive cyclists. Ten well-trained cyclists completed three separate exercise bouts on a bicycle ergometer, each lasting 2 hours at an intensity of ~67% VO2 max, followed by a 15-minute “all out” time trial. In the FL trial, participants ingested a carbohydrate beverage during the first hour and …

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Age-Related Differences In Systolic Blood Pressure Recovery After A Maximal-Effort Exercise Test In Non-Athletic Adults, Uchechukwu Dimkpa†, Andrew C. Ugwu‡ Oct 2008

Age-Related Differences In Systolic Blood Pressure Recovery After A Maximal-Effort Exercise Test In Non-Athletic Adults, Uchechukwu Dimkpa†, Andrew C. Ugwu‡

International Journal of Exercise Science

The present study investigated the rate of systolic blood pressure recovery (SBPR) amongst three male age groups. Ninety-six apparently healthy, non-athletic adult males (48 young [23.91±4.58 years], 32 middle-aged [41.78±5.98 years] and 16 elderly [62.87±2.57 years]) participated in the study. Subjects performed a maximal-effort ergometer exercise test. Maximal oxygen uptake (VO2max) was measured during the exercise protocol; heart rate (HR) and SBP were measured before exercise (after 10 and 15 minutes of rest), during exercise (at 2-minute intervals), and at the first minute of post-exercise recovery and subsequently at 2-minute intervals until the recovery of SBP. Results showed that third-minute …

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The Effects Of Music On Heart Rate And Perceived Exertion During 20 Minutes Of Treadmill Running, Tara Litz Apr 2006

The Effects Of Music On Heart Rate And Perceived Exertion During 20 Minutes Of Treadmill Running, Tara Litz

Undergraduate Theses and Capstone Projects

This study examined the effects of music on heart rate (HR) as well as ratings of perceived exertion (RPE-B) while running on a treadmill for 20 minutes. Research subjects included men and women, ages 18 to 25. All subjects completed a 20-minute treadmill run set at 5.0 mph with 0% grade. Omron heart monitors were used to measure and record subjects’ HR every 2 minutes after the start of the test. Subjects reported ratings of perceived exertion -using the Borg Scale- which was also recorded every two minutes throughout the test period. One treadmill session included music; the other session …

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Student Physical Activity Patterns: Grade, Gender, And Activity Influences, Pamela Hodges Kulinna, Jeffrey J. Martin, Qin Lai, Amy Kliber, Brett Reed Jul 2003

Student Physical Activity Patterns: Grade, Gender, And Activity Influences, Pamela Hodges Kulinna, Jeffrey J. Martin, Qin Lai, Amy Kliber, Brett Reed

Kinesiology, Health and Sport Studies

The purpose of this study was to determine how physical education students' cardiovascular responses as determined by mean heart rate, standard deviation of heart rate, and percentage of time in target heart rate zone varied according to student characteristics. Participants were 505 students in Grades 3 through 12. The Polar Accurex Plus heart rate telemetry system was used to measure the physiological load on the cardiovascular system. Three-way ANOVA results suggested that heart rate patterns in physical education varied according to gender, grade, and activity. For example, secondary school girls were more active in individual activities while secondary school boys …

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