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Full-Text Articles in Physiology
Cardiovascular And Muscular Response To No Load Exercise With Blood Flow Restriction, Wenyuan Zhu, Noam Yitzchaki, Tayla E. Kuehne, Ryo Kataoka, Kevin Mattocks, Samuel L. Buckner
Cardiovascular And Muscular Response To No Load Exercise With Blood Flow Restriction, Wenyuan Zhu, Noam Yitzchaki, Tayla E. Kuehne, Ryo Kataoka, Kevin Mattocks, Samuel L. Buckner
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 1807-1818, 2020. Changes in muscle thickness (MT), isometric torque, and arterial occlusion pressure (AOP) were examined following four sets of twenty unilateral elbow flexion exercise. Participants performed four sets of maximal voluntary contractions with no external load throughout a full range of motion of a bicep curl with and without the application of blood flow restriction (BFR). For torque there was an interaction (p = 0.012). The BFR condition had lower torque following exercise (56.07 ± 17.78 Nm) compared to the control condition (58.67 ± 19.06 Nm). For MT, there was a main …
Use Of Heart Rate Index To Predict Oxygen Uptake – A Validation Study, Jie Kang, Nicholas A. Ratamess, Avery D. Faigenbaum, Jill A. Bush-Wallace, Christopher Roser, Devyn Montemarano, Hannah Mercado, Morgan Choma, Christian Mendez, Matthew Pollock
Use Of Heart Rate Index To Predict Oxygen Uptake – A Validation Study, Jie Kang, Nicholas A. Ratamess, Avery D. Faigenbaum, Jill A. Bush-Wallace, Christopher Roser, Devyn Montemarano, Hannah Mercado, Morgan Choma, Christian Mendez, Matthew Pollock
International Journal of Exercise Science
International Journal of Exercise Science 13(7): 1705-1717, 2020. An equation that uses heart rate index (HRI) defined as HR/HRrest to predict oxygen uptake (VO2) in METs (e.g., METs = 6 × HRI ‒ 5) has been developed retrospectively from aggregate data of 60 published studies. However, the prediction error of this model as used by an individual has not been established. Therefore, the purpose of this study was to examine the predictive validity of the HRI equation by comparing submaximal and maximal VO2 predicted by the equation (VO2-Pred) with that measured by indirect calorimetry (VO …
Physiological Responses To Counterweighted Single-Leg Cycling In Older Males, Phil Lascola, C. Eric Heidorn, Brandon Pollock, Keith Burns, John Mcdaniel
Physiological Responses To Counterweighted Single-Leg Cycling In Older Males, Phil Lascola, C. Eric Heidorn, Brandon Pollock, Keith Burns, John Mcdaniel
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 1487-1500, 2020. Single-leg cycling (SLC) allows for a greater muscle specific exercise capacity and therefore provides a greater stimulus for metabolic and vascular adaptations compared to double-leg cycling (DLC). The purpose of this investigation was to compare the cardiovascular, peripheral, and metabolic responses of counterweighted (10kg) SLC to DLC in a healthy older male population. Eleven males (56-86 years) performed two cycling modalities consisting of DLC and SLC. For each modality, participants performed 4-minute cycling trials (60rpm) at three work rates (25, 50, 75W). Repeated measures ANOVAs and paired samples T-test (α=0.05) were used …
Esport: Fortnite Acutely Increases Heart Rate Of Young Men, Silvio Valladao, Jake Middleton, Thomas Andre
Esport: Fortnite Acutely Increases Heart Rate Of Young Men, Silvio Valladao, Jake Middleton, Thomas Andre
International Journal of Exercise Science
International Journal of Exercise Science 13(6): 1217-1227, 2020. Esports has rapidly increased in online play and viewing. A myriad of literature focuses on heart rate (HR) during traditional athletic competition, little research has addressed the HR responses of individuals playing esports and none in the esport: Fortnite. The purpose of this study was to compare the HR response during a 3-hour seated session of the esport: Fortnite to resting HR. Male college students (n = 23; age = 21 ± 1.8 years; BMI = 25.7 ± 3.9; Esport mean hours per week = 13 ± 8.7) were recruited to …
Physiological And Biomechanical Differences Between Seated And Standing Uphill Cycling, Quint N. Berkemeier, Brent W. Alumbaugh, Trevor Gillum, Jared Coburn, Jong-Kyung Kim, Michael Reeder, Chelsie A. Fechtner, Gerald A. Smith
Physiological And Biomechanical Differences Between Seated And Standing Uphill Cycling, Quint N. Berkemeier, Brent W. Alumbaugh, Trevor Gillum, Jared Coburn, Jong-Kyung Kim, Michael Reeder, Chelsie A. Fechtner, Gerald A. Smith
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 996-1011, 2020. Despite differences in economy, cyclists climb in seated and standing positions. Prompted by gaps in research, we compared VO2 and heart rate (HR) (Study 1), muscle activation (Study 2) and breathing and pedaling entrainment (Study 3). METHODS: Subjects rode their bicycles on a treadmill in seated and standing positions. In Study 1, VO2 and HR of four male cyclists (21.3 ± 1.7 yrs; 69.1 ± 6 ml/kg/min) were collected, alternating positions every 5 minutes for 20 minutes (8 mph, 8% grade). In Study 2, muscle activations of eight male cyclists …
Evaluation Of Repetitive Jumping Intensity On The Digi-Jump Machine, T. Scott Lyons, James W. Navalta, Whitley J. Stone, Scott W. Arnett, Mark A. Schafer, Laura Igaune
Evaluation Of Repetitive Jumping Intensity On The Digi-Jump Machine, T. Scott Lyons, James W. Navalta, Whitley J. Stone, Scott W. Arnett, Mark A. Schafer, Laura Igaune
International Journal of Exercise Science
Cardiorespiratory endurance is an important element of aerobic fitness, particularly in weight management and reducing risk for cardiovascular disease. While there are numerous options for aerobic exercise, rope jumping is often overlooked. In addition to regular exercise and a healthy diet, the American Heart Association strongly recommends rope jumping. The first purpose of this study was to determine the steady state metabolic cost of repetitive jumping on the Digi-Jump machine to evaluate whether exercise on this device is more or less strenuous than similar exercise with a jump rope, as demonstrated in previous literature. A second purpose was to determine …
The Effects Of Machine-Weight And Free-Weight Resistance Exercise On Hemodynamics And Vascular Function, Erica M. Marshall, Jason C. Parks, Yu Lun Tai, J. Derek Kingsley
The Effects Of Machine-Weight And Free-Weight Resistance Exercise On Hemodynamics And Vascular Function, Erica M. Marshall, Jason C. Parks, Yu Lun Tai, J. Derek Kingsley
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 526-538, 2020. The purpose of this study was to examine hemodynamic and vascular responses between machine-weight and free-weight exercise. Resistance-trained individuals were assigned to a machine-weight (n= 13) or free-weight (n= 15) group. Groups completed two visits consisting of their assigned exercise condition and a control (CON). A 2 x 2 x 3 repeated measures ANOVA was used to test the effects of group across condition and time on the hemodynamic parameters [cardiac output (CO), heart rate (HR), total peripheral resistance (TPR), mean arterial pressure (MAP), and stroke volume (SV)]. …
Characterization Of Adult Heart Rate Responses During Recreational Skateboarding At Community Skateparks, Tyler Wiles, Daniel Kellogg, Heather Furr, Jeff A. Nessler, Sean C. Newcomer
Characterization Of Adult Heart Rate Responses During Recreational Skateboarding At Community Skateparks, Tyler Wiles, Daniel Kellogg, Heather Furr, Jeff A. Nessler, Sean C. Newcomer
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 501-510, 2020. Youth participating in recreational skating at community skate parks attain exercise intensities and durations that are comparable with the CDC’s exercise recommendations for cardiovascular fitness for their age group. However, it is currently unclear if adults who skateboard in the same environment also achieve the recommended intensities and durations for cardiovascular fitness. Therefore, the purpose of this study was to test the hypothesis that skateboarding would elicit heart rates and durations consistent with the CDC’s recommendations for cardiovascular fitness in adults. Fifty-five subjects between ages 18-55 were recruited from six community skateparks …
Large Inter-Individual Differences In Responses To A Block Of High Intensity Aerobic Interval Training: A Case Series In National-Level Cyclists And Triathletes, Solfrid Bratland-Sanda, Frank G. Pedersen, Marius N. Haave, Jan Helgerud, Øyvind Støren
Large Inter-Individual Differences In Responses To A Block Of High Intensity Aerobic Interval Training: A Case Series In National-Level Cyclists And Triathletes, Solfrid Bratland-Sanda, Frank G. Pedersen, Marius N. Haave, Jan Helgerud, Øyvind Støren
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 480-487, 2020. The aim was to investigate individual responses on VO2maxand performance to a block of high intensity aerobic interval training (HIIT) in national-level endurance athletes. METHODS: National-level cyclists and triathletes (five men and two women, 31 ± 3.3 years, VO2max65.1 ± 3.3 ml·kg-1·min-1) conducted 14 HIIT sessions (4x4 min uphill running at 90-95% maximal heart rate) in nine days during preseason. VO2maxin running and cycling, lactate threshold (LT) in cycling, oxygen cost of cycling (CC), and a cycling time-trial (TT) were …
Comparison Of Acute Cardiometabolic Responses In A 7-Minute Body Weight Circuit To 7-Minute Hiit Training Protocol, Cruz Armas, Robert J. Kowalsky, Christopher M. Hearon
Comparison Of Acute Cardiometabolic Responses In A 7-Minute Body Weight Circuit To 7-Minute Hiit Training Protocol, Cruz Armas, Robert J. Kowalsky, Christopher M. Hearon
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 395-409, 2020. To investigate the acute cardiometabolic responses of a 7-minute bodyweight resistance exercise circuit (HICE) compared to a 7-minute high intensity interval training cycle protocol (HIIE). Methods: Twelve apparently healthy and active young adults were enrolled in a randomized crossover study (HICE vsHIIE). The 12 HICE exercises used a 30:5 second exercise to rest ratio, followed by a 3-minute cool-down and was replicated in the HIIE cycle protocol. Following each protocol, subjects were seated for the next hour. Measurements included blood pressure (BP) heart rate, blood glucose and triglycerides, taken prior to …
Limb Occlusion Pressure: A Method To Assess Changes In Systolic Blood Pressure, Zachary W. Bell, Matthew B. Jessee, Kevin T. Mattocks, Samuel L. Buckner, Scott J. Dankel, J Grant Mouser, Takashi Abe, Jeremy P. Loenneke
Limb Occlusion Pressure: A Method To Assess Changes In Systolic Blood Pressure, Zachary W. Bell, Matthew B. Jessee, Kevin T. Mattocks, Samuel L. Buckner, Scott J. Dankel, J Grant Mouser, Takashi Abe, Jeremy P. Loenneke
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 366-373, 2020. Although often used as a surrogate, comparisons between traditional blood pressure measurements and limb occlusion assessed via hand-held Doppler have yet to be completed. Using limb occlusion pressure as a method of assessing systolic pressure is of interest to those studying the acute effects of blood flow restriction, where the removal of the cuff may alter the physiological response. Purpose: We sought to determine how changes in limb occlusion pressure track with changes in traditional assessments of blood pressure. Basic Procedures: Limb occlusion pressure measured by hand-held Doppler and blood pressure measured …
Post Exercise Hypotension Following Concurrent Exercise: Does Order Of Exercise Modality Matter?, Whitley J. Stone, Mark A. Schafer, Scott W. Arnett, Scott Lyons
Post Exercise Hypotension Following Concurrent Exercise: Does Order Of Exercise Modality Matter?, Whitley J. Stone, Mark A. Schafer, Scott W. Arnett, Scott Lyons
International Journal of Exercise Science
International Journal of Exercise Science 13(2): 36-48, 2020. Cardiovascular (CV) and resistance training (RT) can moderate negative effects of aging, disease, and inactivity. Post-exercise hypotension (PEH) has been used as a non-pharmacological means to control and reduce BP. Few have evaluated PEH response following a bout of exercise combining CV and RT, whether or not there is an order effect, or if PEH continues when activities of daily living (ADLs) are resumed. Participants (N= 10) completed a non-exercise control, a graded exercise test (GXT), and two concurrent sessions (CVRT and RTCV). Each session was followed by a 60-minute …