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Full-Text Articles in Medicine and Health Sciences
An Alternate To Accumulated Oxygen Deficit (Aod) For Measuring Anaerobic Contribution: ‘Aodalt’ Is Valid In Normoxia And Hypoxia, Austin Shaw, John Michael Mihalek, David W. Hill
An Alternate To Accumulated Oxygen Deficit (Aod) For Measuring Anaerobic Contribution: ‘Aodalt’ Is Valid In Normoxia And Hypoxia, Austin Shaw, John Michael Mihalek, David W. Hill
International Journal of Exercise Science: Conference Proceedings
Accumulated oxygen deficit (AOD) is the gold standard measure of anaerobic contribution; however, its calculation requires several contentious assumptions and it is time-consuming, requiring participants to perform a number of submaximal exercise bouts to establish exercise efficiency. A new method, AODalt, requires performance of only a single bout of exercise, and is based on the presumption that the fast phase of the post-exercise oxygen uptake (VO2) profile reflects the alactic or phosphocreatine (PCr) contribution and that the exercise-induced increase in blood lactate concentration is quantitatively related to the lactic or glycolytic contribution representing a measure of total anaerobic …
Bicycle Handlebar Width Does Not Affect Spirometry, Ventilation, Or Gas Exchange, Matthew J. Fahey, Daniel T. Cannon
Bicycle Handlebar Width Does Not Affect Spirometry, Ventilation, Or Gas Exchange, Matthew J. Fahey, Daniel T. Cannon
International Journal of Exercise Science: Conference Proceedings
Bicycle fit may affect comfort, aerodynamics, efficiency, ventilation, and power generation. Handlebars determine how the rider interacts with the bicycle. A wide range of handlebar widths are commercially available, but it is unclear if the resultant position affects lung function, ventilation, gas exchange, or efficiency. PURPOSE We aimed to measure the effects of handlebar widths on ventilation, gas exchange, spirometry, and comfort during moderate constant power exercise. METHODS Twenty-four recreationally active adults completed the study (32 ± 5 yrs., 175 ± 9 cm, 74 ± 12 kg, 8 women, 16 men). Participants completed three moderate constant power bouts of exercise …
Cycling Versus Treadmill Potentiation Effects Following High-Intensity Interval Training, Mark Martinez, Juliet Moore, Kathryn Havens, George Salem
Cycling Versus Treadmill Potentiation Effects Following High-Intensity Interval Training, Mark Martinez, Juliet Moore, Kathryn Havens, George Salem
International Journal of Exercise Science: Conference Proceedings
High-intensity interval training (HIIT) has emerged as a popular form of exercise, with intermittent bouts of higher and lower intensity cycles. Not well understood to date is the influence of HIIT exercise modality (e.g., cycling vs treadmill running) on measures of jump performance. A generally accepted metric for assessing performance and overall athleticism involves performing a countermovement jump (CMJ). Furthermore, heavy exercise has been shown to improve muscle performance using post-activation potentiation. Purpose: This study compared the effects of HIIT bouts of cycling vs treadmill running on CMJ concentric impulse, peak takeoff force, and jump height. Methods: Eleven young, …
Fluid Intake And Hydration Responses To Mass Participation Gravel Cycling, Brandon Raik, Francis Salmon, Grace Handler, Matthew M. Schubert
Fluid Intake And Hydration Responses To Mass Participation Gravel Cycling, Brandon Raik, Francis Salmon, Grace Handler, Matthew M. Schubert
International Journal of Exercise Science: Conference Proceedings
Gravel cycling is a relatively new cycling discipline, with the Union Cycliste Internationale (UCI) hosting their first UCI Gravel World Championships in 2022. Gravel races combine features of road racing, cyclocross, and mountain biking, including various terrain of varying technical difficulty (paved roads, dirt roads, fire roads, single- and double-track trails), long distances, substantial vertical elevation gain, obstacles, and limited opportunities to stop for in-race nutrition. PURPOSE: To date, gravel racing has not been scientifically examined to determine the demands of the sport. Data from cycling road races indicate substantial fluid loss, which may impair exercise performance. This study assessed …
Continuous Leg Cycling Ergometry Prescribed At Identical Relative Power Output Elicits Different Physiological Responses Versus Arm Cycle Ergometry, Tanner M. Robson, David W. Mcmillan, Todd A. Astorino Facsm
Continuous Leg Cycling Ergometry Prescribed At Identical Relative Power Output Elicits Different Physiological Responses Versus Arm Cycle Ergometry, Tanner M. Robson, David W. Mcmillan, Todd A. Astorino Facsm
International Journal of Exercise Science: Conference Proceedings
PURPOSE: The aim of this study was to compare physiological and perceptual responses to progressive moderate intensity continuous exercise (MICE) between leg (LCE) and arm cycle ergometry (ACE). METHODS: Seventeen active men and women (age and percent body fat = 26 ± 7 yr and 18 ± 3 %) initially performed graded exercise on each modality to assess maximal oxygen uptake (VO2max) and peak power output (PPO). Using a randomized crossover design, they subsequently performed 45 min of MICE consisting of three 15 min bouts at 20, 40, and 60 % PPO on each modality. Gas exchange data (VO2, VCO2, …
Performance Gap Between Men And Women In Ironman Triathlons, Sara D. Glaser, Caio V. Sousa Dr.
Performance Gap Between Men And Women In Ironman Triathlons, Sara D. Glaser, Caio V. Sousa Dr.
International Journal of Exercise Science: Conference Proceedings
PURPOSE: The increased participation and performance improvement of women in Ironman triathlons (IM) have been showing that the performance gap with men is shorter than ever. Thus, this study aimed to explore this performance gap by discipline (swimming, cycling, and running) and age-groups. METHODS: Publicly available data from all IM events from 2002 to 2022 were used for this analysis. Each performance variable (swimming, cycling, running, and overall) were included as dependent variables in general linear model with gender and category (elite, age-groups) as independent factors. The effect size (Cohen’s d and delta percentage) was calculated for every “male vs. …
Evaluation And Validity Of A Predictive Equation For Measuring Core Temperature During Exercise In Heat Stress, Robert J. Castro, Alexander J. Gonsalves, Edgar B. Doolan, Jochen Kressler
Evaluation And Validity Of A Predictive Equation For Measuring Core Temperature During Exercise In Heat Stress, Robert J. Castro, Alexander J. Gonsalves, Edgar B. Doolan, Jochen Kressler
International Journal of Exercise Science: Conference Proceedings
Exercising in the heat is very common yet can pose significant health risks such as heat exhaustion and heat stroke when core temperature exceeds 38°C and 40°C, respectively. However, current methods of core temperature measurement are invasive and impractical. Recent research indicates that core temperature can be predicted with two non-invasive inputs, heart rate (HR) and skin temperature. PURPOSE: The objective of this study was to assess the validity and reliability of this predictive equation against the direct measurement of core temperature. METHODS: Participants (n = 11) cycled in an environmental chamber (40°C, 40% humidity) at 75% …
Exergame Versus Traditional Cycling: A Comparison Of Psychological Factors, Mckay Bloxham, Casi Helbig
Exergame Versus Traditional Cycling: A Comparison Of Psychological Factors, Mckay Bloxham, Casi Helbig
International Journal of Exercise Science: Conference Proceedings
Previous research has noted that increased enjoyment levels endorsed the involvement in long-term exercise persistence. PURPOSE: The purpose of the study was to compare enjoyment levels and perceived time of the Spinner NXT, a stationary bike commonly found in cycling classes, and the TACX trainer, a stationary bike which allows users to immerse themselves in any location in the world and participate in competitions if desired. METHODS: Sample size consisted of 30 Texas Lutheran University students. Each participant was assigned a number to protect their identity and was randomly assigned which bicycle they would start with. Participant was …
Electromyographic Analysis Of The Vastus Lateralis And Vastus Medialis Muscles Among Different Crank Lengths In Cycling, Jackson C. Crovella, Karoline M. Wucherer, Joy He, Christiane R. O'Hara
Electromyographic Analysis Of The Vastus Lateralis And Vastus Medialis Muscles Among Different Crank Lengths In Cycling, Jackson C. Crovella, Karoline M. Wucherer, Joy He, Christiane R. O'Hara
International Journal of Exercise Science: Conference Proceedings
Crank length (CL) on a bicycle may influence the total activation and period of activation of the leg muscles. Differences in total muscular activation suggest that CL may alter muscular fatigue. Differences in muscular onset and offset suggest that CL may shift muscle activation periods across a 360 degree crank cycle. PURPOSE: To examine the effects of four different CL (155, 165, 175, and 185 mm) on muscular activation of vastus lateralis (VL) and vastus medialis (VM). METHODS: Nine non-cyclists (6M, 3F, aged 18-55) participated in a single blind randomized cross-over experiment with four CL. Delsys EMG sensors …
Assessing The Validity Of Several Heart Rate Monitors In Wearable Technology While Mountain Biking, Bryson Carrier, R. W. Salatto, Dustin W. Davis, Jacquelyn V.L. Sertic, Brenna Barrios, Peyton Cater, James W. Navalta
Assessing The Validity Of Several Heart Rate Monitors In Wearable Technology While Mountain Biking, Bryson Carrier, R. W. Salatto, Dustin W. Davis, Jacquelyn V.L. Sertic, Brenna Barrios, Peyton Cater, James W. Navalta
International Journal of Exercise Science: Conference Proceedings
The development of fitness trackers and other wearable technology designed for health and fitness purposes is growing in popularity and sophistication every day. These devices have the ability to measure or estimate a variety of physiological and physical variables, such as step count, energy expenditure, VO2max, lactate threshold, heart rate, stride length, vertical oscillation, ground contact time, blood oxygen saturation (via pulse oximetry), and many others. PURPOSE: In order to properly use these devices, independent validation needs to take place to determine the device’s accuracy and ability to properly measure or estimate each variable. Therefore, the purpose of this …
A Comparison Of The Effects Of Moderate-Intensity Continuous Cycling And High-Intensity Interval Cycling On Postprandial Lipemia And Glycemia, Autumn Oliver, David J. Buckley, James R. Rowe Jr
A Comparison Of The Effects Of Moderate-Intensity Continuous Cycling And High-Intensity Interval Cycling On Postprandial Lipemia And Glycemia, Autumn Oliver, David J. Buckley, James R. Rowe Jr
International Journal of Exercise Science: Conference Proceedings
Both moderate-intensity continuous exercise (MICE) and high-intensity interval exercise (HIIE) has been reported to reduce the magnitude of postprandial lipemia and glycemia. It is unclear if performing MICE or HIIE of similar duration and work would have a comparable effect on postprandial lipemia or glycemia. PURPOSE: Examine the postprandial lipemic and glycemic response following the completion of high-intensity interval cycling (HIIC) and moderate-intensity continuous cycling (MICC) that is of equal duration and comparable work output. METHODS: Participants were mildly active males (n = 12; age = 21.9 ± 1.8 yrs; body mass = 90.1 ± 16.8 kg; BF% = …
No Changes In Appetite Stimulating Hormones Following Swimming And Cycling Exercise Interventions, Brandon G. Fico, Mohammed Alkatan, Yuzi Zhang, Hirofumi Tanaka
No Changes In Appetite Stimulating Hormones Following Swimming And Cycling Exercise Interventions, Brandon G. Fico, Mohammed Alkatan, Yuzi Zhang, Hirofumi Tanaka
International Journal of Exercise Science: Conference Proceedings
Swimming is a favorable and ideal modality of exercise for individuals with obesity and arthritis as it encompasses a minimal weight-bearing stress and a reduced heat load. However, the available evidence indicates that regular swimming may not be effective in reducing body weight and body fatness. A current hypothesis is that exercise in cold water somehow stimulates appetite. PURPOSE: We determined the effect of swimming exercise training on fasting concentrations of ghrelin, insulin, leptin, and peptide YY in obese individuals with osteoarthritis. Cycling training was included as a non-weight bearing land-based comparison group. METHODS: Thirty-nine obese participants with …
Can A Dynamic Warm-Up Reduce The Magnitude Of Immune Perturbation Following Vigorous Aerobic Exercise, Mahmoud T. Elzayat, Emily C. Lavoy
Can A Dynamic Warm-Up Reduce The Magnitude Of Immune Perturbation Following Vigorous Aerobic Exercise, Mahmoud T. Elzayat, Emily C. Lavoy
International Journal of Exercise Science: Conference Proceedings
Exercise transiently increases several leukocyte populations in peripheral blood in an intensity-dependent manner, with numbers returning to baseline or lower during recovery. This mobilization of immune cells is explained in part by sympathetic activity and the release of stress hormones (catecholamines and cortisol). The literature examining immune responses to exercise has by and large failed to control for the presence of a warm-up prior to the experimental bout. Gradually increasing exercise intensity over a period of minutes may reduce the stress of the exercise bout and thus may influence the immune response to a given exercise protocol. PURPOSE: To …
Accuracy Of Fitbit Surge And Smartphone Apps At Measuring Cycling Distance And Speed, Jose L. Gamez Jr., Ivan A. Figueroa, Merrill D. Funk
Accuracy Of Fitbit Surge And Smartphone Apps At Measuring Cycling Distance And Speed, Jose L. Gamez Jr., Ivan A. Figueroa, Merrill D. Funk
International Journal of Exercise Science: Conference Proceedings
There are many smartphone apps that measure distance and speed of cycling, however, there is no research on the accuracy of this cycling apps. PURPOSE: To determine the accuracy of Fitbit Surge and two smartphone applications at measuring distance and speed while cycling outside. METHODS: Thirteen college-aged students (Mean±SD; BMI: 25.2±3.0kg/m2; 10 males, 3 females) consented to participate in one measurement session. A 0.75 mile route along a sidewalk around the university campus was used for 3 separate trials using a mountain bike. A Fitbit (FB) along with an Android smartphone running Google-Fit (G-Fit) and S-Health (SH) were …