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International Journal of Exercise Science

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https://www.readbyqxmd.com/read/27766136/effect-of-an-acute-bout-of-kettlebell-exercise-on-glucose-tolerance-in-sedentary-men-a-preliminary-study
#1
Samantha Greenwald, Edward Seger, David Nichols, Andrew D Ray, Todd C Rideout, Luc E Gosselin
Impaired glucose tolerance can have significant health consequences. The purposes of this preliminary study were to examine whether a single session of kettlebell exercise improves acute post-exercise glucose tolerance in sedentary individuals, and whether it was as effective as high-intensity interval running. Six sedentary male subjects underwent a two-hour oral glucose tolerance test following three different conditions: 1) control (no exercise); 2) kettlebell exercise (2 sets of 7 exercises, 15 repetitions per exercise with 30 seconds rest between each exercise); or 3) high-intensity interval running (10 one-minute intervals at a workload corresponding to 90% VO2max interspersed with one-minute active recovery periods)...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766135/sex-differences-in-time-perception-during-self-paced-running
#2
Nicholas J Hanson, Janet Buckworth
Time perception during exercise may be affected by chosen intensity, and may also affect enjoyment of exercise and subsequent long-term adherence. However, little is known about how individuals perceive the passage of time during exercise, or if factors such as sex are influential. The purpose of this study was to determine if there are sex related differences in perception of time during a bout of exercise in experienced runners. Twenty-two recreational runners (11 men, 11 women) participated in a bout of treadmill running where they were allowed to select their intensity...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766134/carotid-artery-imt-blood-pressure-and-cardiovascular-risk-factors-in-males-and-females
#3
Christina M Cromwell, Kristin R Aichele, Joyann E Oakman, Michael P Neal, Jessica M Lenzo, Avery N Perez, Naomi L Bye, Erica L Santaniello, Jessica A Hill, Rachel C Evans, Karla A Thiele, Lauren N Chavis, Allyson K Getty, Tia R Wisdo, Deborah L Feairheller
Previous studies have investigated carotid artery intima-media thickness (IMT) and blood pressure and found a direct correlation between the two. It is known that adult females have better cardiovascular health than males until a certain stage of life, yet limited research has examined gender differences in vascular function. Thus, the purpose of this study was to investigate vascular structure and function, blood pressure, and blood glucose/cholesterol levels in relation to gender differences in young healthy adults...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766133/the-effect-of-a-moderately-low-and-high-carbohydrate-intake-on-crossfit-performance
#4
Kurt A Escobar, Jacobo Morales, Trisha A Vandusseldorp
CrossFit is a metabolically demanding strength and conditioning method which performance may benefit from a carbohydrate (CHO)-rich diet. This study investigated the effect of three consecutive days of high CHO intake on CrossFit performance and corresponding metabolically -related variables in strength trained individuals. Eighteen subjects with a CHO intake of <6 g/kg/day were randomly assigned into a CHO (n = 9) or control (C) group (n =9) and underwent a 9-day training protocol. During days 1, 5, and 9, performance was measured as repetitions completed during a 12 minute CrossFit workout...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766132/physical-fitness-and-self-image-an-evaluation-of-the-exercise-self-schema-questionnaire-using-direct-measures-of-physical-fitness
#5
Jafra D Thomas, J Mark Vanness, Bradley J Cardinal
The purpose of this study was to perform a construct validity assessment of Kendzierski's exercise self-schema theory questionnaire using objective measures of health-related physical fitness. This study tested the hypothesis that individuals with an exercise self-schema would possess significantly greater physical fitness than those who did not across three domains of health-related physical fitness: Body composition, cardiovascular fitness, and upper-body muscular endurance. Undergraduate student participants from one private university on the west coast of the United States completed informed consent forms and the exercise self-schema questionnaire within a classroom setting or at an on-campus outside tabling session...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766131/eight-weeks-of-kettlebell-swing-training-does-not-improve-sprint-performance-in-recreationally-active-females
#6
Michael E Holmstrup, Brock T Jensen, William S Evans, Emily C Marshall
The kettlebell swing (KBS), emphasizing cyclical, explosive hip extension in the horizontal plane, aligns with movement- and velocity-specificity of sprinting. The present study examined the effect of an eight-week KBS intervention on sprinting in recreationally-active females, in comparison to an eight-week intervention using the stiff-legged deadlift (SDL). Following a pre-testing session measuring 30 meter sprint and countermovement vertical jump performance, participants were divided evenly by sprint time into KBS (n=8) and SDL (n=10) cohorts...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766130/inter-investigator-reliability-of-anthropometric-prediction-of-1rm-bench-press-in-college-football-players
#7
Richard M Schumacher, Jana L Arabas, Jerry L Mayhew, William F Brechue
The purpose of this study was to determine the effect of inter-investigator differences in anthropometric assessments on the prediction of one-repetition maximum (1RM) bench press in college football players. Division-II players (n = 34, age = 20.4 ± 1.2 y, 182.3 ± 6.6 cm, 99.1 ± 18.4 kg) were measured for selected anthropometric variables and 1RM bench press at the conclusion of a heavy resistance training program. Triceps, subscapular, and abdominal skinfolds were measured in triplicate by three investigators and used to estimate %fat...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766129/adolescents-perception-of-the-psychosocial-factors-affecting-sustained-engagement-in-sports-and-physical-activity
#8
James Gavin, Madeleine McBrearty, Kit Malo, Michael Abravanel, Tatiana Moudrakovski
The purpose of this study was to explore adolescents' perceptions of psychosocial influences - personal characteristics, environmental factors and behavioural undertakings - influencing their prolonged involvement in sports and physical activity (PA). A qualitative approach was adopted wherein 16 adolescents (8 boys, 8 girls; mean age 15.9 years), who had been physically active for at least the last 8 years, and sixteen adults identified as their 'parents' or 'guardians' participated in semi-structured interviews...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766128/the-effect-of-skinfold-on-the-assessment-of-the-mean-power-frequency-at-the-fatigue-threshold
#9
Alyssandra N Baniqued, Jorge M Zuniga, Thomas C Strunc, Katie M Keenan, Agrini K Boken, Jeffrey J Anderson
The purpose of this study was to determine if the amount of subcutaneous tissue over the quadriceps affects the assessment of mean power frequency at the fatigue threshold (MPFFT). It was hypothesized that greater skinfold values will result in lower power outputs associated to the MPFFT. Fourteen adults (Mean ± SD age = 20.7 ± 0.99; body weight = 72.8 ± 12.6 kg) performed an incremental cycle ergometry test to exhaustion while surface electromyographic (EMG) signals were measured from the vastus lateralis...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766127/effects-of-static-stretching-on-squat-performance-in-division-i-female-athletes
#10
Clare F Heisey, J Derek Kingsley
Static stretching was once recognized as a method of preparation for physical activity that would inhibit performance and increase risk of injury. However, a growing body of research suggests that static stretching may not have an inhibitory effect. Regardless, the data have not examined gender differences or the fatigue index (FI) and flexibility effects of static stretching on the back squat over multiple sets. Therefore, the purpose of this study was to examine the relationship between a static-stretch condition (SC) and control condition (CC) on flexibility and the FI of Division I female athletes during 4 sets of the back squat...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27766126/do-girls-with-excess-adiposity-perform-poorer-motor-skills-than-leaner-peers
#11
Daniel DAS Virgens Chagas, Joyce Ferreira Carvalho, Luiz Alberto Batista
The main aim of this study was to analyze the joint association of body fat percentage and physical activity levels on motor coordination scores in girls with different adiposity status. Sixty-eight school-aged children between 12 and 14 years participated in the study. Skinfold thickness was measured and the Körperkoordinationstest für Kinder test was administered. Participants completed a self-reporting questionnaire on physical activity. Children's adiposity status was attributed in according to age-specific cutoff points of a Brazilian database...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293510/the-effects-of-a-lifetime-physical-fitness-lpf-course-on-college-students-health-behaviors
#12
Alessandro Quartiroli, Hotaka Maeda
The purpose of this study was to examine motivational constructs and the effect of physical activity engagement on health behaviors in college students who were required to take a 15-week lifetime physical fitness (LPF) course for graduation. A total of fifty-eight first and second year college students aged between 17 and 23 years (M=18.72; SD=1.09). Paper and pencil questionnaires were anonymously administered at the beginning and at the end of the 15-week long spring 2012 semester. Analysis of the differences between the beginning and the end of the semester was completed...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293509/the-effect-of-single-leg-stance-on-dancer-and-control-group-static-balance
#13
Elisabeth A Kilroy, Olivia M Crabtree, Brittany Crosby, Amanda Parker, William R Barfield
The purpose of this study was to compare kinetic differences of static balance between female dancers (D) with at least seven years of dance experience and female non-dancers (ND) who were typical college students. Participants were tested in single-leg stance. Both the dominant leg (DL) and non-dominant leg (NDL) were tested with the participants shod (S) and barefoot (BF). Kinetic variables (vertical, medio-lateral [ML], antero-posterior [AP] maximum ground reaction forces (GRF), and center of pressure (COP) ML and AP) were measured by a Bertec force platform at 1000 Hz with participants S and BF...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293508/utilization-of-an-anti-gravity-treadmill-in-a-physical-activity-program-with-female-breast-cancer-survivors-a-pilot-study
#14
Ciaran M Fairman, Kristina L Kendall, Brandonn S Harris, Kenneth J Crandall, Jim McMillan
Breast Cancer survivors can experience a myriad of physical and psychological benefits as a result of regular exercise. This study aimed to build on previous research using lower impact exercise programs by using an antigravity (Alter-G(®)) treadmill to administer cardiovascular training. The purpose of this study was to determine the effectiveness a physical activity program, including an Alter-G(®) treadmill, for improving physiological and psychosocial measures in female breast cancer survivors. A 14-week intervention using an AB-AB study design was employed...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293507/oxygen-consumption-and-substrate-utilization-during-and-after-resistance-exercises-performed-with-different-muscle-mass
#15
Paulo Farinatti, Antonio G Castinheiras Neto, Paulo R S Amorim
This study investigated the energy expenditure (EE) and substrate utilization reflected by the respiratory-exchange ratio (RER) during and after resistance exercises performed with different muscle mass. Ten male volunteers (mean±SD; 26±4yr, 179±6cm, 77±8kg) performed multiple sets of the horizontal leg press (LP) and chest fly (CF) (5 sets of 10 repetitions with 15 repetition-maximum, 1-minute between-set intervals) in a counterbalanced design. Oxygen uptake and carbon dioxide production were measured during 40 minutes of resting; resistance exercise protocols (sets and intervals); 90 minutes of post-exercise recovery...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293506/validation-of-self-reported-anthropometrics-in-female-college-freshmen
#16
Ryan J Leone, Amy L Morgan, Mary-Jon Ludy
Most investigations concerning the validity of self-reported anthropometrics focus on weight, height, and body mass index. This study extends those investigations by exploring the impact of self-reporting bias on the disease risk indicators of waist circumference and body fat percentage. Female college freshmen (n=128) self-reported weight and height, then underwent measurements for weight, height, waist circumference, and body fat percentage. Self-reporting bias was defined as self-reported minus directly-assessed anthropometric value...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293505/leukocyte-subset-changes-in-response-to-a-164-km-road-cycle-ride-in-a-hot-environment
#17
Hui-Ying Luk, Amy L McKenzie, Anthony A Duplanty, Ronald G Budnar, Danielle Levitt, Alex Fernandez, Elaine C Lee, Lawrence E Armstrong, Jakob L Vingren
The purpose of this observational study was to determine the circulating leukocyte subset response to completing the 2013 Hotter'N Hell Hundred recreational 164-km road cycle event in a hot and humid environmental condition. Twenty-eight men and four women were included in this study. Whole blood samples were obtained 1-2 hours before (PRE) and immediately after (POST) the event. Electronic sizing/sorting and cytometry were used to determine complete blood counts (CBC) including neutrophil, monocyte, and lymphocyte subsets...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27293504/an-analysis-of-the-medical-costs-of-obesity-for-fifth-graders-in-california-and-texas
#18
Danielle E Levitt, Allen W Jackson, James R Morrow
The prevalence of childhood obesity in the United States increased more than three-fold from 1976 - 1980 to 2007 - 2008. The Presidential Youth Fitness Program's FitnessGram® is the current method recommended by the President's Council on Fitness, Sports & Nutrition for assessing health-related fitness factors, including body composition. FitnessGram® data from California and Texas, the two most populous states, over a three-year time span indicate that more than one-third of fifth grade students, typically ten-year-olds, are obese...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27182424/the-effect-of-training-intensity-on-vo2max-in-young-healthy-adults-a-meta-regression-and-meta-analysis
#19
Trisha D Scribbans, Stephan Vecsey, Paul B Hankinson, William S Foster, Brendon J Gurd
Exercise training at a variety of intensities increases maximal oxygen uptake (VO2max), the strongest predictor of cardiovascular and all-cause mortality. The purpose of the present study was to perform a systematic review, meta-regression and meta-analysis of available literature to determine if a dose-response relationship exists between exercise intensity and training-induced increases in VO2max in young healthy adults. Twenty-eight studies involving human participants (Mean age: 23±1 yr; Mean VO2max: 3...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27182423/metabolic-and-energy-cost-of-sitting-standing-and-a-novel-sitting-stepping-protocol-in-recreationally-active-college-students
#20
Charles J Fountaine, Josh Johann, Craig Skalko, Gary A Liguori
The purpose of this study was to compare the differences in metabolic and energy cost (MEC) of college students while seated, standing, and during a sitting/stepping protocol. Participants were assessed via indirect calorimetry for 20 min in each of the following conditions: 1) seated in a standard office chair, 2) standing in place, and 3) a sitting/stepping protocol in which participants performed 1 min of stepping in place at 90 bpm, sat for 9 min, then repeated the stepping and sitting sequence once more...
2016: International Journal of Exercise Science
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