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Full-Text Articles in Kinesiology
Effect Of And Acute Bout Of Kettlebell Exercise On Glucose Tolerance In Sedentary Men: A Preliminary Study, Samantha L. Greenwald, Edward Seger, David Nichols, Andrew Ray, Todd C. Rideout, Luc E. Gosselin
Effect Of And Acute Bout Of Kettlebell Exercise On Glucose Tolerance In Sedentary Men: A Preliminary Study, Samantha L. Greenwald, Edward Seger, David Nichols, Andrew Ray, Todd C. Rideout, Luc E. Gosselin
International Journal of Exercise Science
International Journal of Exercise Science 9(4): 524-535, 2016. 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 …
The Effect Of A Moderately-Low And High Carbohydrate Intake On Crossfit Performance, Kurt A. Escobar, Jacobo Morales, Trisha A. Vandusseldorp
The Effect Of A Moderately-Low And High Carbohydrate Intake On Crossfit Performance, Kurt A. Escobar, Jacobo Morales, Trisha A. Vandusseldorp
International Journal of Exercise Science
International Journal of Exercise Science 9(4): 460-470, 2016. 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. Oxygen consumption (VO2), respiratory exchange ratio (RER), and blood lactate (BL) were also measured. Days 6-8, the CHO group increased CHO intake from <6 g/kg/day to 6-8 g/kg/day; the C group maintained their current intake of <6 g/kg/day. On days 6 and 7 both groups performed CrossFit workouts followed by a day of rest prior to day 9. There was a significant increase in repetitions completed in both groups in day 9 (vs. means score of day 1 + 5) (p = 0.002), but no differences between C and CHO groups (p = 0.111). However, the CHO group displayed a 15.2 repetition increase (+10.9%) in day 9, compared to 5.7 (+4.2%) by the C group. VO2, RER, and BL were not influenced by the experimental intervention. Our results suggest that the CrossFit-embraced practice of moderately-low CHO diets may be adequate in CHO during short periods of training, however, given the noted trend, extended training periods may be effected.
Oxygen Consumption And Substrate Utilization During And After Resistance Exercises Performed With Different Muscle Mass, Paulo Farinatti, Antonio G. Castinheiras Neto, Paulo Rs Amorim
Oxygen Consumption And Substrate Utilization During And After Resistance Exercises Performed With Different Muscle Mass, Paulo Farinatti, Antonio G. Castinheiras Neto, Paulo Rs Amorim
International Journal of Exercise Science
International Journal of Exercise Science 9(1): 77-88, 2016. 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. Total fat and carbohydrate oxidation rates were …