scholarly journals High-intensity interval training improves metabolic syndrome and body composition in outpatient cardiac rehabilitation patients with myocardial infarction

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Yaoshan Dun ◽  
Randal J. Thomas ◽  
Joshua R. Smith ◽  
Jose R. Medina-Inojosa ◽  
Ray W. Squires ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Metabolic Syndrome ◽  
Body Composition ◽  
Cardiac Rehabilitation ◽  
High Intensity ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
High Intensity Interval

scholarly journals High-Intensity Interval Training in Cardiac Rehabilitation: Impact on Fat Mass in Patients With Myocardial Infarction

2019 ◽  
Vol 94 (9) ◽  
pp. 1718-1730 ◽  
Author(s):  
Yaoshan Dun ◽  
Randal J. Thomas ◽  
Jose R. Medina-Inojosa ◽  
Ray W. Squires ◽  
Hsuhang Huang ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Cardiac Rehabilitation ◽  
Fat Mass ◽  
High Intensity ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
High Intensity Interval

scholarly journals Cardiorespiratory Responses During High-Intensity Interval Training Prescribed by Rating of Perceived Exertion in Patients After Myocardial Infarction Enrolled in Early Outpatient Cardiac Rehabilitation

2022 ◽  
Vol 8 ◽  
Author(s):  
Yaoshan Dun ◽  
Shane M. Hammer ◽  
Joshua R. Smith ◽  
Mary C. MacGillivray ◽  
Benjamin S. Simmons ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Blood Pressure ◽  
Heart Rate ◽  
Gas Exchange ◽  
Cardiac Rehabilitation ◽  
High Intensity ◽  
Perceived Exertion ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
High Intensity Interval

Objective: We aimed to determine the cardiorespiratory responses during, and adaptations to, high-intensity interval training (HIIT) prescribed using ratings of perceived exertion (RPE) in patients after myocardial infarction (MI) during early outpatient cardiac rehabilitation (CR).Methods: We prospectively recruited 29 MI patients after percutaneous coronary intervention who began CR within 2 weeks after hospital discharge. Eleven patients (seven men; four women; age: 61 ± 11 yrs) who completed ≥24 supervised HIIT sessions with metabolic gas exchange measured during HIIT once weekly for 8 weeks and performed pre- and post- CR cardiopulmonary exercise tests were included in the study. Each HIIT session consisted of 5–8 high-intensity intervals [HIIs, 1-min RPE 14–17 (Borg 6–20 scale)] and low-intensity intervals (LIIs, 4-min RPE < 12). Metabolic gas exchange, heart rate (HR), and blood pressure during HIIT were measured.Results: The mean oxygen uptake (V˙O2) during HIIs across 88 sessions of HIITs [91 (14)% of V˙O2peak, median (interquartile range, IQR)] was significantly higher than the lower limit of target V˙O2 zone (75% of V˙O2peak) recommended for the HII (p < 0.001). Exercise intensity during RPE-prescribed HIITs, determined as %V˙O2peak, was highly repeatable with intra-class correlations of 0.95 (95% CI 0.86– 0.99, p < 0.001). For cardiorespiratory adaptations from the first to the last session of HIIT, treadmill speed, treadmill grade, treadmill power, V˙O2HII, %V˙O2peak, and VE during HIIs were increased (all p < 0.05), while no difference was found for HR, %HRpeak and systolic blood pressure (all p > 0.05). V˙O2peak increased by an average of 9% from pre-CR to post-CR. No adverse events occurred.Conclusion: Our results demonstrate that HIIT can be effectively prescribed using RPE in MI patients during early outpatient CR. Participation in RPE-prescribed HIIT increases exercise workload and V˙O2 during exercise training without increased perception of effort or excessive increases in heart rate or blood pressure.

scholarly journals Effects of Two Workload-Matched High-Intensity Interval Training Protocols on Regional Body Composition and Fat Oxidation in Obese Men

Nutrients ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 1096
Author(s):  
Spyridon Tsirigkakis ◽  
George Mastorakos ◽  
Yiannis Koutedakis ◽  
Vassilis Mougios ◽  
Alan M. Nevill ◽  
...  
Keyword(s):  
Body Composition ◽  
High Intensity ◽  
Interval Training ◽  
Fat Oxidation ◽  
Peak Oxygen Uptake ◽  
High Intensity Interval Training ◽  
Randomized Design ◽  
Wide Range ◽  
Regional Body Composition ◽  
High Intensity Interval

The effects of two high-intensity interval training (HIIT) protocols on regional body composition and fat oxidation in men with obesity were compared using a parallel randomized design. Sixteen inactive males (age, 38.9 ± 7.3 years; body fat, 31.8 ± 3.9%; peak oxygen uptake, VO2peak, 30.9 ± 4.1 mL/kg/min; all mean ± SD) were randomly assigned to either HIIT10 (48 × 10 s bouts at 100% of peak power [Wpeak] with 15 s of recovery) or HIIT60 group (8 × 60 s bouts at 100% Wpeak with 90 s of recovery), and subsequently completed eight weeks of training, while maintaining the same diet. Analyses of variance (ANOVA) showed only a main effect of time (p < 0.01) and no group or interaction effects (p > 0.05) in the examined parameters. Total and trunk fat mass decreased by 1.81 kg (90%CI: −2.63 to −0.99 kg; p = 0.002) and 1.45 kg (90%CI: −1.95 to −0.94 kg; p < 0.001), respectively, while leg lean mass increased by 0.86 kg (90%CI: 0.63 to 1.08 kg; p < 0.001), following both HIIT protocols. HIIT increased peak fat oxidation (PFO) (from 0.20 ± 0.05 to 0.33 ± 0.08 g/min, p = 0.001), as well as fat oxidation over a wide range of submaximal exercise intensities, and shifted PFO to higher intensity (from 33.6 ± 4.6 to 37.6 ± 6.7% VO2peak, p = 0.039). HIIT, irrespective of protocol, improved VO2peak by 20.0 ± 7.2% (p < 0.001), while blood lactate at various submaximal intensities decreased by 20.6% (p = 0.001). In conclusion, both HIIT protocols were equally effective in improving regional body composition and fat oxidation during exercise in obese men.

scholarly journals Short-Term High-Intensity Interval Training on Body Composition and Blood Glucose in Overweight and Obese Young Women

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Zhaowei Kong ◽  
Shengyan Sun ◽  
Min Liu ◽  
Qingde Shi
Keyword(s):  
Body Composition ◽  
Blood Glucose ◽  
Cardiorespiratory Fitness ◽  
Young Women ◽  
High Intensity ◽  
Interval Training ◽  
Moderate Intensity ◽  
High Intensity Interval Training ◽  
Short Term ◽  
High Intensity Interval

This study was to determine the effects of five-week high-intensity interval training (HIIT) on cardiorespiratory fitness, body composition, blood glucose, and relevant systemic hormones when compared to moderate-intensity continuous training (MICT) in overweight and obese young women.Methods. Eighteen subjects completed 20 sessions of HIIT or MICT for five weeks. HIIT involved 60 × 8 s cycling at ~90% of peak oxygen consumption (V˙O2peak) interspersed with 12 s recovery, whereas MICT involved 40-minute continuous cycling at 65% ofV˙O2peak.V˙O2peak, body composition, blood glucose, and fasting serum hormones, including leptin, growth hormone, testosterone, cortisol, and fibroblast growth factor 21, were measured before and after training.Results. Both exercise groups achieved significant improvements inV˙O2peak(+7.9% in HIIT versus +11.7% in MICT) and peak power output (+13.8% in HIIT versus +21.9% in MICT) despite no training effects on body composition or the relevant systemic hormones. Blood glucose tended to be decreased after the intervention (p=0.062). The rating of perceived exertion in MICT was higher than that in HIIT (p=0.042).Conclusion. Compared with MICT, short-term HIIT is more time-efficient and is perceived as being easier for improving cardiorespiratory fitness and fasting blood glucose for overweight and obese young women.

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