Effects of HIIT and MICT on cardiovascular risk factors in adults with overweight and/or obesity: A meta-analysis

Abstract

ObjectiveThe purpose of this study was to evaluate the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on cardiovascular disease (CVD) risk factors in adults with overweight and obesity.MethodsTwenty-two articles were included by searching six databases, the total number of subjects was 620 in these articles. Outcomes were synthesised using a random-effects meta-analysis of the Standardized mean difference (SMD) in CVD risk factors.ResultsHIIT and MICT resulted in statistically significant reductions in Weight, BMI, fat%, total cholesterol(TC), and improvement in VO2max. Compared with MICT, subgroup of durations of HIIT training interval ≥2 min can significantly increase VO2max (SMD = 0.444, 95% CI:0.037~0.851,P = 0.032), subgroup of energy expenditure of HIIT equal to MICT can significantly increase VO2max (SMD = 0.399, 95% CI:0.106~0.692,P = 0.008).ConclusionsHIIT appears to provide similar benefits to MICT for improving body composition, VO2maxand TC, but HIIT spent less time than MICT by 9.7 min on one session. HIIT is superior to MICT in improving cardiopulmonary fitness when durations of HIIT training interval ≥2 min or energy expenditure of HIIT same as MICT. PROSPERO ID: CRD42016045835.

High-Intensity Interval Circuit Training Versus Moderate-Intensity Continuous Training on Cardiorespiratory Fitness in Middle-Aged and Older Women: A Randomized Controlled Trial

“…Our results are in accordance with various studies showing that the application of both HIICT and MICT succeeded in increasing the VO 2max values for subjects with cardiovascular diseases [4,24], as well as in healthy elderly and middle-aged people [38]. Similarly, in line with the better trend shown by HIICT, a meta-analysis showed that HIIT improved VO 2max more than MICT in overweight or obese adults [39]. Despite the fact that our study measured the VO 2max estimated, the tendency of the results was in the same line.…”

Rates of compliance and adherence to high-intensity interval training in insufficiently active adults: a systematic review and meta-analysis protocol

“…Although both HIIT and MICT demonstrate beneficial physiological outcomes for active and insufficiently active populations (i.e., not meeting recommended physical activity guidelines) [5][6][7][8][9][10], both types of exercise have potential advantages and disadvantages. HIIT has been regarded as a time-efficient option that may elicit amplified physiological adaptations compared to MICT [3,9].…”

“…Although both HIIT and MICT demonstrate beneficial physiological outcomes for active and insufficiently active populations (i.e., not meeting recommended physical activity guidelines) [5][6][7][8][9][10], both types of exercise have potential advantages and disadvantages. HIIT has been regarded as a time-efficient option that may elicit amplified physiological adaptations compared to MICT [3,9]. Despite this, there is a debate as to whether HIIT is an appropriate training method for insufficiently active individuals due to questions of affective response, motivation levels, self-regulation, and adherence rates in this demographic [11][12][13][14].…”

“…With its recent rise in popularity [16] and questions of whether HIIT can be adhered to long-term, the field is in need of a review to determine whether HIIT should be considered a feasible exercise modality. Where originally an abundance of research focused on the physiological benefits of HIIT and its comparison to more traditional forms of exercise such as MICT [i.e., 9], the pragmatic utility of such benefits can only be achieved if individuals are sustainably engaging in HIIT on their own. However, due to the field's infancy and unstandardized methods of collecting real-world physical activity data, little attention has been given to compliance rates to such interventions and whether these interventions are indeed promoting an increase in regular longterm MVPA engagement, with one literature review of 14 interventions noting widely variable methods of reporting compliance and attrition [17].…”

Treinamento intervalado de alta intensidade e contínuo de moderada intensidade reduzem interleucina-6, mas exercem limitadas mudanças cardiometabólicas em mulheres obesas: estudo randomizado e controlado

“…Pois, depende da intensidade e do tempo realizado na mesma, para gerar mudanças cardíacas (débito cardíaco) e perfiféricas (consumo de oxigênio e produção de lactato) Laursen, 2013aLaursen, , 2013b. Apesar destas ressalvas, o TIAI é considerado uma estratégia tempo-eficiente para indivíduos saudáveis e doentes, uma vez que inúmeras evidências demonstram melhora de saúde cardiometabólica, com concomitante redução de tempo dispendido na sessão (Little et al, 2011;Gilen, Gibala, 2014;Madsen et al, 2015a;Gilen et al, 2016;Su et al, 2019).…”