scholarly journals How hard should you train? A meta-analysis of studies comparing body composition changes between interval training and moderate intensity continuous training

2021 ◽  
Author(s):  
James Steele ◽  
Daniel Plotkin ◽  
Derrick Van Every ◽  
Avery Rosa ◽  
Hugo Zambrano ◽  
...  
Keyword(s):  
Body Composition ◽  
Fat Mass ◽  
Lean Mass ◽  
English Language ◽  
Meta Analysis ◽  
Moderate Intensity ◽  
Point Estimate ◽  
Interval Estimate ◽  
Continuous Training ◽  
Main Model

Objectives: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Design: Systematic review and meta-analysis. Data sources: English-language searches of PubMed/MEDLINE, Scopus, and CINAHL conducted in accordance with PRISMA guidelines. Eligibility criteria for selecting studies: a) randomized controlled trials that directly compared IT vs MICT body composition using a validated measure in healthy children and adults; b) training was carried out a minimum of once per week for at least four weeks; c) published in a peer-reviewed English language journal or on a pre-print server. Results: The main model for fat mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity. The main model for lean mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity. The GRADE summary of findings suggested high certainty for both main model effects. In comparison to non-intervention control groups, the IT conditions resulted in small reductions in fat mass and trivial increases in lean mass. The MICT conditions also produced small reductions in fat mass, and trivial increases in lean mass. Analysis of regional fat loss revealed trivial between group comparative treatment effects for upper body, lower body and trunk regions with minimal differences between regions. Conclusion: Our findings provide compelling evidence that the intensity of effort during endurance exercise has minimal influence on longitudinal changes in fat mass and lean mass.

scholarly journals Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training

Sports ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 155
Author(s):  
James Steele ◽  
Daniel Plotkin ◽  
Derrick Van Every ◽  
Avery Rosa ◽  
Hugo Zambrano ◽  
...  
Keyword(s):  
Systematic Review ◽  
Body Composition ◽  
English Language ◽  
Meta Analysis ◽  
Interval Training ◽  
Moderate Intensity ◽  
Point Estimate ◽  
Interval Estimate ◽  
Continuous Training ◽  
Main Model

Purpose: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Methods: We searched English-language papers on PubMed/MEDLINE, Scopus, CINAHL, and sportrxiv for the following inclusion criteria: (a) randomized controlled trials that directly compared IT vs MICT body composition using a validated measure in healthy children and adults; (b) training was carried out a minimum of once per week for at least four weeks; (c) published in a peer-reviewed English language journal or on a pre-print server. Results: The main model for fat mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with moderate heterogeneity (−0.016 (95%CI −0.07 to 0.04); I2 = 36%). The main model for fat-free mass (FFM) effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity (−0.0004 (95%CI −0.05 to 0.05); I2 = 16%). The GRADE summary of findings suggested high certainty for both main model effects. Conclusions: Our findings provide compelling evidence that the pattern of intensity of effort and volume during endurance exercise (i.e., IT vs MICT) has minimal influence on longitudinal changes in fat mass and FFM, which are likely to minimal anyway. Trial registration number: This study was preregistered on the Open Science Framework.

scholarly journals Relativizing effects of high intensity interval training vs continuous moderate

2020 ◽  
Vol 22 ◽  
Author(s):  
Bruno Nicanor Mello da Silva ◽  
Leony Morgana Galliano ◽  
Fabrício Boscolo Del Vecchio
Keyword(s):  
Body Composition ◽  
High Intensity ◽  
Exercise Intervention ◽  
Meta Analysis ◽  
Interval Training ◽  
Moderate Intensity ◽  
Complete Analysis ◽  
High Intensity Interval Training ◽  
Continuous Training ◽  
High Intensity Interval

Abstract The production of systematic reviews and meta-analysis increased substantially. In this sense, we highlight those comparing Moderate-Intensity Continuous Training (MICT) and High-Intensity Interval Training (HIIT). It is known that meta-analyses of well-conducted studies are considered as a superior level of scientific evidence; therefore, it is relevant to critically analyze all those articles, especially speaking about the absence of differences between MICT and HIIT reported in previous studies. Widely, analyzing studies included in a meta-analysis frequently is possible to identify a lack of crucial information to the understanding of the exercise intervention, and this can skew readers interpretation and may conduct an equivocate comprehension of the results. In meta-analysis regarding the effects of MICT and HIIT in body composition, the relativization of the full length of training time of each intervention is frequently lacking. Data from previously published meta-analysis was reanalyzed, verifying higher relative reductions of body fat percentage to the HIIT group in comparison to the MICT group when considered the duration of interventions. In this sense, we suggest that all meta-analysis about this subject need not only to provide complete analysis in body composition but also consider analysis relativized of time spent training.

scholarly journals Is interval training the magic bullet for fat loss? A systematic review and meta-analysis comparing moderate-intensity continuous training with high-intensity interval training (HIIT)

2019 ◽  
Vol 53 (10) ◽  
pp. 655-664 ◽  
Author(s):  
Ricardo Borges Viana ◽  
João Pedro Araújo Naves ◽  
Victor Silveira Coswig ◽  
Claudio Andre Barbosa de Lira ◽  
James Steele ◽  
...  
Keyword(s):  
Body Fat ◽  
Fat Mass ◽  
Meta Analysis ◽  
Interval Training ◽  
Moderate Intensity ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Continuous Training ◽  
Total Body Fat ◽  
Total Body

ObjectivesTo compare the effects of interval training and moderate-intensity continuous training (MOD) on body adiposity in humans, and to perform subgroup analyses that consider the type and duration of interval training in different groups.DesignSystematic review and meta-analysis.Data sourcesEnglish-language, Spanish-language and Portuguese-language searches of the electronic databases PubMed and Scopus were conducted from inception to 11 December 2017.Eligibility criteria for selecting studiesStudies that met the following criteria were included: (1) original articles, (2) human trials, (3) minimum exercise training duration of 4 weeks, and (4) directly or indirectly compared interval training with MOD as the primary or secondary aim.ResultsOf the 786 studies found, 41 and 36 were included in the qualitative analysis and meta-analysis, respectively. Within-group analyses showed significant reductions in total body fat percentage (%) (interval training: −1.50 [95% CI −2.14 to −0.86, p<0.00001] and MOD: −1.44 [95% CI −2.00 to −0.89, p<0.00001]) and in total absolute fat mass (kg) (interval training: −1.58 [95% CI −2.74 to −0.43, p=0.007] and MOD: −1.13 [95% CI −2.18 to −0.08, p=0.04]), with no significant differences between interval training and MOD for total body fat percentage reduction (−0.23 [95% CI −1.43 to 0.97], p=0.705). However, there was a significant difference between the groups in total absolute fat mass (kg) reduction (−2.28 [95% CI −4.00 to −0.56], p=0.0094). Subgroup analyses comparing sprint interval training (SIT) with MOD protocols favour SIT for loss of total absolute fat mass (kg) (−3.22 [95% CI −5.71 to −0.73], p=0.01). Supervised training, walking/running/jogging, age (<30 years), study quality and intervention duration (<12 weeks) favourably influence the decreases in total absolute fat mass (kg) observed from interval training programmes; however, no significant effect was found on total body fat percentage (%). No effect of sex or body mass index was observed on total absolute fat mass (kg) or total body fat percentage (%).ConclusionInterval training and MOD both reduce body fat percentage (%). Interval training provided 28.5% greater reductions in total absolute fat mass (kg) than MOD.Trial registration numberCRD42018089427.

scholarly journals Dietary interventions to improve body composition in men treated with androgen deprivation therapy for prostate cancer: a solution for the growing problem?

2021 ◽  
Author(s):  
Lisa Umlauff ◽  
Manuel Weber ◽  
Nils Freitag ◽  
Ciaran M. Fairman ◽  
Axel Heidenreich ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Body Composition ◽  
Androgen Deprivation Therapy ◽  
Fat Mass ◽  
Lean Mass ◽  
Muscle Wasting ◽  
Meta Analysis ◽  
Androgen Deprivation ◽  
Dietary Advice ◽  
Dietary Interventions

Abstract Background Androgen deprivation therapy (ADT) has adverse effects on body composition, including muscle wasting and body fat accumulation, which may be attenuated by nutrition therapy. This systematic review summarises available evidence on the effects of dietary interventions on lean mass, fat mass and body mass index (BMI) in men treated with ADT for prostate cancer. Methods MEDLINE, Embase, Web of Science and ClinicalTrials.org were searched from inception through December 2020. We included all controlled trials evaluating effects of supplementation or dietary interventions on body composition in men with prostate cancer receiving continuous ADT. Methodological quality of the studies was assessed using the Cochrane Collaboration’s risk of bias tool. Meta-analysis was performed using a random effects model to calculate standardised mean differences between intervention and comparator groups. (PROSPERO; CRD42020185777). Results Eleven studies (n = 536 participants) were included. Seven studies investigated the effects of dietary advice interventions, e.g. individual or group counselling, and four studies included a nutritional supplement. Eight studies combined the dietary intervention with exercise. Nine studies reported sufficient data for inclusion in the meta-analysis. Dietary advice and supplementation interventions combined were not associated with significant changes in lean mass (0.05 kg; 95% CI: −0.17, 0.26; p = 0.674; n = 355), fat mass (−0.22 kg; 95% CI: −0.45, 0.01; p = 0.064; n = 336) or BMI (−0.16 kg*m−2; 95% CI: −0.37, 0.04; p = 0.121; n = 399). Dietary advice interventions alone were associated with a significant fat mass reduction (−0.29 kg; 95% CI: −0.54, −0.03; p = 0.028; n = 266). Conclusions Most studies were dietary advice interventions targeting caloric restriction, which showed the potential to reduce fat mass but did not increase lean mass in men treated with ADT. Future interventions should investigate whether a combination of dietary advice and protein supplementation with concomitant resistance exercise could counteract ADT-induced muscle wasting.

scholarly journals Acute and Chronic Effects of Low-Volume High-Intensity Interval Training Compared to Moderate-Intensity Continuous Training on Glycemic Control and Body Composition in Older Women with Type 2 Diabetes

Obesities ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 72-87
Author(s):  
Alexis Marcotte-Chénard ◽  
Dominic Tremblay ◽  
Marie-Michelle Mony ◽  
Pierre Boulay ◽  
Martin Brochu ◽  
...  
Keyword(s):  
Body Composition ◽  
Older Women ◽  
Interval Training ◽  
Moderate Intensity ◽  
Continuous Training ◽  
Glucose Levels ◽  
Mild Hyperglycemia ◽  
Low Volume ◽  
High Intensity Interval

Objective: To compare the acute and chronic effects of low-volume high-intensity interval training (HIIT) to moderate-intensity continuous training (MICT) on glycemic control, body composition and continuous glucose monitoring (CGM) in older women with type 2 diabetes (T2D). Methods: Thirty older women (68 ± 5 years) with T2D were randomized in two groups—HIIT (75 min/week) or MICT (150 min/week). Glucose homeostasis (A1c, glucose, insulin, HOMA-IR2) and body composition (iDXA) were measured before and after the 12-week exercise intervention. During the first and last week of training (24-h before and 48-h after exercise), the following CGM-derived data were measured: 24-h and peak glucose levels, glucose variability and time spent in hypoglycemia as well as severe and mild hyperglycemia. Results: While lean body mass increased (p = 0.035), total and trunk fat mass decreased (p ≤ 0.007), without any difference between groups (p ≥ 0.81). Fasting glucose levels (p = 0.001) and A1c (p = 0.014) significantly improved in MICT only, with a significant difference between groups for fasting glucose (p = 0.02). Neither HIIT nor MICT impacted CGM-derived data at week 1 (p ≥ 0.25). However, 24-h and peak glucose levels, as well as time spent in mild hyperglycemia, decreased in HIIT at week 12 (p ≤ 0.03). Conclusion: These results suggest that 12 weeks of low-volume HIIT is enough to provide similar benefit to MICT for body composition and improve the acute effect of exercise when measured with CGM.

scholarly journals Effects of Resistance Circuit-Based Training on Body Composition, Strength and Cardiorespiratory Fitness: A Systematic Review and Meta-Analysis

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 377
Author(s):  
Domingo Jesús Ramos-Campo ◽  
Luis Andreu Caravaca ◽  
Alejandro Martínez-Rodríguez ◽  
Jacobo Ángel Rubio-Arias
Keyword(s):  
Systematic Review ◽  
Body Composition ◽  
Cardiorespiratory Fitness ◽  
Fat Mass ◽  
Meta Analysis ◽  
Aerobic Performance ◽  
Favorable Effect ◽  
Post Intervention ◽  
Strength Performance ◽  
Rest Time

We assessed the effects of resistance circuit-based training (CT) on strength, cardiorespiratory fitness, and body composition. A systematic review with meta-analysis was conducted in three databases, ending on March, 2020. Meta-analysis and subgroup analysis were used to analyze the effects of pre–post-intervention CT and differences from control groups (CG). Of the 830 studies found, 45 were included in the meta-analysis (58 experimental groups (n = 897) and 34 CG (n = 474)). The CT interventions led to increases in muscle mass (1.9%; p < 0.001) and decreases in fat mass (4.3%; p < 0.001). With regard to cardiorespiratory fitness, CT had a favorable effect on VO2max (6.3%; p < 0.001), maximum aerobic speed or power (0.3%; p = 0.04), and aerobic performance (2.6%; p = 0.006) after training. Concerning strength outcome, the CT increased the strength of the upper and lower extremities. Only the magnitude of strength performance appears to be influenced by the training (number of sessions and frequency) and the training status. Moreover, low and moderate intensities and short rest time between exercise increase the magnitude of change in fat mass loss. Therefore, CT has been shown to be an effective method for improving body composition, cardiorespiratory fitness, and strength of the lower and upper limbs.

scholarly journals Body composition in childhood: effects of normal growth and disease

2003 ◽  
Vol 62 (2) ◽  
pp. 521-528 ◽  
Author(s):  
J. C. K. Wells
Keyword(s):  
Body Composition ◽  
Childhood Obesity ◽  
Fat Mass ◽  
Lean Mass ◽  
Normal Weight ◽  
Fat Free Mass ◽  
General Interest ◽  
Childhood And Adolescence ◽  
Adult Disease ◽  
Increased Risk

Body composition in children is of increasing interest within the contexts of childhood obesity, clinical management of patients and nutritional programming as a pathway to adult disease. Energy imbalance appears to be common in many disease states; however, body composition is not routinely measured in patients. Traditionally, clinical interest has focused on growth or nutritional status, whereas more recent studies have quantified fat mass and lean mass. The human body changes in proportions and chemical composition during childhood and adolescence. Most of the weight gain comprises lean mass rather than fat. In general, interest has focused on percentage fat, and less attention has been paid to the way in which lean mass varies within and between individuals. In the general population secular trends in BMI have been widely reported, indicating increasing levels of childhood obesity, which have been linked to reduced physical activity. However, lower activity levels may potentially lead not only to increased fatness, but also to reduced lean mass. This issue merits further investigation. Diseases have multiple effects on body composition and may influence fat-free mass and/or fat mass. In some diseases both components change in the same direction, whereas in other diseases, the changes are contradictory and may be concealed by relatively normal weight. Improved techniques are required for clinical evaluations. Both higher fatness and reduced lean mass may represent pathways to an increased risk of adult disease.

Abstract 17105: Is There a Difference in Lean and Fat Mass in HF Patients Based on NYHA Classifications (I-II versus III-IV)?

Circulation ◽  
2018 ◽  
Vol 138 (Suppl_1) ◽  
Author(s):  
Christine Haedtke ◽  
Debra K Moser ◽  
Susan J Pressler ◽  
Terry Lennie
Keyword(s):  
Body Composition ◽  
Fat Mass ◽  
Lean Mass ◽  
Nyha Class ◽  
Class I ◽  
Unexpected Finding ◽  
Class Iii ◽  
Medication Regimen ◽  
Cross Sectional ◽  
Nyha Classification

Introduction: As NYHA Class increases from I (ordinary physical activity does not cause undue fatigue), to Class IV (Symptoms are present while at rest) physical limitations become severe. It has previously been shown that HF patients have increased fat within the muscle thus decreasing exercise performance and tolerance. It is unclear if all NYHA classes are similarly affected. Hypothesis: HF patients with NYHA class III-IV will have more fat and less lean mass than those with NYHA class I-II. Methods: Secondary data analysis using cross sectional data from N=253. The parent study was a multicenter study about nutrition and body composition among patients with HF (preserved or reduced, and NYHA classification I-IV) who had been on a stable medication regimen, able to participate in dual-energy X-ray absorptiometry scan and/or BodPod body composition measures, able to read and speak English, and had no cognitive impairment. Women and men were analyzed separately due to known differences in fat and lean mass. Results: Table 1: Sample characteristic’s Testing the hypothesis using 2-way ANOVA and comparing the percentage of body weight that is lean and fat mass in NYHA class I-II vs III-IV found the interaction of gender and NYHA was not significant in either % lean or %fat (p=0.221, 0.190 respectively). NYHA class by itself was not significant (p=0.067) in %lean but was significant in %fat (p=0.046). Gender was significant in both %lean and %fat with men having 9.6% less fat (1.139 SE) and 9.8% more lean mass (1.066 SE) (p≤0.001). NYHA class III-IV had 2.3% (1.139 SE) more fat than those in NYHA class I-II. The R squared was 0.265 and adjusted R squared was 0.256. Conclusions: Part of our hypothesis was correct in that NYHA class III-IV had more fat mass than those in class I-II, but no difference was found in lean. This is an unexpected finding as healthy people gain fat mass while losing lean mass as they age. Additional studies are needed to further examine this result.

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