high-intensity interval training

<h4>Background</h4>Chronic Obstructive Pulmonary Disease(COPD) leads to reduced exercise capacity, lung function, and muscle dysfunction, highlighting the need for effective rehabilitation. Exercise is a key component of COPD management.<h4>Purpose</h4>This study aims to compare the effectiveness of high-intensity interval training (HIIT) and Moderate-Intensity Continuous Training (MICT) on functional capacity, pulmonary function, and muscle performance in individuals with COPD.<h4>Methods</h4>Eight electronic databases were systematically searched from inception to August 2025. Data extraction and quality assessment were independently performed by two reviewers. Methodological quality was assessed using the PEDro scale and the JBI Critical Appraisal Checklist. The risk of bias was evaluated using the Cochrane Collaboration's Tool and the ROBINS-I tool.<h4>Results</h4>Twelve studies with 401 participants were included. Seven of the included studies involved patients with GOLD stage III (severe COPD), and five involved patients with GOLD stage II (moderate COPD). HIIT did not demonstrate a statistically significant superiority over MICT in improving lung function parameters (<i>p</i> > .05). The combined mean difference for FEV₁ was 6.84 (95% CI: -1.59 to 15.28; <i>p</i> = .11) and the mean difference for FEV₁/FVC was 1.15 (95% CI: -8.98 to 11.28; <i>p</i> = .82). In terms of functional capacity, MICT showed superiority for VO₂peak (MD =  -41.79 mL/min, 95% CI [-74.77, -8.81], <i>p</i> = .01; I² = 39%, <i>p</i> = .12), while HIIT significantly improved 6MWT performance (MD = 14.63 m, 95% CI [1.00, 28.25], <i>p</i> = .04; I² = 33%, <i>p</i> = .22); no significant difference was observed for 12MWT (MD =  -55.00 m, 95% CI [-147.40, 37.40], <i>p</i> = .24). In terms of muscle function, HIIT provided greater benefits than MICT, including improvements in respiratory pressure, quadriceps endurance, handgrip strength, and muscle fiber composition.<h4>Conclusion</h4>HIIT is superior to MICT in improving selected functional capacity outcomes and muscle function in COPD patients, and shows comparable effects to MICT in other functional measures. HIIT is a viable alternative training method; further research is needed to determine optimal protocols to maximize its benefits.

matched text: “high intensity interval training”

BackgroundPeople with HIV (PWH) have increased risk for cardiovascular diseases and other age-related comorbidities. These risks can be reduced through moderate to vigorous physical activity (MVPA), but MVPA can be difficult to sustain over time. PurposeWe tested tailored text messages added to motivational interviewing (MI) to sustain MVPA among PWH. Messages were created based on Two Minds Theory and matched to daily survey responses about exercise barriers. Methods118 PWH ages [&ge;] 50 were initially randomized to high-intensity interval training or continuous moderate-intensity exercise. After 16 weeks, 92 participants were re-randomized to receive either tailored messages plus MI, or educational control messages, for 12 weeks. Both groups completed daily barrier surveys and wore an ActiGraph monitor for 1 week/month. ResultsPWH still receiving messages at 28 weeks maintained their MVPA, ending at M = 48.8 minutes per day (SD = 45.8, n = 22/29), compared to a decrease among PWH in the educational-control group, ending at M = 40.7 (SD = 24.6, n = 25/32), p = .01 for the group-by-time interaction. Findings were similar using both actigraphy and self-reported MVPA, and were robust to attrition based on intent-to-treat analysis. PWH in the tailored-messaging group also reported higher exercise self-efficacy and better perceived health over time, relative to those in the educational-control group. ConclusionsAn automated tailored-messaging intervention led to sustained MVPA. Tailored messages were superior to non-tailored educational messages, and may help PWH maintain their long-term health. Exploratory analyses suggested these effects were additive to motivational interviewing.

matched text: “high intensity interval training”