Mixed
Twelve weeks of high-intensity resistance training (70-80% 1RM) significantly improves isokinetic muscle function (peak torque and total work) and hemorheological properties (erythrocyte deformability and aggregation) in middle-aged obese women, despite failing to produce significant changes in body composition, muscle hypertrophy (cross-sectional area), or blood lipid levels.
For middle-aged obese women, a 12-week resistance training program (3 days/week, 70-80% 1RM) will significantly improve muscle strength and blood flow properties (hemorheology) without necessarily changing body weight, muscle size, or blood lipids. Do not stop training if the scale or blood lipid panels don't change immediately; the functional benefits are real and significant. Focus on the feeling of strength and health markers beyond just weight.
The present study verified that our resistance training program resulted in greater muscle function, decreased fat mass, and improved hemorheological properties.
Why this rating
Randomized controlled trial with clear inclusion/exclusion criteria, though the sample size is small (n=28) and the duration is relatively short (12 weeks).
Source
Effects of 12 Weeks of Resistance Training on Body Composition, Muscle Hypertrophy and Function, Blood Lipid Level, and Hemorheological Properties in Middle-Aged Obese Women
Ji-Soo Seo et al. · Reviews in Cardiovascular Medicine · 2023
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