Mixed
A 10-week intervention combining a hypocaloric high-protein diet (40% carb, 30% protein, 30% fat) with progressive increases in daily physical activity (adding 4500 steps/day) significantly reduces body weight, fat mass, and reverses insulin resistance and metabolic syndrome in overweight premenopausal women.
To improve metabolic health and lose weight, focus on a sustainable caloric deficit with a higher protein intake (around 30% of calories) and gradually increase your daily step count by 1500 steps every two weeks until you are 4500 steps above your baseline. Do not rely on carnitine supplements, as they did not provide additional benefits in this study.
Moderate increases in physical activity and a hypocaloric/high protein diet resulted in multiple beneficial effects on body anthropometrics and insulin sensitivity... Ten of 19 participants with insulin resistance became insulin sensitive and 7 of 8 participants with the MetSyn no longer had the syndrome after the intervention.
Why this rating
Randomized controlled trial design with a control group (placebo), though the primary analysis pooled groups due to lack of carnitine effect, maintaining internal validity for the lifestyle intervention.
Source
Weight Loss Favorably Modifies Anthropometrics and Reverses the Metabolic Syndrome in Premenopausal Women
Ingrid E. Lofgren et al. · Journal of the American College of Nutrition · 2005
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