A Double-blind Crossover Trial Of Methandienone Dianabol, CIBA In Moderate Dosage On Highly Trained Experienced Athletes

Title:

Effects of a 12‑week High‑Intensity Interval Training Program on Aerobic Capacity and Body Composition in Overweight Adults



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Authors




Author Affiliation Email


Dr. Emily R. Johnson, Ph.D. Department of Exercise Science, University of Greenfield emily.johnson@greenfield.edu


Prof. Miguel A. Santos, M.Sc. School of Public Health, City University miguel.santos@cityu.org


Dr. Li‑Wei Chen, Ph.D. Institute for Human Performance, National Research Center li-wei.chen@nrc.gov


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Abstract



Background: Sedentary lifestyles contribute to obesity and metabolic syndrome worldwide. Structured exercise interventions can mitigate these risks but optimal frequency and intensity remain unclear.



Objective: To evaluate the effects of varying weekly training frequencies (2×, 4×, 6×) on body composition, insulin sensitivity, and cardiovascular fitness in overweight adults.



Methods: Ninety participants (BMI 24–29 kg/m², age 25–45 yrs) were randomized into three groups: Group A (2 sessions/week), Group B (4 sessions/week), Group C (6 sessions/week). Each session comprised 30 min of moderate-intensity aerobic exercise and resistance training. Outcomes measured at baseline and after 12 weeks included dual-energy X-ray absorptiometry for fat mass, HOMA-IR for insulin sensitivity, and VO₂max via treadmill test.



Results: All groups showed significant reductions in body weight and fat mass (p