Protein Enriched Diet, With The Use Of Lean Red Meat, Combined With Progressive Resistance Training Enhances Lean Tissue Mass And Muscle Strength And Reduces Circulating IL 6 Concentrations In Elderly Women A Cluster Randomized Controlled Trial

This study examined whether adding lean red meat to a resistance training program could help elderly women build muscle and improve their health markers better than exercise alone. Researchers worked with 100 women aged 60-90 living in retirement villages, dividing them into two groups. Both groups did resistance training twice weekly and took vitamin D supplements, but one group also ate about 5.5 ounces of cooked lean red meat six days per week, while the control group ate pasta or rice instead.

After four months, the women eating lean red meat showed significantly better results. They gained more total body lean muscle mass (about 1 pound more) and leg muscle mass, and experienced 18% greater improvements in muscle strength compared to the control group. The red meat group also consumed more protein overall - about 1.3 grams per kilogram of body weight daily versus 1.1 grams in the control group. Additionally, they showed a 16% greater reduction in IL-6, an inflammatory marker linked to aging and chronic disease.

The study found no negative effects on blood pressure or cholesterol levels from eating lean red meat regularly. The researchers noted that the protein from lean red meat helped optimize muscle protein synthesis when combined with resistance training, leading to better muscle building and reduced inflammation.

This research supports the clinical approach of combining adequate protein intake with strength training for healthy aging. It demonstrates that older adults may need higher protein intake than standard recommendations to maintain muscle mass and metabolic health, and that lean red meat can be a safe and effective protein source when part of a structured exercise program.