To evaluate the effect of omega-3 supplementation combined with whey protein intake on lean mass and strength gains in older adults performing resistance exercise. Participants will be randomized into the 4 groups. The placebo group will receive 4 g per day of corn oil and 40 g per day of maltodextrin. The omega 3 + placebo group will receive 4 g per day of fish oil and 40 g per day of maltodextrin. The whey protein + placebo group will receive 40g per day of whey and 4g per day of corn oil. The omega 3 + whey group will receive 4g per day of fish oil and 40g per day of protein. All will perform the same exercise protocol for 12 weeks

Inclusion Criteria:

• Postmenopausal women (at least 1 year of menstrual interruption, self-reported);
• To be able to practice strength exercises;
• To be able to carry out supplementation;
• Do not present physical, orthopedic or cardiovascular complications that prevent the performance of physical exercises;
• No history of stroke or acute myocardial infarction;
• Not being a smoker and/or alcoholic;
• Do not perform hormone replacement therapy;
• Do not use anti-inflammatory drugs;
• To have normal kidney function;
• To submit a medical certificate of health that proves that the individual is able to perform exercises.

Exclusion Criteria:

• Do not provide the necessary information for the development of the study;
• Individuals with diseases previously diagnosed and undergoing treatment, such as type II diabetes mellitus, cancer, rheumatoid arthritis, high blood pressure, dyslipidemia, cardiovascular, and kidney and/or liver diseases.