Fish oil is rich in n-3 (omega-3) polyunsaturated fatty acids, which have been shown to play a role in the plasma membrane and cell function of muscles. CL Rodacki, from Parana Federal University (Brazil), and colleagues studied 45 women, average age 64 years, all of whom engaged in a 90-day long strength training regimen. Fifteen of the study participants received 2 g of fish oil (0.4 g EPA and 0.3 g DHA) per day during the 90 days of strength training, and another 15 women received fish oil for 60 days prior to strength training as well as during the 90 days of training. Among the women given fish oil supplement, the researchers observed an improvement in muscle torque, as well as better performance in chair-rising exercises. Reporting that: “The inclusion of [fish oil] supplementation caused greater improvements in muscle strength and functional capacity,” the study authors conclude that: "Strength training increased muscle strength in elderly women.”