The American Journal of Clinical Nutrition published a study that looked at whether fish oil had potential benefits for muscle and exercise.
We know that people who get more Omega 3 fish oils have been found to have a lower risk of heart disease. This study was done with a group of older women to see if they would be able to boost their muscle strength by adding fish oil supplements to their exercise routine.
The women were assigned to 1 of 3 different exercise groups where they performed strengthening exercises 3 times a week for 3 months. The other groups had the same sort of exercise regimen but they also took 2 grams of fish oil a day to see if that had different health impacts.
Researchers found that doing the strength training for 3 months plus taking fish oil did help increase muscle strength among patients who did both things. It is a bit unclear whether or not that translates into overall better health or if being a little stronger makes a difference to decrease accidents such as falls.
Although this was a good study, we would not recommend that you start taking fish oil if you have no other reason to (such as high triglycerides, elevated cardiac risks, etc.). If you are taking fish oil already and are having no side effects, this may be an extra benefit.