Get fit and look better in a mirror: Build lean muscle, reduce body fat, and have more endurance for your daily activities. Invest in your long-term health: Strength training has been shown to improve cholesterol and blood pressure, reduce inflammation, support heart health, and even promote longevity. Combat the effects of aging: In our early 30s, we start losing half a pound of lean muscle and gaining a pound of fat per year—and this only accelerates with age. This compromises our body composition, health, and overall quality of life. Strength training can slow down or reverse this process.