Lunges are great for building muscle mass and improving your cardiovascular health. Squats are great for building bone density and strengthening muscles. Both exercises can help improve your overall fitness level. Lunges are great for beginners who want to build their leg muscles without putting too much stress on their knees. They are also good for people who have knee problems. Squats are great if you want to strengthen your legs and back. They are also great for people who want to lose weight.