AZ Central states that lunges are effective in strengthening legs, toning the buttocks, improving core strength and increasing hip flexibility. Lunges are used in warm up and strength training routines by those seeking to stay in shape, as well as amateur and professional athletes.
According to AZ Central, lunges use the body weight of the exerciser to strengthen quadriceps in the front thigh, hamstrings, calf muscles and gluteal muscles. They also strengthen core muscles in the back, pelvis, chest and abdomen. The strengthening of these muscles enhances the appearance of the buttocks and improves posture. Side and long lunges also prevent low back pain caused by hip flexors that have tightened from everyday tasks.