The best exercise for 60-year-olds is low impact and will help keep them active. Some good options are swimming, biking, or using the elliptical machine. These exercises are gentle on the joints and can help improve cardiovascular health.  Additionally, it is essential to focus on strength training to help maintain bone density. Exercises such as lifting weights or doing bodyweight exercises are perfect for this.  Finally, balance exercises are also crucial for seniors to help prevent falls. Tai chi and yoga are both excellent options.