A nurse is preparing to teach a female client about osteoporosis prevention. Which of the following recommendations should the nurse make for this client?

The correct answer is B: Walk for 30 minutes three to five times each week. Weight-bearing exercises, like walking, help improve bone density and prevent osteoporosis. Walking also helps strengthen muscles and improve balance, reducing the risk of falls and fractures. Performing water aerobics (choice A) can be beneficial for overall health but may not have the same impact on bone density as weight-bearing exercises. Increasing intake of vitamin B12 (choice C) is important for overall health but not specifically for osteoporosis prevention. Maintaining a lean body mass (choice D) is beneficial, but the focus should be on weight-bearing exercises for osteoporosis prevention.