Weight-bearing exercises, such as running, walking, and resistance training, are the most effective for building bone density. These exercises work against gravity, stimulating bone remodeling and increasing bone strength. High-impact activities provide additional benefits by encouraging bone formation and minimizing bone loss, particularly crucial for individuals—especially women—at risk of osteoporosis. It is advisable to incorporate a variety of weight-bearing exercises into regular fitness routines to optimize bone health and lower the risk of fractures.