Negotiating an obstacle course not only helps to condition your muscles, it also helps improve your balance and your confidence. Adult-oriented courses should be complex and include obstacles to jump over, obstacles for agility training, balancing beams, climbing ropes or nets, tunnels to crawl through, and ladders or bars for both vertical and horizontal climbing.
For those looking for something a little more exciting than the balance beam, parkour may be the answer. While it may look like acrobatics, parkour takes the obstacle course away from the balance beam and rope nets and brings it to the environment you have available to you -- be it an urban downtown or your local park. You'll find yourself running, jumping, climbing, balancing around benches, fountains and any other obstacle in your path as you learn the discipline.