What is a one-sentence summary of the following article?
Better yet, until you are very experienced at riding, never go for a ride alone. Ask an experienced rider to go with you. Another rider can help you slow a runaway horse, or can get help if you are injured in a ride. Particularly if you are inexperienced at riding, do not ride a horse that is untrained or not fully broken. You should always ride a horse that is at your skill level, and you should get to know the horse and its personality before riding. Some horses startle easily or exaggerate their responses to a pull on the reins or a tap on the sides. Riding a laid-back, well-tested horse is the safest way to avoid your horse bolting unexpectedly. Horseback riding, like any sport, carries some potential for injury no matter how cautious you are. Wearing a helmet will protect your head from injury if you happen to be thrown from your horse or if you have to make an emergency jump from a running horse. One study found that horseback riders not wearing helmets were four times more likely to die due to injuries from riding than those who wore helmets. Attractive riding helmets are easy to find if you ride English style. While less common for Western-style riders, helmets are still important for safety; you can wear an English style helmet or another helmet approved for riding. Look for the letters ASTM-SEI, which indicates the helmet has been safety-approved. Although it seems like this would increase your grip and make you less likely to fall, it can also lead to a severed or disjointed hand if there is a true emergency. Hold the reins securely with one hand, and hold the saddle horn with your other hand. NEVER let go of the reins and horn while riding. Wearing riding gloves can increase your grip on the reins and make it less likely that they will slip from your grasp. Just as you should do while driving a car, an alert horseback rider should stay alert and constantly rehearse scenarios in her mind of what she would do in case of emergency. As you ride, think about what you would do if your horse suddenly bolted at any given point in the ride. Watch your surroundings for safe routes, avoiding areas that would be hazardous if your horse suddenly bolted (for example, avoid riding your horse near vehicular traffic or near cliff edges).

Summary:
Let others know you are out for a ride. Ride a trusted mount. Wear a helmet. Never wrap the reins around your hand. Stay alert.