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Before you attempt a front walkover, you'll need a spot where you can play around with new techniques and exercises without worrying about hurting yourself. Look for spots that are outside or have enough space for you to move around freely. If you're practicing outside, try to find an area with grass, sand or loose dirt, which can help cushion the impact if you fall.  Make sure your outdoor practice space is clear of rocks, twigs and other debris that could cause a painful mishap. See if you can spend the afternoon learning the front walkover in your school gymnasium or the local community center. Parks and playgrounds with rubberized flooring make great places for safely trying out new skills. Pull a friend, parent or sibling aside and ask them if they can spot you as you get the hang of difficult or scary skills. A spotter can guide you and support your weight as you run through the movement, which lets you focus on your technique. Almost anyone can be a spotter, so there's no reason not to have one on your first few tries.  To properly spot a front walkover, have your spotter place one hand across your lower back and give you a lift as you stand up out of the bridge.  Your spotter should be someone who is tall and strong enough to help hold you up. Mats and protective padded surfaces will serve to prevent injury in case you land incorrectly. They will also take away a good deal of fear, as you know you're unlikely to get hurt even if you mess up. Once you get more comfortable with the skill, you can slowly start building up the courage to do it without pads. Testing the waters with a mat can really speed up the learning process, so that by the end of the day you'll be doing walkovers with no hesitation.  You can buy fold-up tumbling mats designed specifically for gymnastics and cheerleading at most sporting goods stores. These will lay over any flat surface and store easily when you're finished with them. If you don't have mats available to you, use folded blankets, pillows or couch cushions to break your fall. Even though your goal is to learn to do a front walkover in the course of a day, there's no need to rush yourself. The bigger a hurry you're in, the more likely you are to make mistakes or develop bad habits. Spend a couple of hours or longer breaking down and drilling each phase of the technique and take your time overcoming intimidating challenges.  Create short-term goals for the day, such as "I'd like to be able to hold a bridge by the end of the afternoon," or "I'll try my first walkover without a spotter after dinner." Don't forget to take rest breaks occasionally. Tumbling is a strenuous activity, and you won't perform as well if you're tired.
Find a safe place to practice. Grab a spotter. Put down some mats. Go at your own pace.