Hold on with your dominant hand. You can either grip the handhold with you palm facing up, or with an over grip with the palm facing down (Brazilian style).; make sure you have a good grip. Sometimes you are provided with a glove for your gripping hand.
2. Body actions
1. Focus on squeezing with your thighs. Too many people think the control is on the one hand you're holding on with. You should be using your leg muscles to "root" you to the bull.
2. Relax your upper body. The ride operator is going to try to use your upper body weight against you when the bull bows down in front and the rear tips up. Most people get rolled off the front during this maneuver. Your best strategy is to point your heels together and try to lean back when the bull dives forward to counter the momentum and then rhythmically shift your weight the opposite way when the bull tips up in the front. Most importantly, keep your upper body loose and relaxed--if you keep it stiff, the momentum will swing you off the bull.
1. Use your free hand for balance. Think about how a tightrope walker uses their hands to maintain balance; you should be doing the same with your free hand. Although it might look like people wave it around just to look cool, it really can help you stay on the bull. Holding a hat in that hand might help, too!
2. Shift your weight. At times, the operator will make the bull go up, down, left, right and circles. Shifting your weight will help.
- If the bull goes up with the head up and rear down, shift your weight in your pelvic area down.
- If the bull goes down, with rear up and head down, shift your pelvic area up and lean back just a bit.
- If the bull goes left, try to lean a bit right. If the bull goes right, then try leaning a bit left.
- When the mechanical bull spins in circles, try to lean in the opposite way, so if it spins left, then lean a bit right. If the bull goes right, then lean left.
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Source from: https://www.wikihow.com/Ride-a-Mechanical-Bull