Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to work out on a playground as an adult [title] Walk on the balance beam. [step] Most playgrounds have wooden beams of various elevations. Even if there isn't a specific balance beam, you may be able to find a slightly raised surface or a curb that you can use for the same purpose.

Ending1: [substeps] To start, walk with your legs out in front of you. To jump on the beam, lift one foot slightly off of the ground. Ending2: [title] Check for holes in the lower limbs or injured limbs. [step] Some young children will spring onto the beam as they fall and break their limbs through the drilled holes. Ending3: [substeps] Walk slowly at first until you find your balance. Turn and walk back slightly faster, then gradually increase your speed each time you cross. Ending4: Try swinging up and down in this position for a little of a challenge. Be careful not to knock over anything and risk hurting yourself if you fall.

Answer format: ending1/ending2/ending3/ending4