How to do Push-up with one arm in elbow plank : Exercise Video
                    
                     
                                        
                    
                            
                        
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                                1
                                    Start in a plank position, one forearm on the ground, other arm straight.
                             
                        
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                                2
                                    Keeping forearm on the ground, perform a push-up with the other arm. Repeat with same arm for this segment. Switch arms for each following segment.