Sentence:  The technique in continuous <WSD>headsprings</WSD> is rather different from that employed in performing a single <WSD>headspring</WSD> in that the head and hands are closer together, thus reducing resistance to forward rotation and enabling fast acceleration to take place. 
Meaning of the word marked with <WSD> tags:  A move in which the gymnast places both hands on the mat with the top of the head about 6 inches in front, pushes off with the hands while flipping the legs overhead, and lands on the feet.