Disclaimer: This is me just being an "outsider looking in" - just thoughts no concrete conclusions...
It was fantastic to see the sport science / fitness of the US women's national team getting good press during the world cup. It really did seem (from observation) that this was well deserved. Although the final result did not go their way, the team was able to press for the majority of the match with Japan which is very impressive. Credit where credit is due.
Science in the sport really has moved forward in leaps and bounds of late, especially in terms of on-field work and monitoring. The picture below, however, shows where sport scientists are "weak" in soccer. Weak being the operative word.
I am really not sure what is being trained here. Like athletes from other sports, soccer players need to be able to put more force through the ground (and opponents). This exercise will not achieve this goal. Possibly smoke and mirrors aimed at confusing the opposition? I hope so.