There are a number of key elements that were incorporated into MONA’s backstroke from previous research with Aquanex. Here are three examples:
1) Many swimmers fail to increase force on the push phase. Consequently, MONA’s arm moves through the push phase into a stronger and stronger position.
2) Most swimmers have wasted time and motion on the entry. To minimize this limitation, MONA’s hand submerges until it is the deepest part of the arm so that it is immediately ready to begin generating force.
3) MONA’s torso rotates to 45o so that when the elbow flexes to 90o, the hand remains in an effective position below the surface.
More detail is available at the following links: