Just before the start of a lap, we begin filming every movement of the swimmer with our above- and underwater cameras. Immediately after the lap has been completed, the swimmer can view the video images and play them back in delayed fashion. This provides information about, for instance, the position of the hip, the entry angle into the the water, and the speed at the 5- and 10-m line, as well as at the break-out. InnoSportLab De Tongelreep possesses an enormous dataset, which, among others, includes data of the fastest female starter ever, Ranomi Kromowidjojo. Swimmers can compare their start times with hers and those of many other elite swimmers.
We have a towing system to measure the drag of a swimmer or an object in the water. With this system we can pull a swimmer in streamlined position or a physical object, such as a mannequin, through the water. The towing system is mainly used to test swimming suits, but also plays a supportive role in more fundamental studies on drag.
The MAD system allows us to measure the active drag of a swimmer (MAD stands for measuring active drag). This means that we can monitor the drag while the swimmer is actively moving forward over the MAD system. Under certain conditions, the system can also provide valuable insights into force and speed. The MAD system is often used in combination with the towing system used for the testing of swimming suits.