What is the drag effect on swimwear?

[JamesSwim]

Originally Posted by Bede735

My local pool is 25 metres long and there is a countdown clock poolside, so I thought I would try and sprint as fast as I could. So yesterday I did one length backstroke which clocked 35 seconds, and after a short rest did front crawl in 20 seconds. I was amazed at the difference in the type of stroke used, so surely there must also be differences in the type of suit you wear?

If you swam wearing a shirt and a pair of trousers that must be slower than wearing swim briefs, obviously. So how much slower would you be wearing knee length board shorts? Has anyone tried to make a comparison?

I haven't measured it but even when wearing mid-thigh length trunks I felt slower and felt more drag. That's why people train with drag suits. I actually wonder why they make specific drag suits. You can just wear board shorts and it will give you a work out. I suppose people want to wear something that resembles their normal suit (i.e. if they compete), so wearing board shorts may mess up your stroke or form?