Your swimming technique might be wrong – here's how you can correct it

Over the years, many people pick up the habit of moving their arms and legs with a time lag when doing the breaststroke. — Benjamin Nolte/dpa

As autumn settles in across the Northern Hemisphere and outdoor pools close, recreational swimmers are heading back inside to do their lengths.

Whether under a roof or open sky though, a lot of them display technique that leaves much to be desired.