BOOST Your Open Water Swimming - boost your confidence and technique in open water. Make swimming 2km or 4km in open water no problem. This training plan is aimed at adjusting your pool swimming routine to work in specific open water sessions designed to help you improve your race times. This plan is designed for 4km and 2km longer swims (swim volume 5km at most) if you’re looking to improve on your open-water swim splits then this plan is for you! The sessions are focused around longer ...