Should I be alternating my swim sessions/sets instead of repeating the same ones

For example, at the moment I’ve very been enjoying freestyle sprints, so my sessions tend to consist of lots of repeated 100m usually @1:50. + some technique drills. I swim 3 x a week and have mainly been doing the springs because I enjoy getting my HR up and keeps me from getting too cold in the pool! was wondering if changing up my sessions and having an endurance based session and/or a technique/IM strokes session is important in improvement /differnt purposes changing the sessions up might have?

Thanks!

submitted by /u/Lemonadeo1
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