New to swimming as exercise, need some tips.

Hi. Recently started swimming. Currently doing 40 minutes 2x per week. I do breaststrokes (with fixed head) and reversed breaststrokes on my back at moderate speed. I am now thinking about how to make it harder for when i get stronger. The alternatives i was thinking about is:

1. Up the time so maybe 60 minutes 2x per week.

2. 40 minutes 3x per week

3. 40 minutes 2x per week but swim faster

Thoughts?

submitted by /u/jonas_ost
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