10KW5S5 - https://youtu.be/PjCSvTrrFN0 Trick yourself into working hard by alternating 20spm and 24spm every 4 minutes. You think you're getting an easier time at 20spm - but you're not really... 🚣 40 minutes - alternating 20spm and 24spm every 4 minutes (with no rests) 🚣‍♀️ See YouTube video for full description.