Desperate
This is how desperate I can get. A couple of years ago I dug a hole in my yard, ran some pvc pipe to cheap black plastic,and a $35 pump/filter, tied a rope around my waist and I would swim non stop as long as I wanted. It was great training for everything (musles,breathing,etc...) except fpr one important thing- on race day my legs dragged like an ancor( that rope pulling on me, taught me bad posture). So I know I would train like a fool If I had the right equipment at home. I hope someone out there knows of some comparisons ?