If you can’t float & you have to kick to stay on top of the body, the pull is less effective. For that reason alone, I think TI sets a good foundation for teaching the non-swimmer how to use their body position to float.
Sheila T says good body position should be able to be taught in one lesson, 2 at the most, and then it’s on to mastering the pull.
I’m still trying to master body position and will probably never get it right (adult onset swimmer, sinking legs…). I have to believe the hydrodynamic drag created by poor position totally swamps any gains using EVF (just look at the surface areas). Probably why I’m 10 to 12 secs faster per 100scy with a pullbouy. I dont think EVF would buy me 10 seconds by itself.
You need to correct your big leg sinking then. Yes, it’s true that if your legs are sinking so much that you’re getting 10sec/100 with a pull buoy, you gotta fix that first. But after you get those legs flat, I think you’ll be shocked at how hard it is to gain even 5sec/100 just by better streamlining.
If it were just streamlining and not significantly added power in the EVF position and it was 80% streamlining and 20% power/EVF, it would be entirely possible to swim fairly fast fast (like sub 1:20/100yd pace for distance) with zero hard swim efforts, and just a meticulous focus on reducing drag. I think you know what the answer to that training method would be.
As said above though, as a recent-onset adult swimmer, I do feel that for raw beginners and those slower than 2:00-2:20/100yds, I’d be more inclined to agree with you, it’s closer to the reverse of what Sheils says, with 80% streamlining and 20% EVF/power for that group. That’s why those 2:20/100yd beginners can make so much progress with no hard swimming, just as TI recommends, and why almost no coach would prioritize these slow swimmers to do hard intervals to generate arm power rather than focusing nearly exclusively on streamlining and energy conservation by reducing extra mvmts. However, get to even basic intermediate swim ability and that rate of improvement disappears nearly completely. (I know this having gone through the entire improvement to big plateau with this TI method when I started swimming.) Sheila’s book is clearly aimed more at the intermediate and above crowd who has fixed any leg sink that’s costing 10sec/100.
Light - You’re nailing it, I think this is exactly the group that Sheila is targeting. You have an excellent memory of the book from reading it 2 yrs ago, as the bold section above could have come straight out of the book:)