What I've learned and most men should understand is - if she isn't into it, don't push it.
The worst thing you can do is tell a gal what you want her to look like...or what you want her to be like.
Now that said, you can play up what athleticism is there....
"Wow, honey you really have a naturally fit build, if you ever want to work out with me, I'd be flattered...?"
"Jeez babe, your flexibility is great, have you ever done any gymnastics...?"
"You want to go do an obstacle/workout course date and follow it up with a nice dinner to reward ourselves?"
One thing that a lot of women I meet have said is, I don't want to be gross and have a lot of muscle like Lou or Arnold -or- I don't want to get all veiny and Hulked out. Women are often afraid of the image of having a lot of muscle and think by picking up anything bigger than the 2.5lb dumbells will turn her into the next Cory Everson.
Digging deeper into that, many have a stereotype of what most fitness & figure athletes look like (year round)...and that stems from contest shots and workout shots where most of them are in their "competition/dieted down" state.
What I have told many women is "Look, what you see there is the extreme, a two week window of what those women look like during prep for a contest." Most often, they say "Really?" and then they are a bit more open to the idea and want to learn a bit more.
One thing that often catches their attention is the fact that:
more muscle = higher resting metabolism = more fat burning potential
If you really want to get a women into working out and all else fails, tell her that the more muscle her body has, the more fat she has the potential to burn. Most will be mesmorized by this and BAM their hooked.
Be forewarned though and know from experience once their hooked on working out, you'll never rest again! Seriously, I'm dead serious.
Rick Lohre
www.lohrecreative.com