Which is why I'm baffled as to how so many tour professionals use this frame. Even if the tour version differs from the standard stock. It's still doesn't suit that whippy baseliner style.
It would depend on how their racquets are balanced and what specs they are used to. It's just a matter of building up the strength and conditioning.
If you started doing 100 push-ups a day, the first day it would be almost impossible and you would be very sore the next day. If you kept it up for a month, you'd be doing it much easier... and if you did it for 6 months or a year, you wouldn't even notice the 100 push-ups the next day... it would be routine. If you did it for years and years... you would have a very fit, strong, and conditioned body that would handle hours of endurance and exercise.
Most of my racquets have a SW of around 340-350 range, so if my body got used to that, it would then be able to execute any shot in any style.
Nadal adds quite a bit of weight at 12 o'clock and has a higher SW (from reports I've heard) and he has that whip motion. The Tour professionals have been playing with their set-ups for years and years, they have strengthened up and conditioned their bodies to perform at their desired specs. It takes time, patience, and perseverance, which is what most recreational players just aren't prepared to put in. It's not their job, it's their pass-time/ fun/ hobby.
Just my opinion... but I could be wrong.