Imagine for a second the incredible strain that a transformation like that puts on your body. You're talking about a complete and total change in your physiology. Your bones shift, possibly break and are mended when placed in their new positions, you muscles expand, you grow entirely new bones, etc. That cannot be a painless and easy process. There's a reason that almost every werewolf movie shows the transformations as being incredibly painful. Now imagine something like that happening continuously within the confines of a few hours. Your heart would probably give out from the stress, as your heart rate is most likely hyper accelerated during this and your feeling all the pain that this transformation puts on your body. It taxes your heart, lungs, and mind, and could very well overload them if done too many times back to back. Your body consumes a lot of energy just powering your ordinary, day to day actions, and I can't imagine it'd find transforming to be easier.
You can only imagine the pain someone would go through during a transformation. The best reaction in my opinion ISN'T American Werewolf it's the British Being Human. George (the werewolf) during his first change his vampire friend talks about the werewolf transformation, saying that he (George) has a heart attack, suffers liver, kidney and stomach failure, the change STOPS all internal organs to the point a human would have died but the curse keeps him alive as all the internal organs shrink (yes shrink but i'd think they'd grow really) then his body has bones begin to snap,twist and reform, his organs start up but on full alert as if he was dying, pain that would kill someone, the curse shuts down the organ which would allow the pain to simmer, so he gets the full force of the pain.
The guy playing the werewolf screams high pitched in agony, as the Vampire guy says "just because he's stopped screaming, doesn't mean the pain his over, his vocal cords have just given up to the point he CAN'T make any more noise" it's look like agony o_o.
But then that change takes a few minutes, transformations like in Skyrim seem more Underworld based, and Raze (the black guy) seems to change without too much fuss. Lucian looks like he's in pain when he does though. But then again Elder Scrolls is none of those. Perhaps, merely perhaps, the body of the Werewolf becomes accustomed to it even somewhat due to the rapid change. As slower depicted changes seem incredibly painful. Except for the Howling the guy looks like he's becomming sixually pleasured by his change (then again he was a creep)
Could something like this result in death if there's something that goes wrong like the heart beating too fast or something?
In Being Human an Old Man Werewolf DID die because his old body couldn't take it. But the curse itself (if it's like it in Elder Scrolls I don't know) FORCES you to stay alive as much as possible.
Probably. I imagine that transforming into a werewolf is probably like running a marathon at a full sprint. You don't feel it in your beast form, likely because your body is producing huge amounts of adrenaline and the drive of your beastblood is keeping you on the move. However, I imagine transforming back and forth over and over would be akin to running a marathon at a full sprint, only to be tazzed and immediately forced to run another, without so much as a 30 second rest. It'd have to be a terrible strain on your body, and your rapidly beating heart could easily be overtaxed and possibly go into cardiac arrest.
That's true, perhaps the Ring of Hircine allows the transformation to be painless. Which is why in Skyrim it allows repeated changes, perhaps.
I always had the though that, if a Werewolf had been a Werewolf long enough, then the body would somehow adapt to the Transformation even to a small percentage. I mean people do train their endurance and pain threshold. But again, do we fully know how the full workings of the Werewolf transformation works in Elder Scrolls, as different canons. Being Human, Van Helsing, Underworld. All seem to have a different approach to the lasting effects and the ware on the body from Werewolf transformations.