Nikki Bella is no fool when it comes to rehab.

The longest-reigning Divas Champion has been sidelined since November with a neck injury, and recently had it surgically repaired. In order to work her way back into the ring, Bella as enlisted her boyfriend John Cena as her rehab coach.

Nikki Bella Would 'Love' To Be Mrs. Cena

On the next episode of "Total Divas," entitled "Rocky Road to Recovery," Bella turns to Cena for some help.

"Nikki commits the cardinal sin of mixing business with pleasure when she enlists John to be her rehab coach," the description reads via WrestlingInc.

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Though mixing business with pleasure is a dangerous game, there are many reasons Cena is a great choice as a rehab coach.

1) He's Not Human

Cena is a freak of nature and he displays that in the weight room all the time. The 15-time WWE World Heavyweight Champion is still defying the odds by working out nonstop despite having shoulder surgery less than two months ago:

2) He's A Strong Motivator

A peak at Cena's Twitter feed shows he loves playing the role of motivator. The face of the franchise always tweets out inspirational quotes to start the day on his account.

3) He Recovers Quickly

Sticking with Cena not being human, he always seems to recover quicker than expected. In 2008, he was slated to be sidelined for several months and to miss WrestleMania XXIV, but he rehabbed quickly and made a surprise return at the Royal Rumble that January. Cena also hinted he is working like a mad man to get back in time for WrestleMania 32, despite going under the knife in January.

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