Scott Disick's girl is pretty tough

Kourtney Kardashian can certainly pack a punch.

The reality star has been showing off her boxing skills in a video taken from a brutal workout she did yesterday.

My Monday morning started like this…’ Kourtney, 34, captioned the footage on Instagram.

Scott Disick‘s girlfriend is seen vigorously beating a punching bag in the clip while a trainer encourages her.

Fans were left stunned by petite Kourtney‘s incredible stamina.

Who are you angry at??’ one follower quipped.

Wow good workout,’ another commented.

Watch Kourtney‘s boxing session below…

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Anna Francis