Kim Kardashian has been hitting the gym and it shows. The reality star, 42, shared two selfies in her Instagram stories on Tuesday where she was flaunting the stunning results of her workout routine. The Skims founder showcased her buff biceps while wearing a high waist pair of black leggings and a black bra top for a selfie with CrushIt app founder Senada Greca, 40, and pal Dave Grutman. Results: Kim Kardashian has been hitting the gym and it shows. The reality star, 42, shared two selfies in her Instagram stories Tuesday, flaunting the stunning results of her workout routineIn one of the snaps, Kim showed off her strengthened muscles as she flexed her arm in a biceps curl. 'I mean look at these gainz we've been making,' was written across the Instagram story. A week ago, Senada, posted a photo of the two, praising The Kardashians star for her diligence. The Skims founder showcased her buff biceps while wearing a high waist pair of black leggings and a black bra top for a selfie with CrushIt app founder and trainer Senada Greca and pal Dave Grutman'The hardest working woman in the room! Yes you heard that right! It’s my honour to be training with Kim and to see the person that she truly is: hard working, dedicated, consistent and caring,' she said.'She puts in the work for 2 hours and never complains even when I push her past what she would think are her limits. 'I know the strength that lays within her, and now, together, we’re working on Kim stepping into her strength. So excited about this journey.'Kim responded to the praise, writing, 'I’m so excited for our journey.