Khloe Kardashian says she is ‘very compeтιтive’ with one of her sisters.

When they work out side by side, they always look over to see who is moving faster or exercising harder.

That is what the 38-year-old Good American designer told InStyle this week as she focused her chat on her health.

Khloe – who posed in a red top this week – has four sisters: older sisters Kourtney Kardashian, 43, and Kim Kardashian, 42. And she has two younger half sisters: 27-year-old Kendall Jenner and 25-year-old Kylie Jenner. Then there is her brother Rob Kardashian who is not often seen.

Can you guess which sibling Khloe competes with?

It is Kim Kardashian, a mother of four whose ex-husband is rapper Kanye West.

Khloe told the site that they look to see what the other has done in the gym.

The subject came up when she talked how compeтιтive the family is.

‘We are very compeтιтive, especially Kim and I. We’ll be like, “OK, I’m going to beat the meters you got,”‘ she shared with a laugh.

Kim and Khloe were not always this close.

It used to be Kourtney and Khloe who were best friends. But when Khloe welcomed her daughter True Thompson with ex Tristan Thompson, she leaned on Kim for advice.

Kim has daughters North and Chicago as well as sons Saint and Psalm.

Also in her interview, Khloe said she loved getting a Hydrow rower after being inspired by her mom Kris Jenner.

‘She [Kris] loves it. She also just had a hip surgery, and the rower is so good on your joints. Her mobility is great, but she doesn’t [want to have] hard impact on things.

‘And I’ve had three knee surgeries, and I also just like to switch up my cardio.

She then said the reason she turned to the gym was because of her divorce, which she has said many times in the past.

‘I didn’t really know what to do. Of course, in the beginning you [have to] get over that hump of it being really hard and something so new for you.

‘But I felt so accomplished. I’m sort of a control freak, but in life we can’t control everything. But the gym, what I put in it, I know I’m going to get out of it. And being a control freak — I’m proud of it — I love that I have that control.’