Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout

KATIE SIGMUND felt the burn and showed off her bum after a sweaty workout.

The social media sensation is fast approaching par with fellow golfer Paige Spiranac in terms of her huge Instagram following.

8Katie Sigmund looks proud of her work in the gym8Katie's following online is closing in on Paige Spiranac'sCredit: Instagram @katiesigmond8She has also shared glam shots from a vacation in ItalyCredit: Instagram/ Katie Sigmond8The walls have rears as Katie rests on holiday in GreeceCredit: Instagram/katiesigmond

And the influencer again hinted at her rigorous regime in the gym as she posed for a rear-view selfie in lycra-style shorts and a sports bra.

Katie produced a great twist and pout as she revealed her toned body.

The American, 21, looked pink-faced after her exercise session.

But that's nothing compared to her colourful look in an array of daring snaps posted online in bright red and blue outfits, as well as tiny bikinis.

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She chose a tiny scarlet one-piece for Halloween and a sweeping crimson dress for glamorous side-on shots, then switched to a gown of ocean blue for luxurious images while on holiday aside the Italian coast.

Katie is now up to 3.2million Instagram followers, just 800,000 behind former professional golf player Paige.

And the many ways she's revved up her battle to become the queen of swing on social media include cheeky pics on a dirtbike.

She teased admirers with an invitation to "Hop on!"  as she prepared to roar off in the Californian desert.

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That time she wore a backless black number and thigh-high white boots.

But she was dressed in more traditional gym gear for her latest input on Instagram.

Paige Spiranac rival Katie Sigmond shows off bum in tight gym outfit as she shows off effects of new diet regime

And as Katie turned to look down at her phone, she added the caption "Cutting szn" - followed by a heart.

That could be a reference to the phase - or season - when body-toners reduce calorie intake in the hope of losing body fat but retaining muscle.

If so, it suggests Katie pushes herself to the limit with her fitness regime.

8Her golf-minded fans couldn't ask for more than tee and sunshineCredit: https://www.instagram.com/katiesigmond/8She teased her admirers with a 'hop on'' message when dirtbikingCredit: Instagram/katiesigmond8The TikTok star has an unusual way of preparing for shotsCredit: Instagram8Katie gave her followers a sleek Greek view on vacationCredit: Instagram @katiesigmond

Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout

Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout

Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout

Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout

Paige Spiranac rival Katie Sigmond shows off her bum in skintight shorts and sports bra after workout