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Kiera Jaston

Also known as Kiera Jane Aston, KJ, The Muscle Barbie, Themusclebarbie

Born
Oct 23, 1995age 30
height
5'4" (or 162 cm)
body type
Muscular
nationality
British

Career

Active 2018 – present

2016
2017
2018
Debut
2019
2020
2021
2022
2023
2024
2025
2026
Present

Biography

About Kiera Jaston

Edited by the community

Standing 5'4" and weighing 169 lbs, Kiera Jaston carries a muscular frame that is both powerful and sculpted. Her measurements are 36–25–37 (B–W–H), a combination of enhanced breasts and a thick, dense physique developed through years of competitive powerlifting and bodybuilding. She is 30 years old, born on October 23, 1995, in the United Arab Emirates, though she identifies as British and currently bases herself in the United Kingdom.

Kiera is a hybrid athlete: she competes as an IFBB Pro League bodybuilder in the Wellness division and as a competitive powerlifter. She originally competed in the Figure division before switching to Wellness, where her heavily hyper-trophied glutes and quad development are standout features. She is widely celebrated as one of the strongest pound-for-pound female pullers in the world. Her raw deadlift in training reached 275 kg (606.3 lbs), which is 3.57 times her body weight. She can also bench press up to 145 kg (320 lbs) and regularly reps out 240 kg (529 lbs) deadlifts for sets of 4 to 5 reps. She is working toward a 300 kg (661.4 lbs) pull at 75 kg body weight.

In addition to her athletic career, Kiera works as an adult model, fitness model, influencer, and dominatrix. She performs solo nudity and also appears in girl-girl and boy-girl scenes. As an influencer, she has amassed 398k followers on Instagram, where she posts fitness and lifestyle content. She is also active on TikTok and YouTube under the handle @kierajaston_fitness. She is an independent athlete and model, and she operates her own coaching platform for live and online sessions. She is a sponsored athlete for TBJP Nutrition (Trained by JP) and Conteh Sports, and she has been featured in strength media outlets such as Breaking Muscle and Fitness Volt. She earned her pro card at age 21, making her Europe's youngest IFBB Figure Pro at the time. Kiera is bisexual and has a tattoo collection spanning her arms and torso.

Record

Profile details

Personal

Years Active
2018-present (started around 22 years old; 8 years active)
Birthplace
United Arab Emirates
Ethnicity
Caucasian
Sexuality
Bisexual

Body

Hair Color
Blonde
Eye Color
Brown
Weight
169 lbs (or 77 kg)
Measurements
36–25–37 (B–W–H) · WHR 0.68

Performances

Solo
Nudity (Full)
Girl/Girl
  • Kissing
  • Boob Touching
  • Boob Licking
  • Fingering
  • Dildo
  • Oral
Boy/Girl
  • Blowjob
  • Vaginal

Extra

Instagram Followers
398k (as of May 2026)

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Frequently asked

How does Kiera's bodybuilding career connect to her powerlifting achievements?

Kiera competes in the IFBB Wellness division, which favors heavy lower-body development, and her powerlifting background directly supports that. Her raw deadlift of 275 kg (606.3 lbs) is a key part of her strength resume, and she regularly works with 240 kg (529 lbs) for sets of 4–5 reps.

What makes her 275 kg deadlift particularly notable?

That pull is 3.57 times her body weight, a ratio that places her among the strongest female pullers on a pound-for-pound basis. She is working toward a 300 kg (661.4 lbs) pull at a body weight of 75 kg.

What is her background in the IFBB?

She earned her pro card at age 21 in the Figure division, making her Europe's youngest IFBB Figure Pro at the time. She later transitioned to the Wellness division, building a heavier and denser silhouette.

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