Kelly Matthews Biography: Age, Height, Net Worth, Boyfriend, Strength Coach, TikTok, Career, Instagram

Kelly Matthews is a celebrated American fitness influencer, strength coach, content creator, and online trainer known as the ultimate “gym big sister.”

Through her empowering strength training programs on the Ladder app (Team Limitless), athletic workouts, honest lifestyle content, and partnerships with brands like Oner Active and Promix, she motivates women to train like athletes, build muscle, and embrace confidence in the gym while balancing real life.

Quick Facts

• Full Name: Kelly Matthews
• Stage Name: Kelly Matthews
• Born: December 28, 1989
• Age: 36 years old
• Birthplace: Boston, Massachusetts, United States
• Nationality: American
• Ethnicity: American
• Occupation: Fitness Influencer, Strength Coach, Content Creator
• Height: 5 ft 7 in (170 cm)
• Religion: Christianity
• Parents: Mr. and Mrs. Matthews
• Siblings: Unknown
• Spouse: Unknown
• Children: Unknown
• Relationship: Dating
• Net Worth: $1,800,000 USD

Early Life And Education

Kelly Matthews was born on December 28, 1989, in Boston, Massachusetts, and raised by her parents Mr. and Mrs. Matthews. She grew up playing soccer and developed a strong foundation in athletics from a young age. She later moved to Austin, Texas, where she built her career as a strength coach while staying connected to her Boston roots. Her religion is Christianity. She has no publicly known siblings.

Career

Kelly Matthews began sharing her fitness journey on TikTok and Instagram as @kellylmatthews, quickly growing to millions of followers with practical gym advice, glute-focused training, athletic performance workouts, and motivational content for women. She created Team Limitless on the Ladder app, offering structured programs that emphasize strength, muscle growth, and training like an athlete rather than restrictive dieting.

As an Oner Active Move Ambassador and Promix athlete (code KELLY), she collaborates on clothing, supplements, and debloat products while posting honest training vlogs, form tips, and lifestyle resets. Known for her tall, athletic build and no-nonsense approach, she inspires followers to lift heavy, eat enough, and enjoy the process.

Based in Austin, Texas, she continues creating daily content that blends heavy lifting, mobility, and real-talk motivation for women of all levels.

Social Media

• Instagram Handle: @kellylmatthews
• TikTok Handle: @kellylmatthews

Personal Life

Kelly Matthews is in a relationship and has openly shared glimpses of couple moments, including letting her boyfriend narrate her day in fun videos. She is a proud dog mom to multiple adopted fur babies, including Lucy (12 years old, adopted when Kelly was 23) and others like Gus.

No past relationships are widely documented beyond her current partner. She is currently in a committed relationship and balances intense training, content creation, coaching, and family life with her pets while enjoying Austin’s active lifestyle. She is 36 years old. Her height is 5 ft 7 in (170 cm).

Net Worth

Kelly Matthews’ net worth is estimated at $1,800,000 USD. Her income primarily comes from TikTok and Instagram brand sponsorships with Oner Active and Promix, online training programs through Team Limitless on Ladder, social media monetization, affiliate promotions, and content creation focused on women’s strength training and athletic fitness.