Top Fitness Influencers on YouTube, Instagram and TikTok

Influencer marketing has revolutionized fitness brand strategies. Fitness influencers provide innovative approaches to diverse workout and cardio routines, expert fitness advice, and motivational content. Brands should leverage the authenticity of famous fitness influencers for successful marketing campaigns. Who are the top fitness influencers today? Let’s get started. 

Top Fitness Influencers on Instagram in 2025

1. Chris Bumstead [@cbum]: 25.8M Followers

 One of the top fitness influencers on Instagram is Chris Bumstead. Chris is known for his achievements in the International Federation of Builders’ Classic Physique division. Further, Chris is known for his aesthetic physique which fits the classic physique category’s ideals. 

Chris inspires a new generation of fitness and bodybuilding enthusiasts. His social media posts include training routines, preparation for competitions, and diet plans. Chris has brand partnerships with Raw Nutrition, Gymshark, Bum Energy, and Revive MD. Given his experience, Chris is a suitable workout influencer to consider for brand collaborations. 

2. Kayla Itsines [@kayla_itsines]: 15.8M Followers

https://www.instagram.com/kayla_itsines/

Kayla Itsines is a top fitness influencer on Instagram with over 15.8 followers. As an Australian personal trainer, Kayla is the writer of fitness eBooks like Ultimate Meal Plans and Bikini Body Guides. She also owns a workout app named Sweat with Kayla. She has partnered with brands like P.E. Nation and Medela.  

3. Lean Beef Patty [@leanbeefpatty]: 5.7M Followers

https://www.instagram.com/leanbeefpatty/?hl=en

Officially known as Particia, Lean Beef Patty is another popular fitness influencer on Instagram. She gained a huge social media following her impressive physique specifically her muscular build attained through bodybuilding and strength-building techniques. She is also committed to promoting women’s empowerment. Lean Beef Patty also provides tips on recovery, nutrition, and mental aspects of fitness. 

Lean Beef Patty has partnered with brands like Helimix and Youngla to promote their fitness products. 

4. Krissy Cela ( @krissycela): 3.3M Followers

https://www.instagram.com/krissycela/?hl=en

Another top fitness influencer is Krissy Cella who began her fitness journey while in law school. Krissy’s commitment to fitness together with her desire to empower women made her a notable fitness influencer on Instagram. She does comprehensive workout programs that focus on mental health, flexibility, and strength training. 

Krissy has so far partnered with brands like Barbie and KFC. This makes her an experienced influencer for brand collaborations. 

5. Sophie van Oostenbrugge (@gainsbybrains): 2.4M Followers

https://www.instagram.com/gainsbybrains/

Sophie van Oostenbrugge is another famous fitness influencer on Instagram. Originally from the Netherlands, she uses an evidence-based approach to nutrition and training. Oostenbrugge inspires her followers to pursue fitness goals sustainably and intelligently. She founded the GAINSBYBRAINS fitness app and has 1.6 million YouTube subscribers. She is the brand ambassador at Women’s Best. 

Top Fitness Influencers on TikTok in 2025

With 1.04 billion monthly active subscribers, TikTok is also home to popular fitness influencers.  Here’s a list of the best fitness influencers on TikTok in 2025. 

1. Demi Bagby (@demibagby): 14.2M Followers

https://www.tiktok.com/@demibagby?lang=en

Demi Bagby is another popular social media fitness influencer with over 14.2 million followers on TikTok. Demi is known for her agility, strength, and inspirational backstory. Unlike other influencers, Demi’s story is unique. Want to hear more about it? 

In 2014, Demi had a cheerleading accident that left her with a major back injury. With the possibility of never walking again, her determination fueled her recovery. This is what made her pursue a life of physical workout and fitness. In her content, she engages in acrobatics, adventure sports, and extreme workouts. Demy has partnered with brands such as Lifted Trucks and Nutrabolt.  

2. Leanbeefpatty (@leanbeefpatty): 8.3M Followers

https://www.tiktok.com/@leanbeefpatty?lang=en

Leanbeefpatty is a notable workout influencer on TikTok with over 8.3 million subscribers. She came to the limelight due to her impressive physique, especially her muscular build attained by strength training and bodybuilding. 

Other than sharing workout fitness videos, she also engages her followers by providing mental health, nutrition, and recovery tips. Her approachable demeanor and expertise in the field make her a suitable influencer for brand collaborations. 

3. Antonie Lokhorst (@antonielokhorst): 4.1M Followers

https://www.tiktok.com/@antonielokhorst

Antonie Lokhost is one of the top fitness influencers in 2025.  Antonie is mostly known for his impressive feats of agility and strength like muscle-ups, handstands, and complex bodyweight exercises. Antonie also offers well-rounded guidance on wellness and health. Beyond his fitness prowess, Antonie is also one of the most successful gym influencers having partnered with brands like Hugo Boss. 

4. Ulisses Jr. (@ulissesworld): 3.1M Followers

https://www.tiktok.com/@ulissesworld?refer=creator_embed

Ulisses World is one of the most celebrated gym influencers on TikTok. With over 3.1 million followers, he uses his exceptional muscle build to educate his audience. Ulisses Jr. emphasizes the significance of rigorous training, a balanced diet, and a positive mindset to attain physical excellence. His workout plans and programs include a mix of hypertrophy, conditioning work, and strength training. 

Ulisses Jr. is the brand a...