our instructors

Train with the best


Group Exercise Health & Fitness Guru

Liene is an incredibly enthusiastic and positive individual who truly knows how to uplift others! Her ability to create a fun and enjoyable atmosphere in her classes is truly remarkable. 

It’s fantastic to hear that she has been acknowledged for her outstanding work as an instructor and is making a difference in promoting health and fitness.
Keep up the amazing work, Liene!

  • YMCA Exercise to music
  • Nutrition and Weight Management
  • Level 2 – Exercise for Children
  • Nutrition and Weight Management
  • Pilates Level 3 – Advanced International Qualification
  • Yoga Hether Fitness Academy, Aqua Fitness Academy YMCA
Personal Training & Group Exercise Guru

Marina’s dedication and experience in the fitness industry truly shine through. 

Her passion for staying fit and active is admirable, placing a high priority on taking care of her body to ensure she has the energy and stamina to excel in everything she does.

  • YMCA Level 3 Personal Trainer 
  • Les Mills Body Pump Advance International Qualification
  • Zumba & Zumba Kids 
  • Level 2 Exercise for Children 
  • Spin Qualification – YMCA 
  • Motivation for a Successful Lifestyle Change
For further information please  visit our Personal Training page
Personal Training & Group Exercise Guru

Agnieszka is versatile in both group exercise and Personal training offer classes in South London. Highly skilled professional and is we are thrilled to have the opportunity to pursue it as a PE teacher. 

 In her own words “Meeting new people and collaborating with Fit by Sonic brings us a lot of positivity and joy.” She is a great asset as part of a team and leading in teaching groups or workshops.

  • YMCA Level 3 Personal Trainer 
  • Nutrition and Weight Management
  • Les Mills Body Pump International Qualification
  • Spin – YMCA
  • Kettlebells, Boxing and Running Plans

For further information please  visit our Training page

Zumba Dance Guru

Sharon is a highly qualified professional group exercise instructor who offers exciting Zumba classes in a gym setting in the South London area. Additionally, she is a dedicated associate fitness trainer who collaborates with Fit By Sonic. Keep up the great work great energy and highly recommended.


  • Level 2 MCA Exercise to music
  • Zumba level 2
  • HITT Level 2
  • Motivation for a Lifestyle Change
  • Zumba Strong Nation Qualification 
Personal Trainer Group Exercise Health & Fitness Guru

 Marta is truly valued for her popularity in leading group exercise classes. 

Moreover, her vast 20 years of experience and expertise in offering Professional Coaching for Athletes and Personal Training services bring an extra special touch to our offerings.

Marta is our business partner. Please visit our Personal Training page for Martas full qualifications or our partner’s website with Marta’s 


One in a Million - FBS Mother

Our mentors, and mothers make the best entrepreneurs. Further information to follow 

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