Group Fitness Classes on Hawaii Island with Sara Krosch
Motivation
& Movement
to Music
Join us for weekly in-person group fitness classes on Hawaii Island
CURRENT group fitness CLASSES
Classes are held Fridays 4pm at the Puna Hongwanji in Kea'au, East Hawaii Island. Sessions feature strength-focused formats created and taught by Sara Krosch: Pactive Fitness and Muscle Hustle.
Bring a mat, weights and water to class. All other equipment provided. See class descriptions and the current class schedule below.
Pactive Fitness
This 45 minute classes covers all the bases of physical fitness: cardio, strength, balance & flexibility. Class consists of a warm up, resistance segments using dumbbells and an optional looped resistance band, cardio section to get our hearts pumping, core strength segment and a yoga-inspired flow focusing on stretching and mobility. New choreography every class so you'll never get bored! Options are given for low to moderate intensity.
Bring your own mat and light to medium weight dumbbells. All other equipment provided.
Muscle Hustle
This 45 minute interval training class gets the work done quick! Class consisit of a warm up and 7, 5 minute segments of alternating 30 seconds work/10 seconds break. Fresh choreography each class focusing on upper body, lower body and core strength utilizing compond moves with body weight, dumbbells and an optional looped resisitance band. Options are given for low to moderate intensity.
Bring your own mat and light to medium weight dumbbells. All other equipment provided.
January 2026 Class Calendar
No In-Person Class January 23
| Date |
Class Format |
Time |
| Fri Jan 2 |
Pactive Fitness |
4-4:45pm |
| Fri Jan 9 |
Muscle Hustle |
4-4:45pm |
| Fri Jan 16 |
Pactive Fitness |
4-4:45pm |
| Fri Jan 30 |
NEW Class Format! |
4-4:45pm |
Save with a Class Pass
Try your first Big Island Active class for free!
Individual classes are $7 or save with a 5-class punch card for $30. Pay with cash, card, or Venmo.
Beginning in 2026, punch cards expire 3 months after purchase.
Convenient
Puna Location
Join us at the Puna Hongwanji
Community Hall in Kea'au,
East Hawaii Island
Directions
Try a Class On-Demand
Visit the Big Island Active YouTube Channel for a variety of recorded classes including Pactive Fitness, Muscle Hustle, PiYo, P90X, Barre, Foam Rolling Workshops and more.
visit our YouTube channel
Newest BIA Workout Videos
Sara Krosch
Meet your instructor
- ACE Certified Personal Trainer & Group Fitness Instructor
- National Board Certified Health & Wellness Coach
- RRCA Certified Running Coach
- Yoga Body Certified Breath Coach
- Certified National Diabetes Prevention Program Coach
- Founder & Director of Vivawell, Hawaii Island-based health promotion nonprofit organization
- MA- Health Communication & Promotion
- BS-Teaching
- 20 years community health experience
- 8 years group fitness instruction
- Group fitness format creator: Pactive Fitness, Muscle Hustle, AMRAP & Roll
- Workshop creator: Breath for Heath and Stretch & Roll
- Program creator: Walkstars-Walking for Fitness, GLOW: Green Light on Wellness
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