Group Fitness Classes on Hawaii Island with Sara Krosch
Movement
& Motivation
to Music
Join us for weekly in-person
strength focused group fitness classes on Hawaii Island
CURRENT group fitness CLASSES
Classes are held Wednesdays 3pm and 4pm at the Hilo YMCA and Fridays 4pm at the Puna Hongwanji in Kea'au, East Hawaii Island. Sessions feature strength-focused formats created and taught by Sara Krosch. Bring a mat, weights, and water to class. All other equipment provided. See class descriptions and the current class schedule below.
Flex & Flow/Pactive Fitness
This 45 minute class 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 maximizes every minute. Class consists 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 compound moves with body weight, dumbbells and an optional looped resistance band. Options are given for low to moderate intensity.
Bring your own mat and light to medium weight dumbbells. All other equipment provided.
Monthly Mash-Up
Last Friday Class Each Month at the Puna Hongwanji in Kea'au
Finish the month with this 45 minute session that combines the best blocks from recent Pactive Fitness and Muscle Hustle classes!
Class consists of a warm-up, 3 interval blocks focusing on strength, 3 choregraphed blocks stressing cardio, flexibility/balance, and core before cooldown stretches. Master compound moves with body weight, dumbbells, looped resistance bands, gliding disks, and balls. Options are given for low to moderate impact.
Bring your own mat and light to medium weight dumbbells. All other equipment provided.
Roll into Recovery
Extend your cool down with myofascial release equipment (foam rollers, massage balls, muscle scraping tools) to reduce soreness and speed recovery of major muscle groups. Optional "Roll into Recovery" follows the final class of the month in both locations. All equipment provided.
April - May 2026 Class Calendar
No classes Wednesday April 29 & Friday May 8
| Date |
Class Format |
Time |
Location |
| Wed Apr 15 |
Flex & Flow |
3-3:45pm |
Hilo YMCA |
| Wed Apr 15 |
Muscle Hustle |
4-4:45pm |
Hilo YMCA |
| Fri Apr 17 |
Muscle Hustle |
4-4:45pm |
Puna Hongwanji |
| Wed Apr 22 |
Flex & Flow |
3-3:45pm |
Hilo YMCA |
| Wed Apr 22 |
Muscle Hustle |
4-4:45pm |
Hilo YMCA |
| Fri Apr 24 |
Monthly Mash-Up + Roll into Recovery
|
4-4:50pm |
Puna Hongwanji |
| Fri May 1 |
Pactive Fitness |
4-4:45pm |
Puna Hongwanji |
| Wed May 6 |
Flex & Flow
|
3-3:45pm |
Hilo YMCA |
| Wed May 6 |
Muscle Hustle
|
4-4:45pm |
Hilo YMCA |
| Wed May 13 |
Flex & Flow |
3-3:45pm |
Hilo YMCA |
| Wed May 13 |
Muscle Hustle |
4-4:45pm |
Hilo YMCA |
| Fri May 15 |
Muscle Hustle |
4-4:45pm |
Puna Hongwanji |
| Wed May 20 |
Flex & Flow |
3-3:45pm |
Hilo YMCA |
| Wed May 20 |
Muscle Hustle |
4-4:45pm |
Hilo YMCA |
| Fri May 22 |
Pactive Fitness |
4-4:45pm |
Puna Hongwanji |
| Wed May 27 |
Flex & Flow + Roll into Recovery
|
3-3:50pm |
Hilo YMCA |
| Wed May 27 |
Muscle Hustle + Roll into Recovery
|
4-4:50pm |
Hilo YMCA |
| Fri May 29 |
Monthly Mash-Up + Roll into Recovery
|
4-5pm |
Puna Hongwanji |
Two East Hawaii Island Locations
Fridays at the Puna Hongwanji Community Hall in Kea'au. Cash, Venmo or punch cards accepted at this location.
Kea'au Directions
Wednesdays at the YMCA in Hilo. Non-YMCA members pay $10 drop in rate.
HILO DIRECTIONS
Save with a Punch Card
Try your first Big Island Active class at the Puna Hongwanji in Kea'au for free!
Individual classes are $7 or save with a 5-class punch card for $30. Pay with cash, card, or Venmo.
NOTE- Punch cards are only accepted at the Puna Hongwanji location.
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.
All BIA VIDEOS
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 program experience
- 9 years group fitness instruction
- Group fitness format creator: Flex & Flow/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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