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.

Last Friday Class Each Month in Kea'au

Monthly Mash-up

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.

March - April 2026 Class Calendar

No classes Friday March 13 (weather cancellation), Wednesday March 18 (Spring Break Youth Camp at YMCA) , and Friday April 10 (Merrie Monarch)

Date	Class Format	Time	Location
Wed Mar 4	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Mar 4	Muscle Hustle	4-4:45pm	Hilo YMCA
Fri Mar 6	Pactive Fitness	4-4:45pm	Puna Hongwanji
Wed Mar 11	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Mar 11	Muscle Hustle	4-4:45pm	Hilo YMCA
Fri Mar 20	Muscle Hustle	4-4:45pm	Puna Hongwanji
Wed Mar 25	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Mar 25	Muscle Hustle	4-4:45pm	Hilo YMCA
Fri Mar 27	Monthly Mash-Up	4-4:45pm	Puna Hongwanji
Wed Apr 1	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Apr 1	Muscle Hustle	4-4:45pm	Hilo YMCA
Fri Apr 3	Pactive Fitness 100th Class Celebration!	4-4:45pm	Puna Hongwanji
Wed Apr 8	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Apr 8	Muscle Hustle	4-4:45pm	Hilo YMCA
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	4-4:45pm	Puna Hongwanji
Wed Apr 29	Flex & Flow	3-3:45pm	Hilo YMCA
Wed Apr 29	Muscle Hustle	4-4:45pm	Hilo YMCA

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 purchased in 2026 expire after 3 months. 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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