PS Fitness

What PS Fitness does

PS Fitness, operating as Pintsize Fitness & Sports, is a children's fitness and martial arts instruction business founded in 2020 by Sarah Miller and headquartered in Pelham, NY with 8 employees. The company delivers programming in soccer, ninja fitness, and karate targeted at young children, originally as in-person instruction and subsequently adapted to online delivery following the COVID-19 pandemic.

The business distributes through multiple channels: a monthly subscription listing on the ActivityHero marketplace, 30+ city park facilities, afterschool programs, and partnerships with private preschools. An ancillary Shopify-based e-commerce merchandise store provides a secondary revenue stream tied to the brand. The underlying technology stack is limited to off-the-shelf marketplace and commerce platforms rather than proprietary infrastructure.

The revenue model combines recurring subscription fees for virtual and in-person classes with merchandise sales. There is no disclosed funding, M&A activity, or institutional capital structure — the company operates as a privately held micro-business dependent on founder-led operations. Customer relationships are predominantly direct-to-consumer with families, intermediated by ActivityHero for discovery and transactions.

Name

PS Fitness

Legal name

PintSizeSports.COM

Website

https://pintsizesports.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

PS Fitness (Pintsize Fitness & Sports) is a Pelham, NY-based children's fitness and martial arts instruction business, founded in 2020, delivering online and in-person soccer, ninja fitness, and karate classes via the ActivityHero marketplace, city parks, and school partnerships.

Ownership category

akta.pro rank

Product category

Children's Fitness and Martial Arts Instruction

NAICS

Sports and Recreation Instruction (61162), Fitness and Recreational Sports Centers (71394)

SIC

Services-Membership Sports & Recreation Clubs (7997), Services-Miscellaneous Amusement & Recreation (7990)

akta.pro industry

PRIMARYHSADAAAJ

Youth & Teen Personal Training

Home & Personal Services/Fitness, Wellness & Personal Training/Personal Training (In-Person & Virtual)

SECONDARYHSADADAG

Kids & Youth Martial Arts Programs

Home & Personal Services/Fitness, Wellness & Personal Training/Martial Arts & Self-Defense Training

SECONDARYEDAJAJAC

Physical Education (PE) & Fitness Programs

Education/K–12 / Primary & Secondary Education/K–12 Extracurriculars & Athletics (School-Run)

Keywords

• Children's fitness classes
• Online martial arts instruction
• Youth soccer training
• Kids agility training
• Monthly fitness membership

Headquarters

HQ city

Pelham

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Supply Chain, Technology or R&D

Revenue model

1. Monthly Membership - Online Classes: Recurring monthly subscription for access to online exercise and martial arts programs including Pintsize Soccer, Pintsize Ninja Fitness, and Pintsize Karate. Classes available via monthly membership through the ActivityHero platform.
2. Merchandise Sales: E-commerce sales of branded merchandise including T-shirts, hoodies, backpacks, tumblers, shoes, and slides through their Shopify storefront

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

PS Fitness (Pintsize Fitness & Sports) delivers online exercise and martial arts instruction for children through three program tracks: Pintsize Soccer (soccer skills and gross motor training), Pintsize Ninja Fitness (interactive agility and conditioning games), and Pintsize Karate (Okinawan Matsubayashi Shorin Ryu Karate with belt progression). Classes are sold primarily through a monthly membership subscription and registered via the ActivityHero marketplace. The company also sells branded children's merchandise (apparel, backpacks, tumblers, shoes, slides, and personalized items) through a Shopify storefront.

Product overview

PS Fitness (Pintsize Fitness & Sports) operates a unified online fitness and martial arts instruction platform for children, offering three core program offerings: Pintsize Soccer (online soccer skills), Pintsize Ninja Fitness (agility training), and Pintsize Karate (Matsubayashi Shorin Ryu martial arts). Programs are delivered through monthly membership subscriptions and are accessible online from home. The company also operates a complementary merchandise line (Pintsize Merch) featuring branded apparel, backpacks, tumblers, shoes, slides, holiday gifts, and personalized items. The product portfolio combines live instruction with merchandise, targeting families seeking structured physical activity programs for children.

Differentiator

Problem solved

Functional benefit

Products and services

• Pintsize Soccer Online soccer skills and fun games program for children, focused on gross motor skills, focus, and agility, practiced from home with in-person options in select areas.
• Pintsize Ninja Fitness Online interactive agility class for kids featuring games and challenges that improve strength, agility, balance, and focus, useful as conditioning for martial arts, gymnastics, and most sports.
• Pintsize Karate Online karate program teaching life lessons, self-defense, and earning colored belts through the authentic Okinawan system of Matsubayashi Shorin Ryu Karate, with in-person options in select areas.
• Pintsize Fitness & Sports Merchandise Branded merchandise storefront selling T-shirts and hoodies, backpacks and tumblers, shoes and slides, holiday gifts, and personalized items for children and families.

Quantifiable outcome

• Children who begin exercising at a young age have increased self-esteem, earn better grades, and continue to lead healthy, active lives into adulthood

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered core and minor.

• ActivityHerocoreGTM or Marketing PartnerActivityHero serves as the primary booking and registration platform for Pintsize Fitness classes. Parents register for online classes and free trials through ActivityHero. The partnership enables visibility to families actively searching for children's activities.
• City Park FacilitiescoreChannel Partner/ Reseller/ DistributorPintsize programs offered as enrichment classes and camps at over 30 different city park facilities. Provides physical footprint for in-person programming alongside online offerings.
• Afterschool Programs and Private PreschoolsminorChannel Partner/ Reseller/ DistributorPintsize Fitness programs delivered through afterschool programs and private preschools as enrichment programming for children.
• The Shugyokan DojominorStrategic or Co-development PartnerDojo in Gardena, California under Loeffler Sensei, where founder Sarah Miller holds her Shodan Yudansha in Matsubayashi Shorin Ryu Karatedo. Provides authentic lineage and training for the karate program curriculum.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Sportball: Sportball offers multi-sport and soccer programs for children ages 16 months to 12 years. It competes with Pintsize on parent-paid youth sports fundamentals instruction with multi-sport curriculums.
• GoNoodle: GoNoodle produces online movement, mindfulness, and fitness video content for elementary-age children, often used in schools and homes. It competes for the same online-engagement minutes and parent wallet as PS Fitness's Ninja Fitness and Soccer programs.
• Little Kickers: Little Kickers delivers preschool-aged soccer and multi-sport programs through franchised in-person classes worldwide, with growing online content. It is a direct comp to Pintsize Soccer, targeting the same gross-motor, parent-as-buyer segment.
• i9 Sports: i9 Sports runs youth sports leagues and clinics for ages 3–15 across multiple sports including soccer. It overlaps Pintsize's youth sports instruction mission with a regional-franchise, parent-pay model.
• U.S. Martial Arts (USA Martial Arts): USA Martial Arts operates karate and martial arts schools focused on belt progression and children's character development. It is comparable to Pintsize Karate's authentic Okinawan-style curriculum and belt progression value proposition.
• My Gym Children's Fitness Center: My Gym is a franchise network of children's fitness centers offering structured movement, agility, and gymnastics classes for ages 6 weeks to 10 years. It overlaps Pintsize's preschool/elementary fitness positioning with similar agility, balance, and focus claims.
• Tiger Schulmann's Martial Arts: Tiger Schulmann's is a New York-based chain of karate and mixed martial arts schools for children and adults. It directly competes with Pintsize Karate on karate instruction and the karate-belt progression narrative for kids, with comparable NYC-market positioning.
• Skyhawks Sports Academy: Skyhawks Sports Academy offers youth sports instruction (soccer, basketball, and multi-sport programs) for ages 2–14, with both online and in-person formats. It competes directly with Pintsize Soccer and the broader online youth skills instruction model.

Emerging players

• Gold Star Gymnastics: Gold Star Gymnastics is a regional youth gymnastics and conditioning operator with similar age range, agility/balance curriculum, and parent-pay model. It competes in the conditioning-conditioning-for-sports niche that Pintsize Ninja Fitness also targets.

Broad incumbents

• Peloton (Peloton Kids / Peloton App): Peloton is a scaled online fitness subscription platform that has expanded into family and kids' fitness content. It competes for the same parent subscription dollar for at-home children's fitness but does so as part of a much broader adult-focused portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/psfitnessandsports

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PS Fitness