MUSCLE MAMI’S SEASON

CHALLENGE

No subscription needed. Join today for $20.

SCAN TO DOWNLOAD THE APP

Muscle Mami’s is a 21-day challenge built for the moms who lift, the moms who want to lift, and the moms who are one decent playlist away from becoming that girl in the weight room.

We partnered with
‍Shay Diaz (@shaydiazfit)

Coach, mom, and someone who actually understands real-life schedules.

WHAT YOU’LL GET:

21 days of workouts that tell you exactly what to lift

A full meal plan built by Shay

Entry to win:

$250+ in prizes
A lifetime FitnessAI subscription

Slay now.
Thank Shay later.

Join the Challenge

PROGRESS SHOULD BE PREDICTABLE

AI-driven progressive overload that adjusts in real time - so you keep growing without burning out.

Person holding a smartphone displaying a workout app with exercise sets and reps, wearing a black digital watch, near gym equipment.

Know Exactly What to Lift

AI-powered workouts built from millions of real training sessions. No guessing sets, reps or weights.

Woman at gym holding water bottle and smartphone with workout schedule showing exercises for Day 1, Day 2, and Day 3.

Flexible Training

5-30 minute sessions that adapt to your schedule and equipment.

Train smarter starting today.

Subscribe to FitnessAI

Abstract blue geometric network forming the rough shape of South America on a black background.

SMTWTFS

Structured Challenges. Real Stakes.

Focused challenges built to drive muscle growth, lean results, and consistency - with rewards on the line.

Join Muscle Mami’s Challenge

Smartwatch displaying fitness stats including 69 BPM heart rate, bench press 135 lbs x 7 reps, and set counts on a black band.

LET THE DATA DO THE HEAVY LIFTING

Smarter adjustments. Better results.

Wearable Integration

Adaptive Recovery

Body Composition Tracking

KNOW EXACTLY HOW TO MOVE - EVERY REP, EVERY SET.

Every workout is programmed for muscle growth and fat loss - with guided demos so you lift correctly, every time.

Lift with Correct Form

Guided videos and muscle visuals keep your technique sharp

Smart Progression

Weights and reps adjust as you improve - automatically

TRUSTED BY MILLIONS

What Real Users Are Saying

5 MILLION + DOWNLOADS

4.8 App Store Rating

100 MILLION+ SMART WORKOUTS COMPLETED

BUILD MUSCLE. STAY LEAN. START TODAY.

Your plan is ready - and your annual discount is already applied.

Start My Plan