The old way of sending PDF workouts was like shouting into the void. I had no idea if clients were doing the work or seeing results. My Crust AI workout app changed everything. Engagement and accountability have skyrocketed, and my clients are progressing faster than ever because the feedback loop is finally closed.

Marco R.
Founder
,
Apex Performance Coaching
The Problem
Marco R., the founder of the online fitness company Apex Performance Coaching, is an expert at designing effective workout programs. His challenge wasn't in the programming, but in the delivery and tracking. He was sending clients beautifully designed, comprehensive workout plans as static PDF files. While informative, they were completely unengaging.
"A PDF is a dead end," Marco explains. "Clients would lose it in their email, forget to track their weights, or feel intimidated and not know how to perform an exercise correctly. I had zero visibility into their actual performance. Was the weight too heavy? Did they skip a day? I was coaching blind, and it was limiting my clients' progress and my ability to scale my business."
The Solution
Marco used Crust AI to replace his static PDFs with a dynamic, interactive "Daily Workout" Snippet for each of his clients. The new system is powered by his master workout schedule in Notion and has turned a one-way information push into a two-way coaching partnership.
Now, each client has their own personal Apex Hub. Every day, the hub automatically displays their assigned workout, creating a focused, easy-to-follow plan:
Embedded Video Demos: Next to each exercise, there's a video demonstration showing proper form, eliminating guesswork and reducing the risk of injury.
Effortless Progress Logging: As they complete each set, clients enter the weight they lifted and the reps they achieved directly into simple input boxes within the app.
A Sense of Accomplishment: After the final exercise, they hit a large "Workout Complete" button, which logs the session and updates their trainer's dashboard.
From his own master dashboard—another Snippet—Marco can now see in real-time who has completed their workouts, review the specific weights and reps they logged, and make data-driven adjustments to their future programming. The entire check-in and feedback process is now automated.
The Impact
The interactive workout app has fundamentally changed Marco's business, leading to better client results and significant business growth.
"Client accountability and engagement went through the roof almost immediately," Marco says. "They're more consistent because the process is fun and easy. They know I'm seeing their data, which motivates them to push harder."
The business results have been transformative:
Scaled His Client Load by 30%: By automating the check-in and data collection process, Marco can now provide high-quality, personalized coaching to more clients without increasing his administrative hours.
Higher Client Retention: Clients are seeing better, faster results because of the improved tracking and data-driven adjustments. This leads to higher satisfaction and longer-term commitment.
A Premium, Modern Service: The custom app elevated his service from simply selling plans to offering a true, interactive coaching experience, allowing him to stand out in a competitive market.
How Can You Replicate?
This interactive coaching model can be applied to any field, from fitness and nutrition to music lessons and business coaching.
Organize Your Plans: Use a database like Notion or Airtable to plan your client programs. Have a table for
Clients
, one forExercises
(including a column for YouTube demo links), and aSchedule
table that assigns exercises to clients on specific dates.Use a "Single Item Snippet": Each client gets their own snippet. The snippet is configured to dynamically display the workout records scheduled for the current date for that specific client.
Enable Write-Access and Permissions: The snippet needs write-access to the fields where clients log their data (e.g.,
Weight
,Reps
,Status
). Use "User-based Permission" on the client's email to ensure the hub is private and secure.Create an Interactive UI with AI: Use Crust AI's prompts to build the app-like interface. This is where you can add features that are difficult to create on other platforms:
"For each exercise, embed the YouTube link from the 'Demo Video' field directly into the page as a playable video."
"Next to each exercise title, create small, numeric input boxes for 'Weight' and 'Reps'."
"Add a large button at the bottom that says 'Mark Workout as Complete'. When clicked, this should update the 'Status' field in my database to 'Done'."