Science-Backed RIR Training: Build More Muscle, Smarter
Your smart guide to RIR and training closer to failure for more muscle and better gains.
Dr. Carl Juneau, PhD
A University of Montréal, London, and Harvard alum, Dr. Juneau is a former trainer for the Canadian Forces with a PhD in Public Health/Epidemiology.
Wrote 511 posts
Better exercise videos
Full release notes (iOS version 3.2509.0126 / Android 2051090125) * Improved: Exercise videos for Goblet Squat and Bulgarian Split Squat * Fixed: Workout already completed on open * Fixed: Two upper- or lower-body workouts in a row in rare cases * Fixed: 2 g of protein in meal plan in a rare
Exciting news: Major Android app update!
We’re thrilled to announce a huge update to our Android app, bringing it fully up-to-date with all the enhancements introduced on iOS over the past 10 months! Thank you for your patience during this extensive testing cycle—it’s important to us that everyone enjoys the very
Rest-Pause, Drop Sets, and Back-off Sets
✨ New * Comprehensive Sets System - Accurate workout generation for all training styles including Rest-Pause, Drop Sets, and Back-off Sets * Cross-Browser Compatibility - Full support for Chrome Android, Safari iOS, and Firefox Mobile * User Settings Cache - Centralized caching system for faster app performance 🚀 Improvements * 30% faster load times - Reduced API
Interface Revamp
✨ New * RIR (Reps in Reserve) Picker - Easily track your effort level after completing your first work set * Set Type Explainer - Understand different exercise types with helpful modal explanations and tags * Version Display - Check your app version (e.g. v0.2025.08.09) directly from the user menu 🚀 Improvements * Rest Timer
Top 10 Best Natural Bodybuilders of All Time
Explore the top 10 natural bodybuilders of all time, their training secrets, and the principles that define drug-free bodybuilding success.
Fixed: Cannot create custom program
Full release notes (version 3.2508.0420) * Fixed: Cannot create custom program/workout * Fixed: Subscription not recognized in rare cases * Fixed: 5 crashes in rare cases Coming soon * Apple Watch app
Home Workout—No Equipment App Bodybuilding Review 2025
Is This 100M+ Download App Worth It for Building Muscle?
Adjustable rest timer
✨ New * Unified "Today's Sets" view - All your completed and upcoming sets in one place for easier workout tracking * Decimal precision for 1RM - Track your strength gains with more granular detail * Adjustable rest timer - Change rest duration on the fly with immediate effect 🚀 Improvements * 30% larger explainer
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Meet Dr. Muscle X: The Future of AI Personal Training. Early Preview Now Open.