Your Training Max (TM) is the foundation of percentage-based programs like 5/3/1. Unlike your true 1RM, the Training Max is a submaximal weight that allows for sustainable progress and accounts for daily performance variations.
You can either test your actual 1RM, use a recent heavy set to estimate it, or use a weight you're confident you can lift for 2-3 clean reps. If using a rep max, you can estimate your 1RM using this formula: Weight × (1 + Reps/30). For example, 200 lbs × 5 reps estimates to a 233 lb 1RM.
Multiply your 1RM by 0.85 to 0.90. For beginners or when starting a new program, use 85%. More experienced lifters can use 90%. Example: If your 1RM is 300 lbs, your Training Max would be 255-270 lbs. TM based routines in Hardy will do that for you.
Your Training Max should be a weight you can lift for 3-5 strong, fast reps. If you can't hit 5 clean reps at your calculated TM, lower it. It's always better to start too light than too heavy.
Open Hardy, go to your workout screen, and enter your Training Max. The app will automatically calculate all your working weights based on the program's percentages.
At the end of each training cycle (typically 3 weeks), increase your Training Max based on your program's rules. In 5/3/1, this is usually 5 lbs for upper body and 10 lbs for lower body lifts. A well defined routine in Hardy will suggest TM changes for you
Hardy automatically tracks your Training Max and calculates all working weights for you.
Download HardyHow Wendler sets the training max and how it evolves over time.
Context on how 1RM is used in strength programming.