What it is
Strength Index is a strength tracking view that summarizes your best estimated 1RM across exercises for a selected period.
Strength Index
The WeightUp Strength Index: True Relative Strength
A smart, multi-exercise aggregate of your peak performance. Strength Index helps you see the big picture beyond individual personal bests.
1RM EquivalentMulti-period supportPro analytics
01Overview
What is the WeightUp Strength Index?
Strength Index rolls up your top estimated 1RM per exercise into a single number for the selected period. It updates with your recent training instead of carrying lifetime peaks forward, giving you a real-time pulse on your current capability.
- Estimated 1RM uses a blended formula based on reps and weight
- Line chart reflects rises, plateaus, and dips based on recent performance
- Automatically filters and keeps only the best 1RM per exercise in each bucket
- Fully adaptable to LB or KG based on your preference
Strength
Across all logged exercises
+236.9%
02Methodology
Raw Numbers vs. Pound-for-Pound Power
Our algorithm processes every set you log to keep your strength metric consistent and easy to read.
1
Grouping
Workouts are bucketed into time intervals based on your selected range.
2
Estimation
Every set receives an estimated 1RM using our hybrid Rep-Max formulas.
3
Filtering
We identify and keep only the single best 1RM for each unique exercise.
4
Aggregation
Exercise maxima are summed to produce your final Strength Index.
03Insights
Benchmark Your SBD (Squat, Bench, Deadlift)
Understand your growth relative to your baseline. We use a moving average to compare your current performance against prior periods.
AvailabilityWeek and month views are available to everyone. 3 months, 6 months, and year views require aWeightUp Pro subscription.
Feature Snapshot
Key facts
Strength Index sums your best estimated 1RM per exercise in a selected period.
Estimated 1RM is calculated from weight and reps in each logged set.
Only the top set per exercise is kept for each time bucket.
Week and month views are available for all users.
Longer views such as 3, 6, and 12 months require Pro.
Charts update as you log new workouts.
Supports lb and kg units.
Quick Answers
WeightUp at a glance
Who it is for
- Lifters who want a single strength log across multiple exercises.
- Athletes comparing strength change across weeks or months.
- Anyone who wants estimated 1RM trends without manual math.
How it works
- Each set gets an estimated 1RM based on reps and weight.
- The top 1RM per exercise is kept for each period.
- Those best sets are summed into one strength index value.
Frequently Asked Questions
Explore More
Related features
Jump to our other core tools to get a full picture of how WeightUp helps you optimize your mesocycle.
Review your strength trends in seconds
Open WeightUp to see how your strength is moving across weeks, months, or the entire year.