1. What is Strength Index?

The Strength Index is a simple ratio that compares the weight you can lift to your body weight. It provides a standardized way to measure strength relative to body size, allowing for fair comparisons between individuals of different weights.

2. How Does the Calculator Work?

The calculator uses the Strength Index formula:

Where:

• Lift Weight — The weight you can lift in kilograms
• Body Weight — Your body weight in kilograms

Explanation: The formula calculates how many times your body weight you can lift, providing a dimensionless ratio that represents your relative strength.

3. Importance of Strength Index

Details: The Strength Index is particularly useful in sports and fitness to compare strength across different weight classes. It helps athletes set realistic goals and track progress independent of body weight changes.

4. Using the Calculator

Tips: Enter both lift weight and body weight in kilograms. For accurate results, measure your maximum lift capacity for a specific exercise (e.g., bench press, squat).

5. Frequently Asked Questions (FAQ)

Q1: What is a good Strength Index value?
A: This varies by exercise and training level. For bench press, 0.5-0.7 is beginner, 0.8-1.0 intermediate, and 1.1+ advanced.

Q2: Should I use 1RM or training weight?
A: For most accurate assessment, use your one-repetition maximum (1RM) weight.

Q3: How does this compare to Wilks score?
A: Wilks score is more complex and accounts for gender, while Strength Index is simpler and exercise-specific.

Q4: Can I use pounds instead of kilograms?
A: The calculator requires kg, but you can convert pounds to kg by dividing by 2.205.

Q5: Does this apply to bodyweight exercises?
A: For exercises like pull-ups, the index would be >1 since you're lifting your full body weight.