Isometric Mid-Thigh Pull Strength Calculator
Estimate your one-repetition maximum (1RM) for the deadlift based on your isometric mid-thigh pull (IMTP) peak force. This tool is designed for athletes and fitness enthusiasts to gauge strength.
Enter Your Peak Force
Estimated 1RM Deadlift
180.0 kg
396.8 lbs
Understanding the Isometric Mid-Thigh Pull (IMTP)
The Isometric Mid-Thigh Pull (IMTP) is a widely used test in sports science to measure an athlete's maximal force production capabilities. It involves pulling on a fixed bar at mid-thigh height, exerting maximum force for a short period (typically 3-5 seconds). Since the bar doesn't move, the contraction is "isometric."
The peak force generated during this test has been shown to have a strong correlation with dynamic strength performance, particularly in exercises like the deadlift and squat, as well as with athletic abilities like jumping and sprinting. This makes the IMTP a safe and effective way to assess and monitor an athlete's strength without the risks associated with maximal dynamic lifting.
How is the 1RM Estimated?
The formula used in this calculator (Estimated 1RM = Peak Force x 1.2) is based on scientific literature that has established a predictive relationship between IMTP peak force and deadlift 1RM. The multiplier (in this case, 1.2) is a regression coefficient derived from studies comparing large groups of athletes' IMTP and deadlift results.
It's important to note that this is an estimation. The exact ratio can vary based on individual factors like technique, limb lengths, and training history. However, it provides a valuable, evidence-based benchmark for tracking strength progress over time.
Testing Protocol for Accurate Results:
- Warm-up thoroughly before performing the test.
- Stand on a force plate or use a load cell with a barbell fixed in a power rack.
- Adopt a deadlift-like posture with the bar at mid-thigh level.
- Pull upwards on the bar as hard and as fast as possible for 3-5 seconds.
- Ensure your torso remains rigid and there is no jerking motion.
- Perform 2-3 trials and use the highest peak force reading for this calculator.
Disclaimer: This tool is for informational and educational purposes only. Consult with a qualified strength and conditioning coach or sports scientist for accurate strength assessment and programming.