One-repetition maximum bench press performance estimated with a new accelerometer method.

Area of Science:

• Sports Science
• Biomechanics
• Exercise Physiology

Background:

• One repetition maximum (1RM) is a standard measure of muscular strength.
• Accurate 1RM prediction is crucial for training program design and performance monitoring.
• Existing prediction methods may require multiple lifts or specialized equipment.

Purpose of the Study:

• To evaluate a novel method for predicting 1RM bench press performance from a single submaximal lift.
• To assess the accuracy of this new method across various submaximal load levels (50-90% of 1RM).

Main Methods:

• Subjects (n=22 active floorball players) performed submaximal bench press lifts at different intensities.
• A 3-axis accelerometer integrated into wrist equipment recorded lift data.
• Maximal acceleration was calculated from sensor data using LabView-based software.
• Estimated 1RM values were compared against traditionally measured 1RM values.

Main Results:

• High correlations (0.89-0.97, p < 0.001) were observed between measured and estimated 1RM.
• Differences between estimated and measured 1RM were minimal (-0.11 to 0.01 kg) and not statistically significant.
• The developed method demonstrated promising prediction accuracy across tested load levels.

Conclusions:

• The novel method provides accurate 1RM bench press predictions using a single submaximal lift and acceleration measurement.
• This approach is a viable and competitive alternative to traditional 1RM testing methods.
• The findings suggest potential for simplified and efficient strength assessment in athletes.