Velocity Based Training Power Calculator
Track your velocity based training power with our free sports calculator. Get personalized stats, rankings, and performance comparisons.
Reviewed by Sher, Sports Science & Nutrition Specialist
Formula
Power = Force x Velocity = (Mass x 9.81) x MCV
Power is in watts, Force = mass x 9.81 m/s^2, MCV is mean concentric velocity in m/s.
Worked Examples
Example 1: Back Squat Power
Problem:85 kg athlete squats 120 kg at 0.65 m/s over 0.55 m.
Solution:Force = 120x9.81 = 1177.2 N\nPower = 1177.2x0.65 = 765.2 W\nWork = 1177.2x0.55 = 647.5 J\nPower/BW = 765.2/85 = 9.0 W/kg\nEst 1RM = 120/0.70 = 171.4 kg
Result:Power: 765.2 W | Zone: Accelerative Strength
Example 2: Bench Speed Work
Problem:90 kg athlete benches 80 kg at 0.95 m/s over 0.40 m.
Solution:Force = 80x9.81 = 784.8 N\nPower = 784.8x0.95 = 745.6 W\nWork = 784.8x0.40 = 313.9 J\nPower/BW = 745.6/90 = 8.3 W/kg\nEst 1RM = 80/0.55 = 145.5 kg
Result:Power: 745.6 W | Zone: Speed-Strength
Frequently Asked Questions
How is power calculated from velocity and load?
Power in VBT is calculated using the physics formula Power equals Force times Velocity. Since Force equals mass times gravity (F = m x 9.81 for vertical movements), the complete equation is Power = Load x 9.81 x Mean Concentric Velocity. For example, moving 100 kg at 0.75 m/s produces 100 x 9.81 x 0.75 = 735.8 watts of mean power. Peak power is typically 10 to 20 percent higher than mean power and occurs at a specific point during the lift. Power output is maximized at moderate loads, typically around 30 to 60 percent of 1RM for ballistic movements and 50 to 70 percent for traditional exercises.
What are the VBT training zones and their applications?
VBT training zones are defined by mean concentric velocity ranges. Starting Strength (above 1.3 m/s) develops speed with very light loads. Speed-Strength (1.0 to 1.3 m/s) develops power with moderate loads. Strength-Speed (0.75 to 1.0 m/s) builds explosive strength. Accelerative Strength (0.5 to 0.75 m/s) develops maximal strength with heavy loads. Absolute Strength (0.25 to 0.5 m/s) involves near-maximal efforts. Each zone produces specific neuromuscular adaptations, and a well-designed program typically includes training across multiple zones within a week or training block for comprehensive development.
How can I estimate my one-rep max from velocity data?
The load-velocity relationship is remarkably linear for most individuals, allowing 1RM estimation from submaximal sets. By establishing your personal load-velocity profile, you can extrapolate to find the load at which velocity would reach your minimum velocity threshold, typically 0.15 to 0.20 m/s. Generic tables suggest 0.75 m/s corresponds to roughly 65 percent of 1RM and 0.30 m/s to roughly 90 percent. Using the formula Estimated 1RM = Current Load divided by (Estimated Percentage / 100), you can estimate your daily max. This method accounts for daily readiness fluctuations better than using a fixed percentage from a previous test.
What devices are used to measure barbell velocity?
Several categories of devices measure barbell velocity with varying accuracy and cost. Linear position transducers like GymAware and Tendo attach a cable to the barbell and measure displacement over time, offering high accuracy. Accelerometer devices like the PUSH Band attach directly to the barbell and measure acceleration to calculate velocity. Camera-based systems like RepOne use optical tracking. Smartphone apps using the camera or accelerometer provide a budget-friendly option with moderate accuracy. For serious athletes and coaches, linear position transducers remain the gold standard for velocity measurement accuracy with reliability within plus or minus 2 percent.
References
Reviewed by Sher, Sports Science & Nutrition Specialist · Editorial policy