Understanding the Force-Velocity Curve | Atlas HPC Limerick
In athletic development, the ability to produce high levels of power is the primary differentiator between average and elite performance. To optimise power output, coaches and sports scientists rely on a foundational biomechanical concept: the Force-Velocity Curve.
Understanding this inverse relationship allows us to move away from generalised programming and implement targeted, objective training interventions based on an athlete's specific physiological deficit.
Understanding this inverse relationship allows us to move away from generalised programming and implement targeted, objective training interventions based on an athlete's specific physiological deficit.
The Biomechanics of the Curve
Power is the product of force and velocity, expressed mathematically as P = Force X Velocity. The Force-Velocity curve illustrates the inverse relationship between the amount of force a muscle can produce and the speed of the contraction. When external resistance is high (e.g., a maximal back squat), velocity is inherently low.
When external resistance is minimal (e.g., unweighted sprinting), contraction velocity is high, but the external force produced is low. Peak power output typically occurs in the middle of this curve, where both force and velocity are optimised. However, to shift the entire curve to the right - making an athlete both stronger and faster - practitioners must train across specific zones.
Power is the product of force and velocity, expressed mathematically as P = Force X Velocity. The Force-Velocity curve illustrates the inverse relationship between the amount of force a muscle can produce and the speed of the contraction. When external resistance is high (e.g., a maximal back squat), velocity is inherently low.
When external resistance is minimal (e.g., unweighted sprinting), contraction velocity is high, but the external force produced is low. Peak power output typically occurs in the middle of this curve, where both force and velocity are optimised. However, to shift the entire curve to the right - making an athlete both stronger and faster - practitioners must train across specific zones.
The 5 Zones of the Force-Velocity Curve
Based on the current sports science literature, training is generally categorised into five distinct zones, often dictated by a percentage of an athlete's One-Repetition Maximum (1RM):
Maximal Strength (>85% 1RM): The objective is maximum force generation. Velocity is low. Exercises include heavy bilateral lifts like squats and trap bar deadlifts.
Strength-Speed (60-85% 1RM): Moving relatively heavy loads as fast as possible. The emphasis is still on force, but with an intent to move quickly. Olympic weightlifting derivatives often sit here.
Peak Power (30-80% 1RM): The optimal balance of force and velocity. Exercises include loaded jump squats and heavy medicine ball throws.
Speed-Strength (30-60% 1RM): The primary focus is speed, with minimal resistance added to increase force requirements. Examples include band-accelerated jumps or light resisted sprints.
Maximal Velocity (<30% 1RM): Near-unresisted movement focusing on central nervous system firing rates and top-end speed, such as 10m to 30m maximal sprints.
Based on the current sports science literature, training is generally categorised into five distinct zones, often dictated by a percentage of an athlete's One-Repetition Maximum (1RM):
Maximal Strength (>85% 1RM): The objective is maximum force generation. Velocity is low. Exercises include heavy bilateral lifts like squats and trap bar deadlifts.
Strength-Speed (60-85% 1RM): Moving relatively heavy loads as fast as possible. The emphasis is still on force, but with an intent to move quickly. Olympic weightlifting derivatives often sit here.
Peak Power (30-80% 1RM): The optimal balance of force and velocity. Exercises include loaded jump squats and heavy medicine ball throws.
Speed-Strength (30-60% 1RM): The primary focus is speed, with minimal resistance added to increase force requirements. Examples include band-accelerated jumps or light resisted sprints.
Maximal Velocity (<30% 1RM): Near-unresisted movement focusing on central nervous system firing rates and top-end speed, such as 10m to 30m maximal sprints.
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Athletic Profiling & Velocity-Based Training (VBT)
Most athletes naturally present with a deficit - they are either heavily force-dominant (strong but slow) or velocity-dominant (fast but lacking absolute strength). Training the wrong end of the curve yields diminishing returns.
To identify these deficits and ensure athletes are training in the correct physiological zone, Atlas High Performance Centre utilises objective data collection and Velocity-Based Training (VBT).
Output Sports Integration: Using Output Sports sensors, we track real-time bar velocity and jump metrics. This allows us to auto-regulate loads based on daily readiness and ensure an athlete is actually hitting the required metrics for Strength-Speed or Speed-Strength, rather than guessing based on subjective 1RM percentages.
VALD Force Plates: We assess ground reaction forces (GRF), rate of force development (RFD), and bilateral asymmetries during jumping and landing phases.
SmartSpeed Timing Gates: Laser timing provides highly reliable data on 10m acceleration capabilities.
Most athletes naturally present with a deficit - they are either heavily force-dominant (strong but slow) or velocity-dominant (fast but lacking absolute strength). Training the wrong end of the curve yields diminishing returns.
To identify these deficits and ensure athletes are training in the correct physiological zone, Atlas High Performance Centre utilises objective data collection and Velocity-Based Training (VBT).
Output Sports Integration: Using Output Sports sensors, we track real-time bar velocity and jump metrics. This allows us to auto-regulate loads based on daily readiness and ensure an athlete is actually hitting the required metrics for Strength-Speed or Speed-Strength, rather than guessing based on subjective 1RM percentages.
VALD Force Plates: We assess ground reaction forces (GRF), rate of force development (RFD), and bilateral asymmetries during jumping and landing phases.
SmartSpeed Timing Gates: Laser timing provides highly reliable data on 10m acceleration capabilities.
Objective Performance Assessments
Effective athletic development requires removing the guesswork. By conducting a comprehensive Force-Velocity profile, we can prescribe precise interventions to target an athlete's specific neuromuscular deficit.
To establish your baseline metrics and build an evidence-based training program, you can book a comprehensive 1-to-1 Performance Assessment at our Limerick facility.
👉 Book Your €149 Performance Assessment via LegitFit
Effective athletic development requires removing the guesswork. By conducting a comprehensive Force-Velocity profile, we can prescribe precise interventions to target an athlete's specific neuromuscular deficit.
To establish your baseline metrics and build an evidence-based training program, you can book a comprehensive 1-to-1 Performance Assessment at our Limerick facility.
👉 Book Your €149 Performance Assessment via LegitFit
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