Should we train movements or muscles?
providing useful and insightful science based training material
Peak Velocity can be used to determine whether an olympic lift is missed due to bar height or technical error. However, you first have to understand what peak velocity is.
Peak velocity is a specific point in the movement at which velocity of the measured object (center of mass, barbell, projectile…) is at its highest. Depending on the type of movement being performed, peak velocity will occur at different regions within the movement.
Potential energy is the possible energy an object has based on its position.
Formula
Potential Energy (PE) = Mass * Gravity * Height
Continue reading “Physics (Potential Energy and Kinetic Energy)”
Jerk is acceleration/time, which makes the units of jerk distance / time to the 3rd (Distance/time/time/time)
Jerk = acceleration/time
Velocity is the change in distance over the time it takes to for the change in distance to occur. For example if I were to start running from stationary position (Initial Distance ‘Di’) and run 40 yards (Final Distance ‘Df’) in 4.4 seconds my average velocity for the entire run would be the change in distance (40yards) divided by the time it took to travel that distance (4.4 seconds).
Impulse is a very important equation to understand for optimization of performance. The equation itself is derived from the Force equation (F = MA)
The steps to get the impulse equation are as follows:
Force
Force is the product of mass and acceleration.
Force = mass * acceleration
Force is a vector quality, meaning it has both magnitude (how much force) and direction (which way the force is going).
Force = mass * acceleration
Before we can dive into the “how to” and the “when to”, it is probably wise to first discuss the “what is” and “why to”, of velocity based training.
Absolute force, also know as absolute strength, is the most amount of force one can produce with no limit to the amount of time required to produce the force. Highest levels of absolute force can only be reached during an isometric or eccentric contraction. However, because an isometric contraction requires no lengthening or shortening of the muscle fibers(actually extremely minuet changes in length) and no movement of the limb it is not very practical to use (hard to quantify) and neither is eccentric maximal force due to the supra-maximal requirements (again, hard to measure). Instead, in this article absolute force will be synonymous with maximal concentric force. Absolute force can be measured by using a one-rep max. In such a case, the limiting factor in completion of movement will be the concentric force of a movement, not a single muscle group.
Continue reading “Absolute Force and Rate of Force Development”