18/03/2016
Todays topic: MENTALITY for RATE OF FORCE DEVELOPMENT (RFD)
the first point I will make is one of my favourite points that is extremely under utilised. If you want to rapidly develop force (POWER - rate of force development (RFD)), Then you must lift with the intent of high velocity (Behm 1993). This is always refuted by 'but if I'm lifting 200kg plus, it won't be fast'? - What we must remember is velocity is relative. Even if the repetition appears slow, if it is the fastest the individual can move the load, then it is the individuals maximum velocity (Vmax) for THAT SPECIFIC LOAD. The other way to look at this is mathematically. POWER is FORCE x VELOCITY (P=FV). So therefore to increase power we can increase velocity, or our force. When we further break down force we find that FORCE = MASS x ACCELERATION (F=MA). Therefore to increase our FORCE which will increase power, we can increase our acceleration, or mass. Therefore a higher load, moved at the same velocity will ALWAYS have a higher power output.
The study i mentioned before (Behm, 1993) also showed that lifting with the intent for velocity INCREASED athletes RFD compared to 'velocity specific movements'. Velocity specific movements are usually performed with lower loads (e.g. squat jumps with 30%1RM).
One major consideration is the lift that this is applied to, and the proficiency of the individual. For example, if this is told to a novice lifter about the deadlift, where the individual is not neurologically efficient at the movement pattern, and attempts to perform this lift at a high velocity, there is obviously a risk for injury.
Questions or comments as always please comment/inbox/email
- Mitch
BhlthSc(Sp&ExSc) AES ESSAM
Accredited Exercise Scientist
Advanced Exercise Solutions