Harald Motz
Level 8 Valued Member
The components of Power are Force (Strength) and Speed.
Strength is the ability of a muscle or the body to exert Force to an external resistance. To move a weight irrespective to the amount of time it takes.
Speed is the amount of time it takes for an object or the own body to cover a certain distance. Strength contributes to speed by enabling the body to overcome inertia and initiate acceleration, the rate at which speed increases. Once movement is initiated strength is required for the continuing rapid transfer that maintains the velocity of the object against its tendency to slow down.
Power is understood best as the ability to exert force rapidly, or strength applied quickly. If a large muscular force is generated that moves a heavy weight very quickly, power production is high; the highest peak power outputs ever recorded in all athletics have been produced during the second pull phase of the snatch.
Comparing Power output of a "deadlifter" (140kg) and a "Power Cleaner"(140kg):
Deadlift
DL 1RM = 300kg, Distance from floor to lockout = 0,65m, Time from floor to lockout = 4.0 sec
Work= 300kg x 9,8m/(sxs) x 0,65m = 1911Nm
Power 1911Nm/4.0sec = 477,5 Watt - Relative Power = 477,5 Watt/140kg = 3,41Watt/kg
Power Clean
Power Clean 1RM = 150kg, Distance from floor to lockout = 1,27m, Time from floor to lockout = 0,6 sec
Work = 150kg x 9,8m/(sxs) x 1,27m = 1866,9Nm
Power = 1866,9Nm/0,6sec = 3111,5 Watt - Relative Power = 3111,5Watt/140kg = 22,2 Watt/kg
The Power Cleaner has 6,5 times the Power output to the deadlifter, although he lifts half amount of weight
The above I collected from "Practical Programming for Strength Training" second edition Rippetoe and Kilgore (p 42 - 45)
I personally find this quite interesting not only for mathematical reasons.
Strength is the ability of a muscle or the body to exert Force to an external resistance. To move a weight irrespective to the amount of time it takes.
Speed is the amount of time it takes for an object or the own body to cover a certain distance. Strength contributes to speed by enabling the body to overcome inertia and initiate acceleration, the rate at which speed increases. Once movement is initiated strength is required for the continuing rapid transfer that maintains the velocity of the object against its tendency to slow down.
Power is understood best as the ability to exert force rapidly, or strength applied quickly. If a large muscular force is generated that moves a heavy weight very quickly, power production is high; the highest peak power outputs ever recorded in all athletics have been produced during the second pull phase of the snatch.
Comparing Power output of a "deadlifter" (140kg) and a "Power Cleaner"(140kg):
Deadlift
DL 1RM = 300kg, Distance from floor to lockout = 0,65m, Time from floor to lockout = 4.0 sec
Work= 300kg x 9,8m/(sxs) x 0,65m = 1911Nm
Power 1911Nm/4.0sec = 477,5 Watt - Relative Power = 477,5 Watt/140kg = 3,41Watt/kg
Power Clean
Power Clean 1RM = 150kg, Distance from floor to lockout = 1,27m, Time from floor to lockout = 0,6 sec
Work = 150kg x 9,8m/(sxs) x 1,27m = 1866,9Nm
Power = 1866,9Nm/0,6sec = 3111,5 Watt - Relative Power = 3111,5Watt/140kg = 22,2 Watt/kg
The Power Cleaner has 6,5 times the Power output to the deadlifter, although he lifts half amount of weight
The above I collected from "Practical Programming for Strength Training" second edition Rippetoe and Kilgore (p 42 - 45)
I personally find this quite interesting not only for mathematical reasons.