By American College of Sports Medicine, Nicholas Ratamess Jr. PhD CSCS*D FNSCA
Read or Download ACSM's Foundations of Strength Training and Conditioning PDF
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Extra info for ACSM's Foundations of Strength Training and Conditioning
As cross-bridge cycling rate increases, less cross-bridges remain intact at any given time. However, cross-bridge formation is enhanced at slow velocities and during ISOM actions where the cross-bridge cycling rate is low. The result is greater force production. On the contrary, muscle force increases as velocity increases during ECC actions. Loading greater than the peak ISOM force level causes muscle fibers to lengthen. Additional loading increases the lengthening velocity. Thus, muscle force increases as lengthening velocity increases because the fibers are contracting as they are lengthening and greater force is present during ECC actions.
12. Ground-reaction force curves. Data demonstrate increased ground reaction forces with increasing speeds of running and walking. Ground-reaction force curve shows two distinct segments (the curves are more visible during running). The first rise in force (or peak) is known as the peak impact force, which depicts force produced upon the foot landing on the ground. The second rise (or peak) is known as the peak propulsion force, which is the peak force produced during acceleration as the individual’s center of gravity moves forward during pushoff.
A comparison of strength and power characteristics between power lifters, Olympic lifters, and sprinters. J Strength Cond Res. 1999;13:58–66. 15. National Strength and Conditioning Association. Strength and Conditioning Professional Standards and Guidelines. Colorado Springs (CO): NSCA; 2009. 16. Sale DG, MacDougall JD. Isokinetic strength in weight-trainers. Eur J Appl Physiol Occup Physiol. 1984;53:128–132. 21 17. Sierer SP, Battaglini CL, Mihalik JP, Shields EW, Tomasini NT. The National Football League combine: performance differences between drafted and nondrafted players entering the 2004 and 2005 drafts.