A man is bent over theta 45 degree to pick up a weight w Fi

A man is bent over (theta = 45 degree) to pick up a weight w (Figure 1). Determine the compressive load (J) in the sacral vertebral joint. The posterior muscle forces have been separated into two primary groups the shallow latissimus dorsi (F_L) and the erector spinae (F_E) muscles. Perpendicular distances to each force are given. Find optimized solutions to this statically indeterminate problem using Total muscle force Total muscle stress. Maximum muscle force Maximum muscle stress Total muscle energy Assume A_L = 5 cm and A_E = 10 cm^2 For each case, show a 3D plot of the cost function and solution curves in the muscle force/stress space.

Solution

B. maximum muscle force - The force generated just by a muscle depends on the cross-bridges attached. Because it takes take a finite amount of the time for cross-bridges to require, mainly because slide past one another faster and faster force decreases due to the lower number of cross-bridges attached Muscular areas really are strengthened in accordance with the force placed across the muscle.