Force control is greater in the upper compared with the lower extremity.

@article{Christou2003ForceCI,
  title={Force control is greater in the upper compared with the lower extremity.},
  author={Evangelos A Christou and Mark Zelent and Les G. Carlton},
  journal={Journal of motor behavior},
  year={2003},
  volume={35 4},
  pages={322-4}
}
The authors investigated whether force control is similar between the upper and lower limbs and between contractions that involve 1 or 2 joints. Six volunteers (27.5 +/- 11.2 years of age) attempted to produce consistent discrete rapid force responses of 30, 60, and 90 N by using 6 different body postures, 3 with the upper and 3 with the lower limb. One of the postures for each limb involved 2 joints. The standard deviation of peak force and impulse (aggregate of the force-time curve) was… CONTINUE READING