Variables in STS

• Variables in STS:

  • STS is influenced by internally and externally generated variations
• Foot placement:

  • Feet 10 cm behind knees may be ideal
  • Decreases movement at hip and knee and may decrease ground reaction forces
• Timing and speed of trunk rotation (flexion):

  • Horizontal momentum facilitates lower limb extension
• Speed of movement:

  • Faster flexion reduces amount of extensor force required
• Seat height:

  • Higher seats require less range of motion and force produced and less translation of centre of mass
• Use of arm rests:

  • Decreases amount of moment required at the knee
• Variables in STS:

  • Foot placement
  • Timing and speed of trunk rotation (flexion)
  • Speed of movement
  • Seat height
  • Use of arm rests