9/26/19:
Life Fitness Strength 1:1, 1:2, 1:4 Mechanical Advantage explained where pulleys reduce the amount of suspension cables, creating the pulley ratio:
1:1 = Requires 100kg of force
1:2 = Requires 50kg of force
1:4 = Requires 25kg of force
1:2 = Requires 50kg of force
1:4 = Requires 25kg of force