Use the Equation 'Moment = Force (Mass of Limb X

Short Answer

Use the equation 'Moment = force (Mass of limb x acceleration due to gravity) × perpendicular distance from axis of rotation' to calculate the moment about the OX axis for the hand when:
0.006 = the percentage of mass of the whole body for this segment expressed as a decimal (i.e., a proportion of 1.0 or 0.6%)
82 = athlete's mass in kilograms (kg)
9.81 = acceleration due to gravity expressed in m/s²
1.40 = perpendicular distance from OX which is 140 cm to be expressed in meters (m) along Y