GFR	Garmin Forerunner 735XT
IMU	inertial motion units
N	Newton
kN	kilonewton
N-pose	Neutral standing calibration
PE	prediction error; $\sqrt{{\left[observed-predicted\right]}^2}$
PPE	Proportion of prediction error; $\frac{absolute acccuracy \left(N\right)}{mean structure specific \left(N\right)}100$
Eq	equation
SL	Stride length
Sp	Speed
Cad	Cadence
BH	Body height
BW	Bodyweight
KH	Knee height
AH	Ankle height
SSH	Shoe sole height