Impact Load is the sum of each intensity created from every impact propagated into the lower limbs.

Impact Load is comparable within and between sessions, allowing you to examine the loading outcomes of specific activities, sessions, and training days - and their respective effects on an athlete’s workload.

As an example, if an athlete took 500 steps at 1g, 1000 steps at 2g and 2000 steps at 3g, the overall Impact Load = (500 x 1g) + (1000 x 2g) + (2000 x 3g) = 8500 (8.5k).

Bone Stimulus is an estimate of the mechanical stimulus that would cause the bone to respond and remodel. It is meant to give an approximation of how much load the tibia will adapt to during a given session. It should not be used as a general workload score nor does it approximate ground reaction forces. It is best employed to track recovery and stress in an athlete recovering from a bone injury.

Impact Asymmetry describes the between-limb difference in mean average impact intensity.

Impact Asymmetry is calculated from the following equation:

where μ = the mean average intensity of impacts that occurred.

Avg. Intensity is the mean average impact intensity derived from every impact propagated into the Left leg or the Right leg.

In the header bar dropdown, Avg. Intensity represents the mean average impact intensity derived from every impact propagated into both limbs, rather than each individual limb.

Avg. Intensity is used to calculate Impact Asymmetry.