How much fatigue and risk of injury does the Apex reduce? Do you have data/metrics to measure those?

Reduced Strain, Fatigue, and Injury Risk

In both laboratory and field testing, the Apex exosuit significantly reduced low back strain and fatigue measured with electromyography (EMG).

For more details and specific numbers please see research papers by Lamers et al. (2018), Lamers et al. (2020), and Yandell et al. (2020). Reducing muscle strain and fatigue reduces the loading on the muscles, the surrounding soft tissues, and the spine itself. This reduces injury risk.