Game Help Stalker 2 - How to sprint in exoskeleton ?

Exoskeletons can be upgraded with the Sprint module at the Technicians Bolero in the Enerhetyk Palace of Culture at Prypiat and Harpy at Yaniv Station.

Also it's important to note that the exoskeleton equipped must be compatible with sprint module.

The Sprint upgrade for the non-variant Exoskeleton cannot be installed directly until you have upgraded it with an Aramid Helmet at the Technician Screw in Rostok. All other Exoskeleton variants can be upgraded directly at Yaniv or Prypiat