Warfighter Trait: killing an enemy resets your tactical sprint (official, 9 Oct guide).
Warfighter tree, one of its Major Traits: killing an enemy resets your tactical sprint [1]. How Traits are earned: Trait Points and trait trees.
From the evidence
According to player reports, the Adrenaline Burst trait resets tactical sprint upon killing an enemy.
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All DMZ Traits from the Beta Files via @HeyImAlaix 𝗔𝗱𝗿𝗲𝗻𝗮𝗹𝗶𝗻𝗲 𝗕𝘂𝗿𝘀𝘁 Killing an enemy resets tactical sprint. 𝗔𝗶𝗿 𝗦𝘂𝗽𝗲𝗿𝗶𝗼𝗿𝗶𝘁𝘆 SAM sites and UAV towers remain captured for longer. 𝗔𝘂𝘁𝗼 𝗙𝗶𝗹𝗹 Lethals and tacticals automatically replenish from https://t.co/sBYSA8g0W3

💥 ALL RUMORED DMZ TRAITS - via @HeyImAlaix 💥 𝗔𝗱𝗿𝗲𝗻𝗮𝗹𝗶𝗻𝗲 𝗕𝘂𝗿𝘀𝘁 Killing an enemy resets tactical sprint. 𝗔𝗶𝗿 𝗦𝘂𝗽𝗲𝗿𝗶𝗼𝗿𝗶𝘁𝘆 SAM sites and UAV towers remain captured for longer. 𝗔𝘂𝘁𝗼 𝗙𝗶𝗹𝗹 Lethals and tacticals automatically replenish from the https://t.co/BXZJ5A8mRU

Sources
- [1]Activision blog, DMZ Deep Dive Part 2: How to Play, the FOB guide (9 Oct 2026) · callofduty.com · read 9 Oct 2026