It has 2 effects, one which is the standard version of the perk Marathon from multiplayer, which gives the player twice the amount of sprint endurance. The other effect is similar to the perk Lightweight from multiplayer, but instead of the 7% speed increase from Lightweight, Stamin-Up makes the player's weapon lighter, allowing them to sprint at the same speed as they would with a lighter weapon such as a Pistol or the Ballistic Knife with a heavy weapon such as an HK21 or RPK.
The reason I posted this was to point out that if you are going to take a quote from a book about a city and they are specifically talked about that city, PLEASE USE A PICTURE OF THE SAID CITY!!!! This quote is describing when they exit the Fort Pitt Tunnel...why would they use a picture of New York (?) or wherever!!! (-Perks of Being a Wallflower)
More sticks! Consultants rave about the use of the perk stick to prevent migraines! Put it on when you feel a headache starting for best results. Also, use the immunator for seasonal allergies or to prevent the flu in winter. Https://TaraGodoy.po.sh
Just one of the perks of being an agent.... Discounted Agent trips!!! This is real!