Ight dude here is the thing i totally understand what you are going threw. I to chewed when i was 15 and since i quit u will notice a difference in the gym. Now it might not effect all but some it does.
Nicotine is the main ingredient of concern in smokeless tobacco. It is estimated that a normal, 30-minute dip of smokeless tobacco delivers the same amount of nicotine as 3-4 cigarettes. Nicotine affects the brain and central nervous system and changes neurotransmitters levels regulating mood, learning, alertness, and ability to concentrate.
Nicotine can also increase heart rate, constrict blood vessels and reduce circulation. Nicotine can act like a stimulant or a sedative, and causes the release of endorphins, which provide a tranquilizing effect. Finally, nicotine is considered more addictive than crack or alcohol.
If nicotine wasn't bad enough, there is a cocktail of other harmful chemicals associated with smokeless tobacco including: polonium 210 (nuclear waste), formaldehyde (embalming fluid), and arsenic. According to the American Cancer Society, chewing tobacco users are 50 times more likely than non-users to get cancers of the cheek, gums, and inner surface of the lips
See the part where it says nicotine constricts blood vessels and reduces circulation now that blood of yours needs to get to ya muscles so if u want to feel "DA PUMP" its better to quit it isnt easy but copy and paste this read it everyday if you really love weightlifting cause i do and i wont let anything step in my way and if u truly feel the same you wont either.... | 
