All my life I have been a heavy cola drinker. Everyday I would have at least 4 *and sometimes up to 8* 16oz colas a day. Sometimes regular but mostly diet drinks.
Monday I quit all caffeine drinks cold turkey and cut down my artificial sweetner drinks to 2 per day max * 1 Sprite zero and 1 glass of sugar free Kool Aid*. I am still having withdrawl but think I can fight it out. Headaches are damn bad though.
Also I have had a hard time hittnig LTHR on the indoor trainer but since qutting caffeine drinks Monday *Tuesdays workout as first test* not only can I hit LTHR my HR is recovering faster and at a much lower BPM. Example.... My LTHR is 185. When I do a 20 minute interval on the trainer I can now get my HR up to 185 and hold it there for the entire interval. About a minute after this interval my HR used to drop to the 125BPM range but now its around 105-110 BPM! My guess is my on the road LTHR must be higher than 185 now that im off caffeine. Need a little warmer weather so i can get a real test in.
Just food for thought for all the caffeine users out there. There might be some huge gains if you quit.