Apteekin kofeiini
- Keskustelun aloittaja FAMAZZ
- Aloitettu
10% ALENNUS KOODILLA PAKKOTOISTO
Super-Man
Banned
- Liittynyt
- 17.4.2010
- Viestejä
- 167
Kofeiinitabujen ja muiden kofeiinia sis. valmisteiden teho on hieman parempi kuin kahvin, mutta kahvi taastusti myös "toimii".
"Caffeinated coffee, anhydrous caffeine and endurance exercise
Various methods of caffeine supplementation have been explored and results have provided considerable insight into appropriate form and dosage of the compound. One of the most acknowledged studies, published by Graham et al. [26] demonstrated a range of effects when caffeine (at 4.45 mg/kg) was consumed in varying forms. In their study, aerobically conditioned runners performed five treadmill runs to exhaustion at approximately 85% VO2max after receiving one of the following treatments 60 minutes prior: caffeine capsules plus water, regular coffee, decaffeinated coffee, decaffeinated coffee plus caffeine in capsule form, and placebo. Caffeine in capsule form significantly increased work capacity allowing them to run an additional 2-3 km [26], as compared to the four other treatments.
It was also proposed by Graham and colleagues [26] that perhaps other indistinguishable compounds within coffee rendered caffeine less effective than when consumed in anhydrous form. This suggestion was supported by de Paulis et al. [68] in a 2002 publication which indicated derivatives of chlorogenic acids are produced from the roasting process of coffee. In turn, these derivatives may have the potential for altering the affects of caffeine as an adenosine antagonist, possibly reducing the drug's ability to diminish the inhibitory action of adenosine [68].
As such, McLellan and Bell [27] examined whether a morning cup of coffee just prior to anhydrous caffeine supplementation would have any negative impact on the compound's ergogenic effect. Subjects were physically active and considered to be moderate-to-high daily consumers of caffeine. In a crossover design consisting of six separate testing days, rides to exhaustion were performed at approximately 80% VO2max. Subjects consumed one cup of coffee with a caffeine dosage that was approximately 1.0 mg/kg, and 30 min later ingested either of the following six conditions: decaffeinated coffee + placebo capsules; decaffeinated coffee + caffeine capsules at 5 mg/kg, coffee at 1.1 mg/kg + caffeine capsules at 5 mg/kg, coffee + caffeine capsules at 3 mg/kg, coffee + caffeine capsules at 7 mg/kg, water + caffeine capsules at 5 mg/kg. The results indicated caffeine supplementation significantly increased exercise time to exhaustion regardless of whether caffeine in anhydrous form was consumed after a cup of regular or decaffeinated coffee [27]. Taken together the available research suggests that caffeine supplemented in capsule form in a range of 3 to 7 mg/kg provided an average increase in performance of 24% over placebo [27]. While caffeine supplemented from a cup of coffee might be less effective than when consumed in anhydrous form, coffee consumption prior to anhydrous supplementation does not interfere with the ergogenic effect provided from low to moderate dosages."
http://www.jissn.com/content/7/1/5
"Caffeinated coffee, anhydrous caffeine and endurance exercise
Various methods of caffeine supplementation have been explored and results have provided considerable insight into appropriate form and dosage of the compound. One of the most acknowledged studies, published by Graham et al. [26] demonstrated a range of effects when caffeine (at 4.45 mg/kg) was consumed in varying forms. In their study, aerobically conditioned runners performed five treadmill runs to exhaustion at approximately 85% VO2max after receiving one of the following treatments 60 minutes prior: caffeine capsules plus water, regular coffee, decaffeinated coffee, decaffeinated coffee plus caffeine in capsule form, and placebo. Caffeine in capsule form significantly increased work capacity allowing them to run an additional 2-3 km [26], as compared to the four other treatments.
It was also proposed by Graham and colleagues [26] that perhaps other indistinguishable compounds within coffee rendered caffeine less effective than when consumed in anhydrous form. This suggestion was supported by de Paulis et al. [68] in a 2002 publication which indicated derivatives of chlorogenic acids are produced from the roasting process of coffee. In turn, these derivatives may have the potential for altering the affects of caffeine as an adenosine antagonist, possibly reducing the drug's ability to diminish the inhibitory action of adenosine [68].
As such, McLellan and Bell [27] examined whether a morning cup of coffee just prior to anhydrous caffeine supplementation would have any negative impact on the compound's ergogenic effect. Subjects were physically active and considered to be moderate-to-high daily consumers of caffeine. In a crossover design consisting of six separate testing days, rides to exhaustion were performed at approximately 80% VO2max. Subjects consumed one cup of coffee with a caffeine dosage that was approximately 1.0 mg/kg, and 30 min later ingested either of the following six conditions: decaffeinated coffee + placebo capsules; decaffeinated coffee + caffeine capsules at 5 mg/kg, coffee at 1.1 mg/kg + caffeine capsules at 5 mg/kg, coffee + caffeine capsules at 3 mg/kg, coffee + caffeine capsules at 7 mg/kg, water + caffeine capsules at 5 mg/kg. The results indicated caffeine supplementation significantly increased exercise time to exhaustion regardless of whether caffeine in anhydrous form was consumed after a cup of regular or decaffeinated coffee [27]. Taken together the available research suggests that caffeine supplemented in capsule form in a range of 3 to 7 mg/kg provided an average increase in performance of 24% over placebo [27]. While caffeine supplemented from a cup of coffee might be less effective than when consumed in anhydrous form, coffee consumption prior to anhydrous supplementation does not interfere with the ergogenic effect provided from low to moderate dosages."
http://www.jissn.com/content/7/1/5
