Thu, Aug-22-02, 04:44
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Plan: Zone
Stats: 255/242/230
BF:21%/15%/8%
Progress: 52%
Location: Philly
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Another study (newer)
As you can see in this thread, there are good points and bad points on taking ephedra based products. The best advice is to read the label carefully and follow the directions/warinings.
A recent study by Vukovich and colleagues evaluated the effects of a single dose of ephedrine (20mg) and caffeine (150 mg) on heart rate, blood pressure, and resting energy expenditure on a group of healthy men and women.
The test subjects (8 of them, yes it is a small study) reported to the lab, rested for 15 mins, and underwent 30 minutes of baseline testing.
They were then randomly assigned to either take the EC combination supplement or a placebo.
Heart rate, blood pressure, energy expenditure, and blood fatty acid levels were determined intermittently during the 3 hour observation period.
Results showed that taking the ephedrine/caffeine supplement promoted :
- a greater increase in resting heart rate (+ 23 bpm, versus +9 in the placebo group). This was observed 60 minutes after ingestion.
- an increase in systolic blood pressure (+9, versus +2). This was observed 3 hours after ingestion.
- an increase in resting energy expenditure (+ 10.7%, versus +4.7%). This was observed 3 hours after ingestion.
- No signifigant changes were detected in diastolic blood pressure.
These findings add to the growing body of evidence that supplementing with the EC stack can elevate resting metabolic rate, with mild changes in heart rate and systolic blood pressure.
Vukovich M.D., Heilman C., Brink J. "Caffeine and ephedrine: Effect on resting heart rate, blood pressure, and energy expenditure. Med Sci Sport Exerc 34 (5): S73, 2002.
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