if work capacity—particularly aerobic—is a high priority for you, you’d do well to shop for a different diet drug . Clocking more cardio hours each week than strength training time? For starters, it stands to assume than any drug that can potentially exert significantly deleterious effects on the human heart isn’t prime weight-loss material for anybody needing iron aortas and slow, steady cardiac contractions to get them through high cardio training... Additionally, animal studies indicate that clenbuterol administration decreases muscle oxidative potential and expenditure efficiency, perhaps by preferentially increasing nonmitochondrial proteins &/or altering fiber-content . Reductions in cardiac capacity and structure, as well as VO2max, seem to be implicated. And although in some studies consistent exercise training has been able to counteract some of clen’s performance-reducing effects, the general scientific consensus remains that chronic clenbuterol treatment is directly antagonistic to exercise performance.. In non-asthmatic humans, there is very little to indicate that beta-agonist drugs will improve anaerobic or aerobic work capacity.
So at low doses, you are at best breaking even. At high-doses, it is far more likely that your performance will be hampered and/or harmed through marked increases in systolic blood-pressure and impairment of the anaerobic expenditure process. This would hold particularly true in regards to activities like HIIT cardio and intensive, low-rest interval weight training.
Albuterol is a much better choice...