First off, this is how I run clen precontest to drop 10Lbs in 10 days. I am not advising anyone else to do this as it is extreme.
Before my last show I felt I needed to get my body fat down fast and was running out of time. I did this with clen only, as I feel I tend to lose muscle when I add T3, although minimal T3 most likely won't cause muscle loss if AAS are used.
I run clenbuterol only for 10 days in an ascending fashion dose wise everyday. All clen is dosed upon waking on an empty stomach. I think it best to supplement with 3-5 grams of taurine split up throughout the day in 1 gram intervals to avoid cramping as much as possible. I also put salt substitute(potassium chloride) on all meals and even in my protein drinks. I keep calories at 10 per pound of body weight with macros at 40% protein, 40% carbs, and 20% healthy fats from almonds and avocado. I make sure to drink a minimum of 2 gallons of water.
Day#1: 40mcg clen
Day#2: 60mcg clen
Day#3: 80mcg clen
Day#4: 100mcg clen
Day#5: 120mcg clen
Day#6: 140mcg clen
Day#7: 160mcg clen
Day#8: 180mcg clen
Day#9: 200mcg clen
Day#10: 200mcg clen
I actually went higher in those days but it was way dangerous so I'm not posting the true amounts. This is very high dosing and really pushes blood pressure up. I used Vasodilators to open blood pathways. Tadalafil is one vasodilator I used and I was on a prescription vasodilator as well.
I dropped so much fat in those 10 days. I walked on the treadmill for 20 to 30 minutes and did a short weight workout each day with moderate to low intensity to avoid too much stress on the heart. I was quite winded from so much clen. The results were unreal, although you must be aware of the risks involved.