New here but I have a strong positive opinion FOR doing cardio twice per day.
Considering the conflicting information that currently out there about which is better, long/slow vs HiiT, fasting or with food, I chose to do both. I do my a.m. cardio, 35+ minutes moderate on empty stomach soon after getting up. Then I do my strength workout, usually with a trainer and I follow either immediately or that evening with 35-45 minutes of HiiT. If nothing else, you're getting your hour of cardio for the day, have some variety to break monotony and if either is better, you're getting it.
My only caveat is that for my morning cardio I don't want to do so much that I lack the energy for my strength session in the afternoon since that's my primary focus for now. I aim for about 6 hours between a.m. cardio and strength. Evening cardio is just whenever and sorta 'balls out' since it's at the end of the day anyway.
I'm trying to lose % body fat and gain muscle at the same time and I've been told that shorter duration cardio is less likely to impair muscle growth than longer sessions.
This seemed like a good answer and has proven to be productive for me in getting towards my goals.
Since March 1st I've gone from about 238 and 24+ %bf down to 209 and about 19% bf, now my weight is going up and body fat still dropping.
Diet is of course crucial and I'm doing about 50% protein, 25% Carbs and 25% fat per day, and I aim for 300 grams protein daily and have to use protein drinks, raw egg whites, etc to accomplish that while keeping my %'s in the general ratios.
I supplement with lots of stuff from B, C, D, E, Omega 3's, DIM, and various other natural herbs and supplements to control Estradiol and prolactin.
Just finished a cycle of 8 weeks on Tren A along with my standard TRT dose of Test Cyp at 1 ml / wk spilt into 2 or 3 injections - again helping control Estradiol. I have Adex but try not to use it because it's a bit strong for my needs.
Sure hope this helps. I've had great success and would love to have others experience the same.