The hormones of fasted workouts
Working out fasted for better results

As far as getting dizziness and weakness, sounds like low blood sugar issues. Which means either your muscle glycogen stores are low in the first place, your liver glycogen stores are low or your workout is too intense/long for you to maintain (esp with the combination of the other 2 issues mentioned before). Solutions include allowing more glycogen replenishment to muscles (somehow adding in more carbs once in a while, aka carb loading), adding more fruit the day before (help restore/replenish liver glycogen), shorter or less intense workouts fasted. The best workouts fasted for fat loss are usually short/interval style (10-15min max) with additional slow movement to continue the “fat burning”. Trying to do a 45 min workout fasted with heavy lifting will probably “bonk” most people. Just change something up and see what happens….remember you are always in control of what you can try (and what you can learn from it).

You mention “low carb” eating. What percentage of someone’s daily calories should be coming from carbs/fat/protein? Understanding that the carbs should be veggies and not processed sugars. Also understanding that there should be a balance of all three in each meal percentage-wise. This is geared toward weight loss not weight gain. I’m 167 lbs I’m averageing between 1000 and 1200 calories, light activity, plan to step it up to 30/intense 3 days a week. I was highly successful on a nocarb diet for weight loss with no exercise! It wasn’t healthy. Our bodies need all three components I read that the new show DIETTRIBE is on 1500 calories 50%protein 30%carb 20%fat. 30 pounds in 90 days and they are all over 200 pounds.