Passed out at gym today

It has nothing to do with sleep. You out exercise your intake. You are taking in literally NO calories. Of course you're losing weight, you're STARVING.

Side effects of Starvation:

Starvation: Starvation can have very serious effects on all major body systems and organs. The basic metabolic response to starvation is to conserve body tissues and energy. However, the body will also start to use its own tissue, including muscle and organs, for energy since the body has no food to use instead, The liver and intestines typically lose the highest percentage of their own weight during starvation, followed by the heart and kidneys which both lose a moderate amount of weight. This often causes permanent damage to the organs in the process. Because someone's heart size may be reduced, they will experience low blood pressure and a slowed pulse. It cans also lead to cardiac arrest or kidney failure. Total starvation is usually fatal in 8 to 12 weeks.

Dehydration: the healthy functioning of cells and tissues is dependent upon a certain level of water content in the body. Also, salt and other minerals need to be kept within a narrow range. In a person who has become dehydrated, it's possible they are suffering from a depletion in salt as well as water. Long-term dehydration can
ultimately lead to kidney failure.

Muscle and cartilage: Over-exercise can put a huge strain on muscles and cartilage, particularly if the exercise is concentrated on one area for long periods of time.

Bones: Osteoporosis is a loss of protein matrix tissue (density) from bones, leaving them brittle and susceptible to fracture. Although it is a natural part of the aging process, the chances of developing osteoporosis later in life are significantly increased for anorectics, due to hormone changes. Bones may also stop growing, which causes stunted growth in younger anorectics.

Irregular or abnormally slow heart rate: An irregular or slow heart rate can mean that the heart muscle is undergoing changes. This is likely to lead to low blood pressure and, the lower blood pressure and heart rate goes, the greater the risk of heart failure.

Heart failure: The heart muscle is extremely sensitive and can become thin and flabby from nutritional deficiency. A lack of calories and protein can have a negative effect on the heart, and body chemical may become so imbalanced that heart failure occurs.

Sexual function: the body does not have enough fat to produce oestrogen in females, which will cause amenorrhea (cessation of periods) and infertility, and testosterone in men, resulting in low sex drive.

Lanugo growth: lanugo (fine hair) grows all over the body to keep it warm, compensating for the lack of insulating fat in the body.

Hyperactivity: The body relies on adrenaline (a hormone that is normally released during times of stress and fear) instead of food for energy. This causes excitability.

See the heart stuff? That's what should scare you. Most heart events have clues before the catastrophic event. Today is your clue.

Guess I'm not eating enough....got with a personal trainer ....did a few squats and my heart rate went way up .....sat down and passed out 3 times , they called the paramedics , trying to work out on an empty stomach did I think plus my cals. are too low .

my BMR is around 1500 and to loose I was eating 600 - 800 cals a day and swimming 90 min.

I have some rethinking to do as soon as my brain starts workin again ...still feel a lil out of it

It takes eating super low for me to loose weight I've been doing this for 6 months now and have gauged what works and what doesn't .

If you think this is correct then I would suspect mental illness. PLease listen to what we are all telling you. You need to increase your calories, by a lot, urgently.

First, lets not throw the mental illness card. (nobody here knows all of the specifics) Second, if the OP has been eating at such drastic levels for 6 months, a slower increase may be more appropriate so the body can adjust.

OP: You might want to see your doctor, tell them what has been going on and go from there.

I didn't throw it out there immediately. I am judging by OPs refusal to believe 600 odd calories a day for 6 months+ could be anything less than right, despite science saying differently, despite everyone else saying differently, and despite having passed out multiple times.

Of course I am not a doctor, but something is going on there, and I think they need to see a doctor as I did mention earlier.
I think if this was a young girl saying all this stuff people would have been saying she is an anorexic and to get help from the first post.

Guess I'm not eating enough....got with a personal trainer ....did a few squats and my heart rate went way up .....sat down and passed out 3 times , they called the paramedics , trying to work out on an empty stomach did I think plus my cals. are too low .

my BMR is around 1500 and to loose I was eating 600 - 800 cals a day and swimming 90 min.

I have some rethinking to do as soon as my brain starts workin again ...still feel a lil out of it

Thanks for the responses , I had just woken up , went to the gym ,still half asleep.. PT did ask if I ate anything , I'm a male 57 , {the avatar is not me} thought I would start cross training as I'm 9 lbs. from my goal weight , even though I have been swimming for 6 months everyday ...the new routine threw me . being 55 lbs. over weight for years I hated walking and my legs are not in good shape , Just 20 squats with no weight did it

It takes eating super low for me to loose weight I've been doing this for 6 months now and have gauged what works and what doesn't .

Since I'm almost there I will increase cals and go into cross training slowly

I hope your personal trainer told you "not" to eat that low of calories!

DUDE!!!!

Yes. I'm yelling at you. I weigh 179 pounds and am cutting at 1850 (which is seriously low). There are plenty of people here who can help you plan your calorie intake and eating plan. Do not continue on this path.