What is the limit on doing cardio workouts in the gym before it becomes unhealthy?

Answer 1

Monitor BMI (body mass index) to determine the body fat levels.

It is possible to have a BMI that is too low and excessive cardio workouts could be part of that. Many gyms can perform BMI tests, but don't trust the ones where you just stand on a scale and they look on a chart. That does not consider how muscular a person is. When I stand on a scale and look at a chart it says I have a high BMI number, but when I run the tests it says I have a lean body mass of around 214 lbs. The chart says that for me, anything over 180 is fat but the test proves otherwise.

Keep it lean but not TOO lean. If you exercise too much you might end up too lean. There isn't any specific cuttoff. Individuals doing long sessions of cardiovascular exercise should make sure they are properly hydrated, well rested and in otherwise good physical condition. The person should also be physically fit enough and know whether or not such a duration is within their capacity. Depending on the intensity, it may be advisable to take a break every 30 minutes or so. Individuals should stop exercise immediately if they feel weak, woozy or dizzy at any point. Also, individuals looking to do long sessions of exercise several times a week should make sure they're eating enough calories and resting enough to help deter overtraining. Long lasting fatigue or diminishing endurance is a sign of overtraining, and individuals should consider reducing the intensity or duration of their workouts.