The fitness blind spots most people don't know:

1. Cutting carbs leads to quick weight loss, but it's mostly water loss, and metabolism will worsen. Over time, various small issues may arise.
2. To lose fat, stair climbing is the best aerobic exercise, with heart rate controlled between 120-140, for about 40 minutes.
3. Anaerobic exercise 3-4 times a week is sufficient; don't pursue quantity, focus on quality, especially the movements.
4. Don't target specific areas for training; full-body workouts are essential.