It can be a home gym because during free time he can do it so it can give him good results.
The formula for BMI is
BMI= kg/m^2
A BMI of 25.0 or more is overweight and a healthy and average BMI ranges from 18.5 to 24.9. However, BMI only applies to adults from 18-65 years old. You can always go online and search up BMI calculator and all you need to do is enter your weight and height.
When the blood gets to the capillaries it feeds the whole body nutrients and holds back waste materials so it isn't spread through our body.