Scientifically speaking, it is best not to.
Because basketball is aerobic exercise and fitness is anaerobic exercise.
Doing a lot of aerobic exercise during fitness is not conducive to muscle formation.
Muscles need a lot of time to adjust, rest and grow after fitness. If you do a lot of aerobic exercise at this time, you will not only be unable to rest and grow, but also consume nutrients in your body, thus making your body thinner and thinner, and the result may not be worth the candle.
Please pay attention to rest when exercising, ensure adequate 9-hour sleep and adequate nutrition, including basic consumption: starch and muscle growth are necessary: protein.