There is no absolute correlation between the two, so it is possible in theory. However, due to the need of physical recovery, there is usually a time interval (5- 12 hours).

Whether you can have sex after fitness really depends on the level of testosterone (androgen). If the hormone level drops sharply after intensive training, there is no way to hey hey in a short time. But in the long run, this temporary decline is a good way to stimulate and improve the overall hormone level.