If you really can't persist, you can take a proper rest and continue practicing. In addition, Tai Ji Chuan is more demanding. Every movement should be in place, he can attack and attack, and all systems in Tai Ji Chuan should be practiced for at least 10 years. Therefore, it is very important to arrange the practice time according to personal physique and physical condition.
The above suggestions are for reference only, and the specific time needs to be decided according to the actual situation of the individual.