Summary
In general, one should be careful after vaccination with sports and not directly exercise with high intensity. However, a distinction must also be made here. Experienced athletes, who have been doing their training program regularly for years, are more likely to start exercising again a little earlier than inexperienced or irregular athletes.
The more the body is accustomed to regular exercise, the sooner it is possible to resume sports after a vaccination. If you do not feel well after a vaccination, you should give your body a day or two break before you start intensive training again.