Questions: In which one of the categories of event massage should the therapist be on the lookout for dizziness, nausea, red skin or confusion: inter-event massage, post-event massage, pre-event massage, or training?

The answer is the second one: post-event massage.

Explanation for each option:

1. Inter-event massage: This type of massage is typically done between events or activities to help maintain performance and prevent injury. While it is important to monitor the athlete's condition, the symptoms mentioned (dizziness, nausea, red skin, or confusion) are more likely to occur after the event rather than between events.

2. Post-event massage: This is the correct answer. After an event, the body is often in a state of fatigue and stress, which can lead to symptoms such as dizziness, nausea, red skin, or confusion. The therapist should be vigilant for these signs as they may indicate dehydration, overheating, or other issues that need to be addressed.

3. Pre-event massage: This massage is done before an event to prepare the athlete's body for performance. While it is important to ensure the athlete is in good condition, the symptoms mentioned are less likely to occur before the event.

4. Training: During regular training sessions, monitoring for these symptoms is important, but they are more commonly associated with the stress and exertion of an actual event, particularly after it has concluded.

In summary, post-event massage is the category where the therapist should be most vigilant for symptoms like dizziness, nausea, red skin, or confusion, as these can indicate the body's response to the exertion and stress of the event.