The Participant Who Reports Dizziness Mid-Class
You are teaching a 45-minute indoor cycling class in a room kept at 74°F with limited airflow. At minute 28, during a hard climb at high resistance, a participant named Marcus, 58, waves you over. He is pale, sweating heavily, and says he feels 'lightheaded and a little sick.' He has been drinking water. He denies chest pain and denies shortness of breath at rest. His resistance is high and his cadence has dropped. He tells you he takes a blood pressure medication and skipped breakfast. He wants to keep riding because he is 'almost done.'
1. Walk through your response in order, and explain why each step comes where it does.
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Order of response:
- Stop the exercise immediately. Lightheadedness plus pallor plus nausea during exertion is a stop signal, not a push-through signal. His 'almost done' is not a clinical argument.
- Get him off the bike and seated or lying down with legs elevated if he tolerates it, in a cooler, ventilated spot. Do not let him stand abruptly - orthostatic risk after stopping hard effort.
- Assess: is he alert and oriented? Is the dizziness resolving with rest and cooling? Does he have chest pain, shortness of breath, palpitations, or confusion? Those change the situation from 'monitor' to 'emergency response.'
- Offer cool water and a cool towel; do not force food or drink.
- Keep the class running with a clear, calm cue to the room so you do not create a scene, while keeping your attention on him.
- If symptoms do not resolve promptly, worsen, or if any red-flag symptom appears, activate EMS per facility protocol.
Reasoning: stop first because continued exertion is the main modifiable risk. Position and cooling next because they address the likely contributors (heat, orthostasis, low blood sugar, medication effects). Assessment before reassurance because 'he looks better' is not the same as 'he is safe.'
2. Marcus says he feels better after five minutes and asks to finish the last ten minutes easy. What do you allow, and what is your reasoning?
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Do not put him back on the bike in this session. Allow him to sit in the cool area or walk slowly if he is fully recovered, but end his ride for the day.
Reasoning:
- A single episode of exertional lightheadedness with pallor and nausea is unresolved until the cause is understood. 'Feels better after rest' is expected and does not rule out recurrence when effort resumes.
- He has at least three plausible contributors stacked: heat and poor airflow, a blood pressure medication that can blunt the response to posture and effort, and no breakfast (low blood sugar). Restarting effort re-exposes him to all three.
- The safe default is to end the session, document, and advise him to follow up with his physician about exercise and his medication timing, and to eat before class.
This is a scope-of-practice judgment: you are not diagnosing, you are declining to re-expose someone to a condition you cannot evaluate.
3. What do you change about the class environment and your pre-class practice going forward?
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Environment and practice changes:
- Address the heat and airflow: request fans, open doors if allowed, lower the thermostat, and reduce the intensity ceiling on hot, low-airflow days.
- Build a pre-class brief: hydration, eating beforehand, medication awareness (tell me if you take blood pressure or glucose medication), and 'stop and tell me if you feel dizzy, faint, or nauseous.'
- Screen informally at the start: ask about new medications, recent illness, and whether anyone has eaten.
- Know and rehearse the facility emergency action plan: where the AED is, who calls EMS, who meets the responders.
- Document the episode and the advice given.
Reasoning: the exam rewards prevention that is systemic, not just reactive. Individual vigilance does not scale; environment and pre-class communication do.