The Overcrowded Studio and the Broken Air Handler

No - not as planned, and possibly not at all in that room. The reasoning:

1. Capacity is a safety limit, not a suggestion. The studio is rated for 24; 31 people in a single-door, windowless room with a failing ventilation system creates a crowd-and-heat hazard. In an evacuation or a medical emergency, a single door and obstructed floor space are the difference between a controlled exit and a crush.
2. Heat plus step choreography is a compounding risk. Step work involves balance, coordination, and quick direction changes; heat and poor air quality degrade both and raise the risk of falls and heat illness. 79°F and rising with no air movement is not a safe environment for a 50-minute moderate-to-vigorous class.
3. 'It's your call' is not cover. As the instructor on the floor, you own the immediate safety decision, but you should also flag the air handler and the missing capacity policy to management in writing.

Practical plan:

• Reduce the class to the rated capacity (24), and offer the overflow a modified floor-based circuit in an adjacent space if one exists, or a credit/rain-check.
• Remove or heavily modify the step component given the heat - a no-step, lower-intensity circuit is safer and still a good workout.
• Propped door for airflow if facility policy allows, water-break reminders, and explicit permission for participants to leave early.
• Cancel outright if the room keeps heating up or the air handler fails completely.

The tested judgment: you do not let social pressure ('31 people came!') override a hard environmental limit.

You modify at the exercise level, not by excluding people.

Pregnant participants:

• Avoid supine positions after the first trimester; offer side-lying or seated alternatives.
• Avoid overheating - in an already hot room this is the dominant concern. Encourage frequent water breaks, lower the overall pace, and tell them explicitly that stepping out to cool down is expected, not a failure.
• Avoid exercises with a high fall risk and avoid breath-holding/Valsalva during the dumbbell circuit.
• Ask privately before class whether their provider gave any specific restrictions; do not assume.

Knee brace participant:

• Reduce range of motion and load on the braced side; substitute step-ups for shallower lunges or seated leg extensions; avoid deep flexion under load and avoid pivoting/twisting on that leg.
• Watch for compensatory hip and low-back strain when one side is limited.

Whole-class design:

• Give every exercise a 'level 1 / level 2' option so nobody is singled out.
• Keep the circuit in a fixed footprint to reduce collisions in a crowded room.
• Position yourself centrally so you can see everyone, and do a mid-class visual sweep for overheating (flushed, stopping, hands on knees).

The point: in a hot, crowded room, the safe default is lower intensity, lower impact, and more frequent rest - and modifications are offered to everyone.

This is the professional-responsibility half of the case.

1. Report the air handler in writing - not just a hallway mention. Note the grinding noise, the 79°F+ reading, the class size, and the date/time. Written reports create a record and get maintenance scheduled.
2. Recommend a written maximum-occupancy policy for the studio, including a posted capacity sign and a procedure for overflow (waitlist, second session, credit). 'It's your call' at the front desk means there is a policy gap, and the instructor should not be the only control.
3. Do not run an over-capacity class as a habit just because it is popular; document that you capped it and why.
4. Follow up on the incident-reporting side - if anyone showed signs of heat illness, document it per facility procedure.
5. Escalate if nothing changes. If the air handler is still broken next week and the room is still over capacity, raise it to the manager in writing and consider declining to teach in that room until it is resolved.

The tested judgment: an instructor's duty of care does not end when the music stops, and 'nobody told me the rules' is not a defense when you can see the hazard.