The Room Is Spinning

1. Stop the session. Take the dumbbells out of his hands if he is still holding them, and get your body between him and the rack.
2. Do not let him stand or 'walk it off.' Guide him back down to the bench, or to the floor if he is unsteady, with his head supported. Standing is the position that produced the symptoms; returning to it is the risk.
3. Assess while you support. Is he alert and answering appropriately? Is he pale, clammy, or confused? Any chest pain, palpitations, shortness of breath, or one-sided weakness? Note it.
4. Escalate on red flags. Chest pain or pressure, confusion, fainting, slurred speech, or symptoms that don't resolve within a minute or two of sitting: call emergency services. Do not drive him yourself.
5. If he improves with sitting, keep him seated for several minutes, give water only once he is fully alert and swallowing normally, and recheck pulse. Recheck BP if you have a cuff.
6. End the session. No 'let's just finish the last set.'
7. Document the timeline, the symptoms in his words, what you did, and how long recovery took. Then call his physician before the next session.

Order matters: position and protect first, assess second, escalate third, document last. The most common error is letting a dizzy older adult stay upright because he says he's fine.

Most likely, orthostatic hypotension. He stood up from a seated position after a set, he takes hydrochlorothiazide (a diuretic that reduces blood volume), he is 68, and the symptoms came on within seconds of standing and are already easing as he sits. That cluster fits.

Also on the list

• Hypoglycemia: he takes metformin, which by itself rarely causes low blood sugar, but four hours since eating plus unaccustomed exercise is a plausible setup. The discriminator is symptom pattern and response - sweating, shakiness, and confusion that improve with fast carbohydrate. Don't treat blind; if he is alert and you suspect it, a small amount of fast carbohydrate and reassessment is reasonable.
• Cardiac: new palpitations, chest discomfort, or a collapse rather than simple dizziness would push this up the list and out of your hands immediately.

What you do not do is decide, tell him it was 'just dehydration,' and carry on next week. He is 68, on a diuretic, has already fallen once, and this is a new event. Refer to his physician, describe exactly what happened and when, and ask what to watch for and whether his medications or hydration need review. Get an answer before his next session.

Reasoning: you are not diagnosing. You are deciding whether the event is inside the envelope of 'normal response to exercise' - it isn't, on a first occurrence in a new client - and routing it to the person who can answer that.

Session design

• Front-load the position changes: begin with seated or supported work, and rehearse standing up slowly and deliberately rather than letting it happen incidentally between sets. Sit-to-stand becomes a trained exercise, not a transition.
• Avoid rapid supine-to-standing and avoid loaded standing that requires a fast rise. Where floor work is needed, come up through side-sitting and kneeling, with a hand on something solid.
• Extend the warm-up and keep the first several minutes at low intensity.
• Include balance work every session, near a wall or counter: single-leg stance with a fingertip assist, tandem stance, heel-toe walking, weight shifts. Progress by reducing hand support, then by adding head turns or a softer surface - not by removing the safety net first.
• Keep the strength work; leg strength is a fall-prevention tool. Emphasize hips and ankles, and calf raises, which matter for stumbling recovery.

Environment

• Clear the floor before he arrives. Rugs, cords, and dumbbells left mid-floor are exactly the hazard that put him here.
• Keep a chair or bench within arm's reach of every station he uses.
• Good lighting, water available, and a check on whether he has eaten and hydrated before he comes in.
• Ask about his shoes - supportive, closed, non-slip.

Also: ask what his home looks like. The rug edge that caused the first fall is still there, and that conversation costs nothing.