Driving again

For the last few days I have been allowed to drive the car again. It had been 13 months without driving because of my brain bleed. Several (safe) journeys later I am, at last, starting to think again about doing some field experiments. Local driving/sitting in the car is fine, but doing any physical activity tires me totally and I still feel very wobbly when on my feet.  Doing the simplest of VLF or light beam field test is likely to exhaust me. Field work will be on the agenda soon, but I may need my wife to help set things up "in the field".