Too much of a good thing?

Unless you’re a committed hypochondriac, never has there been a period in our lifetime where we have been so aware of illness and immunity. Locking down and keeping out of other people’s shadows hopefully prevents infection and keeps you healthy. We’re also told that keeping fit helps to protect against viruses, so as cyclists we should be fine.

Maybe, maybe not. It’s time to talk J-curves, open windows and 80:20 rules…

The pros and cons of exercise

Numerous studies into exercise and immunity show that regular, modest cycling boosts immunity. In general, the fitter you are, the stronger your immune system. Doctors John Campbell and James Turner of Bath University in the UK have conducted studies into this area. They have pinpointed three strands to immunity and all three are strengthened through exercise.

The first is healing wounds – for example, road