We just don't know.
This study Adverse Metabolic Response to Regular Exercise: Is It a Rare or Common Occurrence? was reported in PLoS One yesterday (online).
This is the first study like this I've ever seen. According to the study authors:
"Whether there are people who experience adverse changes in cardiovascular and diabetes risk factors has never been addressed."This just underscores the need for physical therapists to monitor basic, cardiovascular signs in response to exercise.
- Blood pressure
- respiratory rate
- oxygen stauration
- rate of perceived effort
- et al
- only 11% of physical therapists routinely measure blood pressure
- only 38% of physical therapists routinely measure Body Mass Index (BMI)
- only 21% of physical therapists routinely advise patients to quit smoking
- only 29%% of physical therapists routinely complete a neurological examination in diabetic patients
- only 26% of physical therapists routinely complete a footwear examination in diabetic patients
- only 6% of physical therapists routinely measure gait velocity in their older patients
- fasting plasma HDL-cholesterol (HDL-C)
- triglycerides (TG)
- insulin (FI)
But, before changing state practice acts we need to measure the basic stuff.
Otherwise we'll never know.