In this small study, fructose consumption led to significantly greater increases in both systolic and diastolic blood pressure than consumption of glucose or water, and both glucose and fructose led to increased heart rate. Both fructose and glucose also led to a temporary increase in resting energy expenditure. The researchers note the differences in vascular responses to fructose and glucose ingestion might be due to their differing effects on insulin.

The aims, prescription, methodology, implementation, and adaptations of CrossFit are collectively and individually unique, defining of CrossFit, and instrumental in our program’s successes in diverse applications.