Moderate-intensity endurance type exercise more effective
Dr. Luc van Loon, PhD, Professor of Physiology of Exercise, Maastricht University Medical Center and colleagues examined the impact of activities of daily living (ADL) versus moderate-intensity endurance-type exercise on 24 hour glycemic control in patients with type 2 diabetes.
For this study 27 men with type 2 diabetes participated in a randomized crossover study consisting of three experimental periods of three days each.
Participants under sedentary control conditions and under conditions in which prolonged sedentary time was reduced either by three 15-min bouts of ADL; walking at a pace to reflect the energy expended in typical activities of daily living or by a single 45-min bout of moderate-intensity endurance-type exercise.
The researchers evaluated blood glucose control by continuous glucose monitoring, and plasma insulin concentrations were determined in frequently sampled venous blood samples.
Overall, time spent in a hyperglycemic state was significantly lower with exercise and walking activities did not significantly reduce glucose.
Moderate-intensity exercise strongly reduced the glycemic response to breakfast and, to a lesser extent, to lunch and dinner (P<0.05 for all) but declines in postprandial glucose concentrations with light activity did not reach statistical significance.
In their conclusion the researchers write “when matched for total duration, moderate-intensity endurance-type exercise represents a more effective strategy to improve daily blood glucose homeostasis than repeated bouts of ADL. Nevertheless, the introduction of repeated bouts of ADL during prolonged sedentary behavior forms a valuable strategy to improve postprandial glucose handling in patients with type 2 diabetes.”