Endurance Exercise With Moderate Vascular Occlusion: Changes In Blood Glucose Concentration

Por: Fukuda Yutaka, Izumiyama Shiyu, Kushiku Kazushi, Ono Nobufumi e Sata Shojiro.

Athens 2004: Pre-olympic Congress

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Purpose
Low-intensity exercise performed by patients with moderate vascular occlusion is known to cause skeletal muscle
hypertrophy over the short term. Further, some findings have indicated that the concentrations of blood lactate and
growth hormone are increased by such exercise. However, changes in blood glucose concentration caused by this kind
of exercise have not been elucidated. We compared changes in blood glucose concentration caused by low-intensity
endurance exercise in subjects with and without moderate vascular occlusion.

Methods
Five healthy males, aged 22-26 years old, were studied. Exercise intensity was below the lactate threshold level, and the
exercise time was 30 minutes, with a recovery time following the exercise of 30 minutes. The same protocol was
performed with (WVO: With Vascular Occlusion) and without moderate vascular occlusion (NVO: Non Vascular
Occlusion).
Blood glucose concentration was measured once before beginning the exercise, then 3 times during (at 10, 20, and 30
minutes) exercise and 3 times during the recovery (at 10, 20, and 30 minutes). The vascular occlusion point was the
proximal end of a limb, and with an occlusion pressure from 130-170 mmHg.

Results
Figure 1 shows mean blood glucose concentrations in the subjects at each measurement time. A comparison between
exercise WVO and NVO showed a significant difference at 10 minutes after beginning the exercise. Further, blood
glucose concentrations during exercise were consistently lower in the subjects WVO.

Discussion/Conclusion
Blood glucose concentration was markedly decreased 10 minutes after beginning exercise under moderate vascular
occlusion as compared to without. Our results suggest that low-intensity endurance exercise with moderate vascular
occlusion activates glucose metabolism. Additional studies are necessary to evaluate the association between lowintensity
resistance exercise with moderate vascular occlusion and glucose metabolism, as well as the applicability of
this type exercise as therapy for diabetes mellitus patients.

References
[2]. Yudai Takarada. Et La. (2000). J Appl Physiol, 88, 2097 - 2106.
[1]. Yudai Takarada. et la. (2000). J Appl Physiol, 88, 61 - 65.

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