From this study, it is revealed that blood glucose level get decreased due to extensive work for 1.5 hours (90 minutes) in place-bo condition. In the place-bo study, the mean blood glucose before the commencement of work was 90.2 ± 4.684 mg / dl. (Mean ± SD, n=20) and after the work it was found to be 82.05 ± 1.04 mg/dl. In the next day, glucose solution (6mg/500ml/Kg body weight) was given, 30 minutes after the commencement of the work. In this case, increase was seen of about 16.05 ± 1.79 (Mean ± SD, n=20). In the further study, glucose supplement was given twice (at the interval of 30 minutes and 50 minutes). In this case, the increase of blood glucose in this case was reported to be 18.95 ± 2.53 mg/dl. It was reported to be higher than the previous case. In the last study, glucose supplementation was made thrice (30, 50 and 70 minutes) In this case, the increase was reported to be 19.06 ± 1.53 mg/dl. (Mean ± SD, n=20). From the above results, it was found that highest increasement of blood glucose was observed when glucose supplements were given at three times (30 min, 50 min and 70 minutes after the commencement of the work) during the extensive work.