Development of New Weight Jacket
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.7 Vol.7】
A new weight-jacket (Weight-Sleeves) was developed for the purpose of increasing intensity of exercise. The Weight-Sleeves was a jacket with short sleeves. As extra weight, flexible weight materials (intertwined lead fibers) were sewed over parts of chests, shoulders and upper arms.
Effects of wearing Weight-Sleeves were examined and compared with traditional weight loads such as weight-vest or weight-band. In order to evaluate intensity of the whole body exercise, oxygen consumption during 10 different exercises was measured under 3 conditions; (1) unloaded, (2) wearing Weight-Sleeves (2kg), (3) wearing weight-vest (2kg). Velocity of the upper limb in horizontal extension was measured with Weight-Sleeves or weight-band of different weight to test the effects of weight on velocity in motion. Reaction force caused by Weight-Sleeves or weight-band during rotation around the long axis of the upper limb was also examined by use of accelerometer sticked on weight load.
The results were as follows:
(1) In exercise mainly using the lower limbs, the rate of increase in oxygen consumption was 5-15% both in wearing Weight-Sleeves and in wearing weight-vest. In exercise concentrating on the upper limbs and/or the trunk, however, the incremental rate of oxygen consumption in wearing Weight-Sleeves showed 8-28% and was larger than in wearing weight-vest by 5-15%.
(2) Winding weight-band around the wrist caused agility of the upper limb to decrease greatly according to increase in weight. As for Weight-Sleeves, however, wearing one-sided sleeve of less than 2kg did not diminished so much agility of the upper limb.
(3) In wearing Weight-Sleeves, reaction force of twist motion of the upper limbs was smaller than in putting on weight-band because of the sleeve structure of Weight-Sleeves.
From these results, it was suggested that wearing Weight-Sleeves could increase intensity of the whole body exercise without any serious restriction of movement of the upper limbs, therefore, by use of Weight-Sleeves in ordinary skill practice, training effects on aerobic power and muscle strength could be expected as well as skill improvement.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
Effects of wearing Weight-Sleeves were examined and compared with traditional weight loads such as weight-vest or weight-band. In order to evaluate intensity of the whole body exercise, oxygen consumption during 10 different exercises was measured under 3 conditions; (1) unloaded, (2) wearing Weight-Sleeves (2kg), (3) wearing weight-vest (2kg). Velocity of the upper limb in horizontal extension was measured with Weight-Sleeves or weight-band of different weight to test the effects of weight on velocity in motion. Reaction force caused by Weight-Sleeves or weight-band during rotation around the long axis of the upper limb was also examined by use of accelerometer sticked on weight load.
The results were as follows:
(1) In exercise mainly using the lower limbs, the rate of increase in oxygen consumption was 5-15% both in wearing Weight-Sleeves and in wearing weight-vest. In exercise concentrating on the upper limbs and/or the trunk, however, the incremental rate of oxygen consumption in wearing Weight-Sleeves showed 8-28% and was larger than in wearing weight-vest by 5-15%.
(2) Winding weight-band around the wrist caused agility of the upper limb to decrease greatly according to increase in weight. As for Weight-Sleeves, however, wearing one-sided sleeve of less than 2kg did not diminished so much agility of the upper limb.
(3) In wearing Weight-Sleeves, reaction force of twist motion of the upper limbs was smaller than in putting on weight-band because of the sleeve structure of Weight-Sleeves.
From these results, it was suggested that wearing Weight-Sleeves could increase intensity of the whole body exercise without any serious restriction of movement of the upper limbs, therefore, by use of Weight-Sleeves in ordinary skill practice, training effects on aerobic power and muscle strength could be expected as well as skill improvement.
DESCENTE SPORTS SCIENCE Vol.7/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Shuichi Hiruta, Midori Shimaoka, Kiyoshi Tsuruhara, Kando Kobayashi |
|---|---|
| University or institution | Nagoya University |
Keywords