2024-03-29T11:59:41Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02005948
2023-05-02T05:47:10Z
1213:1620:1621:1682906832321
Comparison of force patterns between elastic and rigid dumbbell in arm exercise
HIRUTA, Shuichi
SHIMAOKA, Midori
IKEGAMI, Yasuo
KOBAYASHl, kando
open access
A new stick-shaped dumbbell made of elastic materials was developed. This elastic dumbbell (ED) was 51.5 cm long, 2.0 kg in weight and has an diameter of 4.0 cm. Force patterns produced during repetitive arm exercise with ED as well as with a rigid dumbbell (RD) of the same weight and diameter as ED were investigated. The center part of each dumbbell was attached to the bottom of the force transducer (load cell). A handle was fixed to the top of the load cell. A subject was asked to grip the handle and to lift the load cell repeatedly at the following tempos; 77, 116, 154, 193 and 231 times per minute. These tempos corresponded to 50, 75, 100, 125 and 150 % of the frequency of resonance of ED, respectively. Force was continuously recorded by a pen oscillograph. Angle of elbow joint was displayed on oscilloscope to regulate the amplitude of movement. At tempo 77 and 116, peak force value (PFV) of both dumbbells were almost the same. After the peak, the force of ED was found to be at higher level than that of RD. At tempo 154, PFV of ED was 1.6 times as high as that of RD, which might be explained by resonance. At tempo 191 and 231, PFV of ED were smaller than that of RD. From these characteristics of force curve of ED, it was suggested that larger force could be exerted in wider range of joint angle in strength training with ED than with RD.
名古屋大学総合保健体育科学センター
The Research Center of Health, Physical Fitness and Sports, Nagoya University
1986-03-31
eng
departmental bulletin paper
VoR
https://doi.org/10.18999/njhpfs.9.1.111
http://hdl.handle.net/2237/0002005948
https://nagoya.repo.nii.ac.jp/records/2005948
10.18999/njhpfs.9.1.111
0289-5412
総合保健体育科学
Nagoya Journal of Health, Physical Fitness & Sports
9
1
111
115
https://nagoya.repo.nii.ac.jp/record/2005948/files/njhpfs_9_1_111.pdf
application/pdf
1.9 MB
2023-05-02