- 著者
- Katsuyuki MORISHITA Hiroshi KARASUNO Yuka YOKOI Kazunori MOROZUMI Hisayoshi OGIHARA Toshikazu ITO Takayuki FUJIWARA Tetsuya FUJIMOTO Koji ABE
- 出版者
- 日本理学療法士協会
- 雑誌
- Journal of the Japanese Physical Therapy Association (ISSN:13441272)
- 巻号頁・発行日
- vol.17, no.1, pp.1-7, 2014 (Released:2014-12-20)
- 参考文献数
- 32
- 被引用文献数
- 19
Purpose: This study aimed to clarify the effects of therapeutic ultrasound on intramuscular local blood circulation (and oxygen dynamics) using near-infrared spectroscopy (NIRS). Participants: The participants were 11 healthy males. Methods: All participants performed all three trials; (1) the ultrasound (US group), (2) without powered ultrasound (placebo group), and (3) rest (control group). Ultrasound was applied at 3 MHz, 1.0 W/cm2, and 100% duty cycle for 10 minutes. Evaluation index were oxygenated, deoxygenated, and total hemoglobin (Hb) concentrations in the intramuscular and skin surface temperature (SST). The experimental protocol was a total of 40 minutes, that is, 10 minutes before trial (rest), 10 minutes during the trial (ultrasound, placebo, and control), and 20 minutes after trial (rest). The NIRS and SST data collected before and after the trial were divided into 5 minutes intervals for further analysis. Results: Oxygenated and total hemoglobin levels were significantly higher in the US group than in the placebo and control groups for the 20 minutes after ultrasound ( p < 0.01). The SST was significantly higher in the US group than in the control for 15 minutes after ultrasound ( p < 0.05), while it was significantly lower in the placebo group than in the US and control groups for 20 minutes after the trials ( p < 0.01). Conclusion: The effects of ultrasound were maintained for 20 minutes after the trial on intramuscular blood circulation and oxygen dynamics. These effects were caused by a combination of thermal and mechanical effects of the ultrasound.
- 著者
- Katsuyuki Morishita Hiroshi Karasuno Yuka Yokoi Kazunori Morozumi Hisayoshi Ogihara Toshikazu Ito Masaaki Hanaoka Takayuki Fujiwara Tetsuya Fujimoto Koji Abe
- 出版者
- 理学療法科学学会
- 雑誌
- Journal of Physical Therapy Science (ISSN:09155287)
- 巻号頁・発行日
- vol.26, no.5, pp.711-715, 2014 (Released:2014-05-29)
- 参考文献数
- 23
- 被引用文献数
- 7 29
[Purpose] This study aimed to clarify the effects of therapeutic ultrasound on range of motion and stretch pain and the relationships between the effects. [Subjects] The subjects were 15 healthy males. [Methods] Subjects performed all three interventions: (1) ultrasound (US group), (2) without powered ultrasound (placebo group), and (3) rest (control group). Ultrasound was applied at 3 MHz with an intensity of 1.0 W/cm2 and a 100% duty cycle for 10 minutes. The evaluation indices were active and passive range of motion (ROM), stretch pain (visual analog scale; VAS), and skin surface temperature (SST). The experimental protocol lasted a total of 40 minutes; this was comprised of 10 minutes before the intervention, 10 minutes during the intervention (US, placebo, and control), and 20 minutes after the intervention. [Results] ROM and SST were significantly higher in the US group than in the placebo and control groups for the 20 minutes after ultrasound, though there was no change in stretch pain. [Conclusion] The effects of ultrasound on ROM and SST were maintained for 20 minutes after the intervention. The SST increased with ultrasound and decreased afterwards. Additionally, the SST tended to return to baseline levels within 20 minutes after ultrasound exposure. Therefore, these effects were caused by a combination of thermal and mechanical effects of the ultrasound.