著者

Hitomi Nishizawa Teiji Kimura

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.29, no.9, pp.1555-1560, 2017 (Released:2017-09-15)

参考文献数

25

被引用文献数

11

---

[Purpose] In sports physical therapy, video of a patient’s movement or of a skilled model’s movement has been used as observational learning methods for injury prevention and movement modification. Positive effects of model video observation have been reported. This study aimed to clarify the effect on motor skill learning using a combination of model-observation and self-observation, which is thought to act as an enhanced method for active error detection by comparing model-observation and self-observation alone for acquisition of correct sports movement. [Subjects and Methods] Forty-five healthy females were randomly allocated into three groups comprising model- and self-observation, model-observation, and self-observation. The motor task performed was a half golf swing using an elastic club. Shoulder grip angle between both shoulder lines and the acromia grip strength were measured as an index of body rotation using a three-dimensional motion analyzer. Change in the shoulder grip angle in the three groups was analyzed at pre-, immediate delayed retention, and delayed retention tests. [Results] A significant difference in shoulder grip angle was observed among the three groups for the immediate delayed retention test. The combined model and self-observation group had a value closer to 90 degrees compared to the other two groups. [Conclusion] Observation combining model and self-observation exerted a positive effect on short-term motor skill learning.

著者

Joya Yui Satomi Okano Hitomi Nishizawa

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.33, no.10, pp.717-721, 2021 (Released:2021-10-13)

参考文献数

29

被引用文献数

4

---

[Purpose] Blood lactate reduction helps in understanding muscle recovery. Although light exercise and stretching are known interventions to reduce its concentration, the impact of skeletal muscle mass on blood lactate clearance is unknown. This study aimed to determine the relationships between blood lactate reduction and skeletal muscle mass following exercise. [Participants and Methods] Healthy non-athletic males performed squat jumps for 1 minute and 30 seconds. Blood lactate level was measured before and immediately after the exercise and then every 2 minutes for a period of 20 minutes. The decrease in blood lactate level was estimated as the difference between the minimum and maximum values. The rate of decrease was calculated by dividing the decrease in blood lactate level by time. Blood lactate level was measured using Lactate ProTM 2, while skeletal muscle mass was assessed using InBody 430. [Results] There was a significant positive correlation between skeletal muscle mass, the amount of blood lactate level reduction, and the rate of reduction of blood lactate level. [Conclusion] Our results demonstrated that greater skeletal muscle mass enabled a greater decrease in blood lactate level, suggesting that skeletal muscle mass may be involved in the reduction of blood lactate level after a squat jump. Interventions to increase skeletal muscle mass may promote more efficient lactate metabolism and muscle fatigue recovery.