运动与股四头肌冷却时间。

Exercise and quadriceps muscle cooling time.

作者信息

Long Blaine C, Cordova Mitchell L, Brucker Jody B, Demchak Timothy J, Stone Marcus B

机构信息

Brigham Young University, Provo, UT 84602, USA.

出版信息

J Athl Train. 2005 Oct-Dec;40(4):260-3.

PMID:16404445

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1323285/

Abstract

CONTEXT

Cryotherapy is commonly used for a variety of purposes; however, the body's response to cryotherapy immediately postexercise is unknown.

OBJECTIVE

To investigate the effect of prior exercise on crushed-ice-bag treatment of a large muscle group.

DESIGN

2 x 3 repeated-measures design on depth (1 cm and 2 cm below adipose tissue) and treatment (exercise followed by ice, exercise followed by no ice, and no exercise followed by ice).

SETTING

Sports Injury Research Laboratory.

PATIENTS OR OTHER PARTICIPANTS

Six physically active, uninjured male volunteers.

INTERVENTION(S): For the 2 exercise conditions, subjects rode a stationary cycle ergometer at 70% to 80% of their age-predicted maximum heart rate, as calculated by the Karvonen method. For the no-exercise condition, subjects lay supine on a treatment table. The cryotherapy treatment consisted of a 1-kg ice bag applied to the anterior mid thigh. For the no-ice condition, subjects lay supine on a treatment table.

MAIN OUTCOME MEASURE(S): Time required for the intramuscular temperatures at the 1-cm and 2-cm depths below adipose tissue to return to pre-exercise baseline and time required to cool the 1-cm and 2-cm depths to 10 degrees C below the pre-exercise temperature.

RESULTS

The time to cool the rectus femoris to the pre-exercise temperature using a crushed-ice-bag treatment was reduced by approximately 40 minutes (P < .001). The ice bag cooled the 1-cm and 2-cm depths to the pre-exercise temperature within 7 minutes (P = .38), but the 2-cm tissue depth took nearly 13.5 minutes longer to cool than the 1-cm depth when no ice was applied (P = .001). The 1-cm depth cooled to 10 degrees C below the pre-exercise temperature about 8 minutes sooner than the 2-cm depth, regardless of whether the tissue was exercised or not (P < .001). Exercise shortened the cooling time to 10 degrees C below the pre-exercise temperature by approximately 13 minutes (P = .05).

CONCLUSIONS

Exercise before cooling with a crushed-ice bag enhanced the removal of intramuscular heat.

摘要

背景

冷冻疗法常用于多种目的；然而，身体在运动后立即对冷冻疗法的反应尚不清楚。

目的

研究先前运动对大肌肉群冰敷袋治疗的影响。

设计

在深度（脂肪组织以下1厘米和2厘米）和治疗方式（运动后冰敷、运动后不冰敷、不运动后冰敷）上采用2×3重复测量设计。

地点

运动损伤研究实验室。

患者或其他参与者

6名身体活跃、未受伤的男性志愿者。

干预措施

在两种运动条件下，受试者按照卡尔沃宁法计算，以其年龄预测最大心率的70%至80%在固定自行车测力计上骑行。在不运动条件下，受试者仰卧在治疗台上。冷冻疗法治疗包括将一个1千克的冰袋敷在前大腿中部。在不冰敷条件下，受试者仰卧在治疗台上。

主要观察指标

脂肪组织以下1厘米和2厘米深度处的肌肉温度恢复到运动前基线所需的时间，以及将1厘米和2厘米深度冷却至比运动前温度低10摄氏度所需的时间。

结果

使用冰敷袋将股直肌冷却至运动前温度的时间减少了约40分钟（P <.001）。冰袋在7分钟内将1厘米和2厘米深度冷却至运动前温度（P =.38），但在不冰敷时，2厘米组织深度比1厘米深度冷却所需时间长近13.5分钟（P =.001）。无论组织是否运动，1厘米深度比2厘米深度冷却至比运动前温度低10摄氏度大约早8分钟（P <.001）。运动使冷却至比运动前温度低10摄氏度的时间缩短了约13分钟（P =.05）。