Abe Daijiro, Yoshida Takayoshi, Ueoka Hatsumi, Sugiyama Koji, Fukuoka Yoshiyuki
Biodynamics Laboratory, Center for Health and Sports Science, Kyushu Sangyo University, 2-3-1 Matsukadai, 813-8503 Higashi-ku, Fukuoka Japan.
Department of Health and Sports Sciences, Graduate School of Medicine, Osaka University, 1-17 Machikaneyama, 560-0043 Toyonaka, Osaka Japan.
BMC Sports Sci Med Rehabil. 2015 Jan 22;7:5. doi: 10.1186/2052-1847-7-5. eCollection 2015.
To investigate more practical handling of Borg's ratings of perceived exertion (RPE) and category-ratio scale of RPE (CR-10), we evaluated interrelationships between RPE, CR-10, and blood lactate concentrations (bLa) during incremental treadmill running tests for young females with different aerobic fitness levels.
Oxygen consumption, heart rate, bLa, RPE, and CR-10 were measured from distance runners (DR; n = 15), race walkers (RW; n = 6), and untrained females (UT; n = 11). These variables corresponding to the lactate threshold (LT) and onset of blood lactate accumulation (OBLA) were compared among these groups.
The UT had significantly lower RPE at LT than DR and RW, although the CR-10 at LT was not significantly different among these groups. The CR-10 at OBLA was significantly lower for the UT than DR. The relationship between bLa and CR-10 was approximated well by two linear regression lines in all groups. The bLa at the intersection only for the RW was significantly lower than that at LT, however, such intersections were observed at CR-10 = 3.1 to 3.2 without significant group differences. The CR-10 scores at LT and intersections were not significantly different in each group.
These results suggested that an intersection between CR-10 and bLa was observed at the CR-10 score around three points of first half regardless of the aerobic fitness levels in young females, and such CR-10 scores would be associated with LT.
为了研究对博格主观用力感觉评分（RPE）和RPE类别比率量表（CR-10）更实际的应用，我们评估了不同有氧适能水平的年轻女性在递增式跑步机跑步测试期间RPE、CR-10与血乳酸浓度（bLa）之间的相互关系。
对长跑运动员（DR；n = 15）、竞走运动员（RW；n = 6）和未受过训练的女性（UT；n = 11）测量耗氧量、心率、bLa、RPE和CR-10。比较这些组中与乳酸阈（LT）和血乳酸堆积起始点（OBLA）相对应的这些变量。
UT组在LT时的RPE显著低于DR组和RW组，尽管这些组在LT时的CR-10没有显著差异。UT组在OBLA时的CR-10显著低于DR组。在所有组中，bLa与CR-10之间的关系通过两条线性回归线能很好地拟合。然而，仅RW组在交点处的bLa显著低于其在LT时的bLa，不过在CR-10 = 3.1至3.2时观察到这些交点，且无显著的组间差异。每组在LT和交点处的CR-10得分无显著差异。
这些结果表明，无论年轻女性的有氧适能水平如何，在CR-10得分约为上半场三分左右时可观察到CR-10与bLa的交点，且这些CR-10得分可能与LT相关。
