Digit Ratio (2D:4D) and lactate response during a football-specific intermittent field fitness test in women

IF 2.1 3区医学 Q2 OBSTETRICS & GYNECOLOGY

Early human development Pub Date : 2025-12-01 Epub Date: 2025-10-16 DOI:10.1016/j.earlhumdev.2025.106414

Hadi Nobari , Elena Mainer-Pardos , Demetrio Lozano , John T. Manning , Koulla Parpa , Laura Mason , Marcos Michaelides , Alberto Roso-Moliner

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引用次数: 0

Abstract

Background

Lactate, an important respiratory substrate, is generated during exercise. Digit ratio (2D:4D) is strongly associated with lactate in men over a range of exercise intensities, but in women the association has been reported as weaker and restricted to high running speeds. Here we report a replication of this finding in women employing the 30–15 Intermittent Fitness Test (30–15 IFT).

Method

The participants were amateur female football players. Digit lengths, height, body composition and VO_2max were measured. The 30–15 IFT involves 30-s shuttle runs between lines positioned 40 m apart. Audio signals determine the pace, starting at 10 km/h and increasing by 0.5 km/h to a maximum of 18 km/h.

Results

Mean lactate levels (mmol/L) rose with running speed, ranging from 2.13 (±0.78) to 13.63 (±2.83). At running speeds 12 km/h to 16 km/h (n = 28 and 26 respectively) there were positive correlations between lactate and weight and BMI and negative associations with VO_2max. At 18 km/h (n = 16) right 2D:4D was positively related and height negatively related to lactate. The former remained significant after the effect of height was removed.

Conclusion

Our findings from the 30–15 IFT in the field are similar to those reported from a laboratory treadmill test. The digit ratio, especially right 2D:4D, is positively associated with lactate levels during running in women, independent of height. In contrast previous findings in men the association applies to high running speeds only.

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女性足球间歇体能测试中手指比（2D:4D）和乳酸反应。

背景：乳酸是一种重要的呼吸底物，在运动过程中产生。手指比例（2D:4D）在一定运动强度范围内与男性的乳酸水平密切相关，但据报道，女性的这种关联较弱，仅限于高跑步速度。在这里，我们报告了在使用30-15间歇体能测试（30-15 IFT）的女性中重复这一发现。方法：以业余女子足球运动员为研究对象。测量手指长度、身高、身体组成和最大摄氧量。30-15分钟的IFT包括30-s的线路之间的穿梭运行，这些线路相距40米。音频信号决定速度，从10公里/小时开始，增加0.5公里/小时，最高可达18公里/小时。结果：平均乳酸水平（mmol/L）随跑步速度升高，范围为2.13（±0.78）~ 13.63（±2.83）；在跑步速度为12 ~ 16 km/h时（n = 28和26），乳酸与体重和BMI呈正相关，与最大摄氧量呈负相关。在18 km/h （n = 16）右2D:4D与乳酸水平呈正相关，身高与乳酸水平呈负相关。在去除高度影响后，前者仍然显著。结论：我们从现场30-15 IFT的发现与实验室跑步机测试的结果相似。女性的手指比例，尤其是右手2D:4D，与跑步时的乳酸水平呈正相关，与身高无关。与之前对男性的研究结果相反，这种关联只适用于高跑步速度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Early human development 医学-妇产科学

CiteScore

4.40

自引率

4.00%

发文量

100

审稿时长

46 days

期刊介绍： Established as an authoritative, highly cited voice on early human development, Early Human Development provides a unique opportunity for researchers and clinicians to bridge the communication gap between disciplines. Creating a forum for the productive exchange of ideas concerning early human growth and development, the journal publishes original research and clinical papers with particular emphasis on the continuum between fetal life and the perinatal period; aspects of postnatal growth influenced by early events; and the safeguarding of the quality of human survival. The first comprehensive and interdisciplinary journal in this area of growing importance, Early Human Development offers pertinent contributions to the following subject areas: Fetology; perinatology; pediatrics; growth and development; obstetrics; reproduction and fertility; epidemiology; behavioural sciences; nutrition and metabolism; teratology; neurology; brain biology; developmental psychology and screening.