Research Center in Kinanthropometry and Human Performance, Sports Center, Federal University of Santa Catarina, Florianopolis 88040-900, SC, Brazil.
Physical Effort Laboratory, Sports Center, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil.
Int J Environ Res Public Health. 2021 Apr 21;18(9):4405. doi: 10.3390/ijerph18094405.
To examine the association between phase angle (PhA) and bioelectrical impedance vector analysis (BIVA) and components of physical performance in male youth soccer players.
Cross-sectional.
Sixty-two players from two professional soccer academies were recruited. Electrical bioimpedance was used to obtain the PhA and BIVA. Body fat (BF) and lean soft tissue mass (LSTM) were measured by dual-energy X-ray absorptiometry. All players completed physical tests including the standing long jump (SLJ), Carminatti's test (peak speed at the end of the test, PS), 10 m and 30 m straight-line sprints, and repeated-sprint ability (RSA) test (RSAbest and RSAmean times).
Adjusting for chronological age, BF, and LSTM, multiple regression analysis outputs showed that PhA remained inversely related to RSAmean (β = -0.362; < 0.001), RSAbest (β = -0.239; = 0.020), 10 m (β = -0.379; = 0.012), and 30 m (β = -0.438; < 0.001) sprint times, while the association with PS and SLJ performance were statistically non-significant. In addition, BIVA showed that differences in confidence ellipses were found between athletes in the reference population and the study sample ( < 0.05). The tolerance ellipses indicated that the athletes in the present study had more total body water (TCW) and lower proportions of intracellular water (ICW) to extracellular water (ECW). The reference population had more TCW and ICW/ECW.
Our results suggest that young soccer players with higher PhA values, indicating better cell integrity and functionality, have better performance in typical anaerobic running activities, such as sprinting speed and RSA performance, adjusted to age and body composition characteristics.
探讨相位角（PhA）与生物电阻抗矢量分析（BIVA）及其在男性青年足球运动员身体机能成分之间的关系。
横断面研究。
招募了来自两个职业足球学院的 62 名运动员。使用生物电阻抗测量法获得 PhA 和 BIVA。通过双能 X 射线吸收法测量体脂（BF）和瘦体组织质量（LSTM）。所有运动员均完成了身体测试，包括立定跳远（SLJ）、卡米纳蒂测试（测试结束时的最大速度 PS）、10 米和 30 米直线冲刺以及重复冲刺能力（RSA）测试（RSAbest 和 RSAmean 冲刺次数）。
在调整了实际年龄、BF 和 LSTM 后，多元回归分析结果显示，PhA 与 RSAmean（β=-0.362；<0.001）、RSAbest（β=-0.239；=0.020）、10 米（β=-0.379；=0.012）和 30 米（β=-0.438；<0.001）冲刺时间呈负相关，而与 PS 和 SLJ 表现的相关性无统计学意义。此外，BIVA 显示运动员参考人群和研究样本之间的置信椭圆存在差异（<0.05）。包容椭圆表明，本研究中的运动员具有更多的总体水（TCW）和较低的细胞内水（ICW）与细胞外水（ECW）比例。参考人群具有更多的 TCW 和 ICW/ECW。
我们的研究结果表明，PhA 值较高的年轻足球运动员具有更好的细胞完整性和功能，在典型的无氧跑步活动中表现更好，如冲刺速度和 RSA 表现，这与年龄和身体成分特征有关。
