Antolinez Angie K, Edwards Philip F, Holmes Michael W R, Button Duane C
School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL, Canada.
Faculty of Applied Health Sciences, Brock University, St. Catharines, ON, Canada.
Front Sports Act Living. 2025 Jan 3;6:1446909. doi: 10.3389/fspor.2024.1446909. eCollection 2024.
The bilateral deficit (BLD) is a reduction in the amount of force during a bilateral task vs. the total force from the unilateral limbs performing the same task. We quantified the BLD during an upper body Wingate Anaerobic Test (WAnT) and evaluated the influence of sex and load on the BLD in force.
Eighteen participants performed maximum handgrip strength, voluntary isometric contractions (MVIC), and three 30s WAnTs. In each session they completed the tasks with the dominant-arm, non-dominant arm and with both arms, randomly. WAnT intensities were 3, 4, and 5% body weight (BW). Instantaneous force data was used to calculate the BLD.
Males showed greater ( < .001) BLD of force at 3, 4, and 5% BW than females by -17, -27.6 and -36%, respectively and had a greater ( < .001) BLD of force than females throughout time points 1-10 s, 11-20 s, and 21-30 s by -16, -29 and -35%, respectively. Females showed a difference ( < .001) in BLD of force between loads (-19% at 3%, -10% at 4% and +7% at 5%). Males had an increase ( < .001) in BLD of force from the beginning to the end of the WAnT starting with -18% (1-10 s), -38% (11-20 s) and -40% (21-30 s). WAnT had the highest BLD, followed by MVIC and grip strength.
BLD in force is present during WAnTs and the sex-load interaction is important for determining this BLD during this maximal cycling test. Thus, when developing training or rehabilitation programs related to BLD in force, sex, load and exercise type should be taken into consideration.
双侧力量缺失（BLD）是指在双侧任务中所产生的力量相较于执行相同任务的单侧肢体力量总和有所减少。我们对上半身温盖特无氧测试（WAnT）期间的双侧力量缺失进行了量化，并评估了性别和负荷对力量方面双侧力量缺失的影响。
18名参与者进行了最大握力、自愿等长收缩（MVIC）以及三次30秒的WAnT测试。在每次测试中，他们分别用优势手臂、非优势手臂以及双臂随机完成任务。WAnT的强度分别为3%、4%和5%体重（BW）。利用瞬时力量数据来计算双侧力量缺失。
在3%、4%和5%体重时，男性的双侧力量缺失分别比女性高-17%、-27.6%和-36%（<0.001），并且在整个1-10秒、11-20秒和21-30秒的时间点上，男性的双侧力量缺失分别比女性高-16%、-29%和-35%（<0.001）。女性在不同负荷下的双侧力量缺失存在差异（<0.001）（3%体重时为-19%，4%体重时为-10%，5%体重时为+7%）。从WAnT开始到结束，男性的双侧力量缺失有所增加（<0.001），起始时为-18%（1-10秒），之后为-38%（11-20秒）和-40%（21-30秒）。WAnT的双侧力量缺失最高，其次是MVIC和握力。
在WAnT测试期间存在力量方面的双侧力量缺失，并且在这个最大强度骑行测试中，性别-负荷相互作用对于确定这种双侧力量缺失很重要。因此，在制定与力量方面双侧力量缺失相关的训练或康复计划时，应考虑性别、负荷和运动类型。
