奇特的阶段速度对长板压力缩棒速度在年轻人和老年人的影响
Antenor Calandrini1, Eduardo Macedo Penna1, Elren Passos Monteiro1
1Programa de Pós-graduação em Ciências do Movimento Humano, Universidade Federal do Pará - Campus Castanhal, Castanhal, Brazil.
International journal of sports medicine
|February 12, 2024
概括
高速异常动作提高后续的同心性能,特别是在较轻的负载 (30% 1RM),有利于年轻和老年女性. 这一发现表明了普遍适用的培训策略.
科学领域:
- 运动生理学 运动生理学
- 生物力学 生物力学
- 老年学是指老年学的学科.
背景情况:
- 奇特的运动对于肌肉力量的产生至关重要.
- 了解神经肌肉反应的年龄相关差异对于有效的训练至关重要.
- 异常相速对随后的同心性能的影响需要进一步研究.
研究的目的:
- 为了研究棒速度在异常阶段对随后的同心性能的影响.
- 为了比较年轻和老年女性之间的这些影响.
- 为了确定不同偏心速度 (高与中等) 和负载 (30%与60%1RM) 对性能的影响.
主要方法:
- 12名老年妇女和16名年轻妇女参加了这次活动.
- 参与者执行了史密斯机床压机,以高速度异常 (HV_ECC) 和中等速度异常 (MV_ECC) 动作在1重复最大 (1RM) 的30%和60%.
- 测量了平均推进速度 (MPV),峰值速度 (PV) 和平均功率 (MP);使用双向ANOVA和重复测量分析数据.
主要成果:
- 老年妇女在30%的HV_ECC下改善了MPV和MP 1RM.
- 年轻女性在所有变量中表现出优异的表现,HV_ECC在30%和60%的1RM.
- HV_ECC显著影响了随后的同心性能,特别是在较轻的负载下.
结论:
- 高速异常动作提高后续的同心性能,特别是在较轻的负载 (30% 1RM).
- 这种效应在年轻女性和老年女性中都被观察到,这表明潜在的普遍培训效益.
- 结合HV_ECC的训练策略可能有助于改善不同年龄组的肌肉性能.
相关概念视频
Eccentric Loading
376
Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
376
Changes in the Appendicular Skeleton with Age
2.0K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
2.0K
General Case of Eccentric Axial Loading
185
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
185
The Effect of Aging on Tissues
2.1K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.1K
Bone Disorders
3.5K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
3.5K
Design of Columns under an Eccentric Load
530
Designing columns to withstand eccentric loads is a critical aspect of structural engineering, ensuring structures can support off-center loads without failure. This design process must account for the additional normal stresses introduced by eccentric loading, which can significantly influence a column's stress distribution and overall stability. An eccentric load applied to a column induces normal stresses that can be conceptualized as a combination of stresses due to an equivalent...
530


