相关实验视频
Updated: May 23, 2025

11:15
Determining the Contribution of the Energy Systems During Exercise
Published on: March 20, 2012
41.3K
在奥林匹克滑雪登山运动中的竞争需求和性能决定变量
Alessandro Fornasiero1,2, Aldo Savoldelli1,3, Michele Mattivi1,4
1CeRiSM, Sport Mountain and Health Research Center, University of Verona, Rovereto, Italy.
International journal of sports physiology and performance
|March 26, 2025
概括
滑雪登山者在冲刺和混合接力比赛中面临着很高的生理要求. 训练应该是量身定制的,强调混合中继的最大强度和冲刺的最高强度,以优化性能.
科学领域:
- 运动科学 运动科学 运动科学
- 运动生理学 运动生理学
- 滑雪登山 滑雪登山
背景情况:
- 滑雪登山是一种新兴的冬季运动,具有独特的冲刺和混合接力车形式.
- 了解生理需求和性能决定因素对于运动员的发展和训练优化至关重要.
研究的目的:
- 研究男性和女性滑雪登山者的竞争生理需求.
- 在冲刺和混合中继格式中识别决定性变量.
主要方法:
- 分析了76名滑雪登山者 (36名女性) 在世界杯赛事中的表现数据.
- 在20名滑雪登山者 (11名女性) 上进行最大和最高运动测试 (强度>VO2max).
- 在比赛条件下对10名滑雪登山者 (5名女性) 的小组进行生理监测.
主要成果:
- 这两种形式都引起了接近最大的心脏反应 (>95%HRmax).
- 与混合中继相比,冲刺显示出更高的上升速度和更大的依赖乳酸无氧代谢 (血液中乳酸12.9比6.3 mmol/L).
- 上坡滑雪时间主导了表现 (80-90%的差异),过渡解释了10-15%的差异. 在第二个通风门的滑雪速度和在VO2max测试结束时的最大速度预测了混合继电器性能. 超过2分钟的最大可持续滑雪速度预测了冲刺表现.
结论:
- 运动员和教练应根据特定的比赛要求来定制训练:混合接力车的近最大至最大强度和冲刺的最高强度.
- 这些发现为滑雪登山学科提供了宝贵的见解,特别是为冬季奥运会做准备.
更多相关视频
相关概念视频
Collisions in Multiple Dimensions: Problem Solving
3.5K
In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
3.5K
Work Done Over an Inclined Plane
2.7K
The center-of-mass framework helps to easily describe the work done on rigid bodies. Since the internal forces in a rigid body do no work, they can be ignored, and the external forces can be considered in the work-energy theorem.
The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
2.7K
Energy Diagrams - II
4.6K
Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The...
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The...
4.6K
Exercise and Muscle Performance
1.3K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.3K
Competition
21.3K
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
21.3K
Bearings: Problem Solving
259
Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
259

