関連する実験動画

Updated: Sep 9, 2025

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

複雑なタイムトライアルコースでの推定サイクリング性能の正確な予測のための出力量の最適の体質正常化

Marton Horvath¹, Erik P Andersson¹

¹Department of Health Sciences, Swedish Winter Sports Research Centre, Mid Sweden University, Östersund, Sweden.

Frontiers in sports and active living

|September 3, 2025

まとめ

この研究は,地形や風などの外部要因を考慮してサイクリングパフォーマンスを予測する新しい方法を導入しています. 正確なレース予測のために最適のパワー・ツー・マスの指数がコース特異であることを発見しました.

科学分野:

スポーツ科学
バイオメカニクス
パフォーマンス分析

背景:

サイクリングにおける絶対的および質量標準化された出力には限界がある.
地形,風,ペース戦略などの外部要因は,パフォーマンス分析ではしばしば無視されます.

研究の目的:

外部の力がサイクリング速度に及ぼす影響を定量化するための数学的方法を導入する.
複雑なコースの平均出力に基づいて正確なサイクリングパフォーマンスの予測を可能にします.

主な方法:

5つのエリートサイクリストのタイムトライアルパフォーマンスを推定し,パワーと持続時間の関係を用いた.
仮説と現実のタイムトライアルコースに性能の見積もりを適用した.
速度,形状,および外部要因に基づいて,電力対質量比の最適質量指数を決定する.

主要な成果:

期間加算した最適質量指数はコース別であった ( $W / kg 0.6068 と W / kg 0.4891).$
これらのメトリックは,推定パフォーマンスを正確に予測しました ( $R^{2} = 0.99).$

結論:

パワーと質量比の最適質量指数はコース特有のものです.
この方法では,傾斜,風,質量のパワーを速度に変換する影響を正確に定量化します.
現実の世界でのさらなる検証が必要である.

キーワード:

アロメトリックスケーリングクリティカル・パワー数値的な方法パフォーマンス予測パワー/持続時間関係スポーツエンジニアリングタイムトライアル性能

さらに関連する動画

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test

Published on: July 27, 2015

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

関連する概念動画

Average Power

Average Power

In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.

Exercise and Muscle Performance

Exercise and Muscle Performance

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...

Metabolic Rate

Metabolic Rate

The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...

Efficiency of The Carnot Cycle

Efficiency of The Carnot Cycle

The hypothetical Carnot cycle consists of an ideal gas subjected to two isothermal and two adiabatic processes. Since the internal energy of an ideal gas depends only on its temperature, which is the same before and after the completion of the Carnot cycle, there is no change in its internal energy. Hence, using the first law of thermodynamics, the total heat exchanged by the ideal gas equals the total work done. Thus, we can quantify the efficiency of the Carnot cycle via the heat exchanged...

Exercise and Cardiac Output

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...

Maximum Power Transfer

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...