Friction-loaded cycle ergometers: Past, present and future

Vandewalle, Henry; Driss, Tarak

doi:10.1080/23311916.2015.1029237

Cited by 7 publications

(2 citation statements)

References 65 publications

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“…In addition, it was very difficult to set a given braking torque. In a clever design fully described in the review by Vandewalle and Driss [ 13 ], the addition of a loose rotating wheel controlled by a rope to which a pre-set weight was attached allowed to compensate for any change in time of the frictional forces. In addition, it was easy to set the device very precisely at the desired braking torque by playing with the weights attached to the running and the loose wheels.…”

Section: Alfred Fleisch the Inventormentioning

confidence: 99%

The contribution of Swiss scientists to the assessment of energy metabolism

2018

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Although Switzerland is considered a small country, it has its share in discoveries, inventions and developments for the assessment of energy metabolism. This includes seminal contributions to respiratory and metabolic physiology and to devices for measuring energy expenditure by direct and indirect calorimetry in vivo in humans and small animals (as well as in vitro in organs/tissues), for the purpose of evaluating the basic nutritional requirements. A strong momentum came during World War II when it was necessary to evaluate the energy requirements of soldiers protecting the country by assessing their energy expenditure, as well as to determine the nutritional needs of the Swiss civil population in time of war when food rationing was necessary to ensure national neutrality and independence. A further impetus came in the 1970s at the start of the obesity epidemics, toward a better understanding of the metabolic basis of obesity, ranging from the development of whole-body concepts to molecular mechanisms. In a trip down memory lane, this review focuses on some of the earlier leading Swiss scientists who have contributed to a better understanding of the field.

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Section: Alfred Fleisch the Inventormentioning

confidence: 99%

The contribution of Swiss scientists to the assessment of energy metabolism

2018

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“…Multiplying the circumference of the wheel by the force of friction, they find work that is perfect for each revolution. Knowing the number of revolutions and the test time, they determine the total work and average power [3].…”

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confidence: 99%

Energy conservation law in biomechanical systems

Getman

Podlesnij

Mikhieienko

2021

New Development Areas of Digitalization at the Beginning of the Third Millennium

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Energy is a scalar physical quantity, which is a single measure of various forms of motion and interaction of matter, a measure of the transition of matter from one form to another. One of the reasons that energy is so difficult to describe is that it can take many forms, and not all of them are easy to understand. In any of these cases, there are exact formulas that describe the energy stored in the system and well-defined ways to measure it.Energy is a special quantity of great importance to physics. The reason for this importance is that it is "preserved." Why is the energy saved? Because of the mathematical principle, correlating the fact that the laws of nature do not change over time, with the existence of a conserved quantity, which we by definition call "energy".The general formulation of the law of conservation and transformation of energy: in all phenomena occurring in nature, energy does not arise and does not disappear, it only turns from one species to another, while its value is

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Changing relative crank angle increases the metabolic cost of leg cycling

2017

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We find that, unlike arm cycling, radically changing the relative crank angle on a bicycle from an out-of-phase (180°) to in-phase (0°) position decreases leg cycling efficiency by ~8%. We attribute the increase to changes in cost of breathing, muscle co-activation, trunk stabilization, power fluctuations, and possibly lifting the legs during the upstroke. Our findings may have relevance in the rehabilitation of patients recovering from stroke or spinal cord injury.

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Friction-loaded cycle ergometers: Past, present and future

Cited by 7 publications

References 65 publications

The contribution of Swiss scientists to the assessment of energy metabolism

The contribution of Swiss scientists to the assessment of energy metabolism

Energy conservation law in biomechanical systems

Changing relative crank angle increases the metabolic cost of leg cycling

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