Related Experiment Video
Updated: Jan 26, 2026
08:55
Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
Published on: February 5, 2020
7.9K
Is the Optimal Load for Maximal Power Output During Hang Power Cleans Submaximal?
Summary
Optimal load for maximal power in hang power cleans (HPCs) depends on the success criteria. Submaximal loads maximize power when the receiving position is above parallel, but 1RM loads are optimal for a quarter-squat position.
Area of Science:
- Biomechanics
- Sports Science
- Strength and Conditioning
Background:
- Maximal power output in hang power cleans (HPCs) is crucial for athletic performance.
- Previous research on the optimal load for HPCs has yielded conflicting results, necessitating further investigation into underlying factors.
Purpose of the Study:
- To determine the optimal load for maximal power output during hang power cleans (HPCs) from a mechanical perspective.
- To investigate the factors influencing optimal load determination in HPCs, considering different success criteria.
Main Methods:
- Eight competitive Olympic weightlifters performed HPCs at various submaximal and maximal loads (40% to 100% of 1RM).
- Ground-reaction force and bar/body kinematics were simultaneously recorded during each lift.
- The success criterion for HPC was defined by the receiving position, specifically above parallel squat or at a quarter-squat depth.
Main Results:
- Peak power and relative peak power were maximized at 80% 1RM.
- Heavier loads (above 80% 1RM) led to significant decreases in peak bar velocity and bar displacement.
- The knee joint angle at the receiving position dropped below the quarter-squat position when loads exceeded 70% 1RM.
Conclusions:
- Submaximal loads (80% 1RM) are optimal for maximal power output in HPCs when the success criterion is achieving a position above parallel squat.
- When the success criterion is defined as a quarter-squat receiving position, the optimal load shifts to the 1RM load.
Related Concept Videos
02:36Nuclear Power
9.4K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
9.4K
01:08Power
12.9K
The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
12.9K
01:22Sums of Power
65
In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
65
01:22Instantaneous Power
893
Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
893
01:14Complex Power
895
Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
895
01:07Electrical Power
3.7K
Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
3.7K