Standing Broad Jump
Standing Broad Jump - Related Videos
09:15
Hydraulic Jumps
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2023
Source: Alexander S Rattner and Mahdi Nabil; Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA When liquid flows along an open channel at high velocity, the flow can become unstable, and slight disturbances can cause the liquid upper surface to transition abruptly to a higher level (Fig. 1a). This sharp increase in the liquid level is called a hydraulic jump. The increase in the liquid level causes a reduction in the average flow velocity.
09:32
Standing Waves
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Standing waves, or stationary waves, are waves that appear not to propagate and are produced by the interference of two waves traveling in opposite directions with the same frequency and amplitude. These waves appear to vibrate up and down with no linear movement and are most easily identified in vibrating finite media like a plucked guitar string,...
01:16
Hydraulic Jump: Problem Solving
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2025
To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
08:21
Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol
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Cited by 7 •
2017
This protocol describes the procedure for non-invasive recovery assessments during a 72 h recovery period. This protocol induces muscular exhaustion of the frontal thighs using countermovement jumps and uses either local cold-cuff or thermoneutral-cuff application as a recovery modality.
01:29
Hydraulic Jump
0 Views •
2025
A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
FAQs
The preparatory countermovement helps the participant load the lower limbs before takeoff, while the arm swing contributes to forward momentum. Forceful, coordinated extension of the hips, knees, and ankles then converts that preparation into horizontal propulsion. Because these actions occur in sequence, differences in coordination or neuromuscular function can influence distance, not just the strength of an individual joint.
Jump distance reflects how effectively the lower limbs produce and coordinate force in a short, explosive action. The participant must generate propulsion from a stationary start, so the result captures the combined contribution of hip, knee, and ankle extension rather than an isolated muscle action. This makes the measure useful as an indicator of overall lower-body explosive performance.
Keeping the starting position and instructions consistent is important because technique can alter the measured distance. A different countermovement, reduced arm swing, or incomplete extension may change horizontal propulsion even when underlying physical capacity is unchanged. Standardization therefore helps clinicians and researchers interpret differences as meaningful changes in performance rather than simple variations in how the jump was performed.
Testing begins with the participant stationary and using a two-footed takeoff. The participant prepares with a countermovement and arm swing, forcefully extends the hips, knees, and ankles, and lands on both feet. Researchers should provide standardized instructions, use repeated trials, and emphasize safe landing technique. These steps support consistent measurement while reducing avoidable variation during testing.
Repeated trials are valuable because a single jump may not represent the participant’s usual performance. Comparing trials under the same instructions gives clinicians or researchers a more dependable basis for monitoring distance. When testing is repeated over time, the resulting pattern can help document changes associated with training responses, recovery after injury, or altered neuromuscular function.
In medicine, the test can provide an accessible field-based measure when clinicians or researchers need information about physical performance and lower-body explosive capacity. Its value depends on maintaining the same procedures across assessments, allowing jump distance to be followed as an indicator of neuromuscular function and recovery-related change.