Target heights alter the energetics of drop jumps when drop height is held constant

Journal of Strength and Conditioning Research
Aaron J Decker, Steve T McCaw

Abstract

Plyometrics are a popular form of training the stretch-shortening cycle in competitive athletes and recreational athletes. One method of controlling intensity is to vary the dropping height during the training session. It may be possible to alter the intensity by creating a target height to jump over when holding the dropping height constant. Fifteen college recreational athletes performed 15 trials of 60-cm depth jumps over 3 different target heights (40, 60, and 80 cm). One-way repeated measures analysis of variance was used to identify significant differences in kinematic and kinetic variables for both the concentric and eccentric phases. There were no significant differences in eccentric work found between the 3 conditions. Significant differences were found in the total work performed during the concentric portion of the jumps between the 40- and 60-cm trials but not between the 60- and 80-cm trials. These results were found to be different at each joint of the lower extremity as compared with past research. Power analysis showed no significant differences between target heights, which may suggest that higher target heights may not be necessary to achieve the same ground contact parameters. Overall analysis of the variable...Continue Reading

References

Jan 1, 1994·Ergonomics·A Lees, E Fahmi
Dec 1, 1993·Journal of Sports Sciences·J T ViitasaloJ Lahtinen
Oct 12, 2001·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·A ArampatzisG P Brüggemann
Nov 17, 2001·Journal of Strength and Conditioning Research·M M Read, C Cisar
Aug 24, 2004·Journal of Strength and Conditioning Research·Mark WalshGert-Peter Brüggemann
May 21, 2005·Journal of Strength and Conditioning Research·Kevin R FordTimothy E Hewett

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.