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- W2007989988 abstract "PURPOSE: This study examined metabolic responses to repetitive jumping on platforms of varying rigidity. While it is known that this type of exercise is an excellent aerobic activity, it is not known if jumping on a thinner, less rigid surface will affect metabolic demand. METHODS: Six males participated in this study. Participants were required to complete three jumping trials, each on a different platform. Platform thicknesses were 1/4“, 3/8”, and 1/2“. All trials were conducted on the Digi-Jump machine, a device not yet available to the public that is specifically designed for repetitive jumping and sport-specific exercise. Subjects were required to maintain a cadence of 120 jumps per minute (JPMs) until volitional exhaustion or until fifteen minutes had elapsed, at which point the trial was terminated by the investigator. Each minute, oxygen uptake (VO2), heart rate (HR), respiratory exchange ratio (RER), total body rating of perceived exertion (RPEtb), upper-leg rpe (RPEul), and lower-leg rpe (RPEll) was recorded. Following each trial, subjects were asked to comment on any specific discomfort felt with this type of exercise and how or if it differed from other types of cardiovascular exercise. RESULTS: Statistical analysis was performed on each variable using an average of the final three minutes of each trial. This was done to evaluate differences in steady-state metabolic cost of a trial. Repeated measures ANO VA revealed no differences in metabolic variables during repetitive jumping on any of the three platforms (VO2: p=.93; HR: p=.87; RER: p=.19; RPEtb: p=. 41; RPEul: p=.56; and RPEll: p=.32). CONCLUSIONS: Results of this study indicate that metabolic cost of repetitive jumping exercise is similar when jumping on surfaces of varying rigidity from 1/4“ - 1/2”. However, subjects' comments following the exercise trials revealed differing subjective biases towards the different surfaces. While some subjects commented that the “thinner” platform was much more difficult due to the decreased rigidity and resulting perceived difficulty in maintaining cadence, others remarked that is was easier due to the increased “spring” one experiences from the lesser rigidity. Further studies are needed to investigate these conflicting responses and to confirm the role of repetitive jumping as a recommended aerobic exercise." @default.
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- W2007989988 date "2007-05-01" @default.
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- W2007989988 title "Evaluation of Metabolic Variables During Repetitive Jumping on the Digi-Jump Machine Using Platforms of Varying Rigidity" @default.
- W2007989988 doi "https://doi.org/10.1249/01.mss.0000274913.68464.66" @default.
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