The comparison of protocol design for the purpose of eliciting peak physiological
Cardiff Metropolitan University
MetadataDangos cofnod eitem llawn
The aim of this research was to establish whether using a single protocol for testing metabolic thresholds and peak physiological responses does in fact invalidate the data produced for these physiological parameters. The study presents data comparing peak physiological responses including; oxygen consumption (VO2peak), carbon dioxide production (VCO2peak), power output [PO (W)], Wpeak (W), respiratory exchange ratio (RERpeak), heart rate (HRpeak), breath frequency (BFpeak), ventilation (VEpeak) and central and peripheral rating of perceived exertion (RPE), between two incremental protocols of 1-minute and 3-minute stage duration. These parameters at ventilatory threshold 1 (VT1) and ventilatory threshold 2 (VT2)/ respiratory compensation point (RCP) were also reported during both protocols. Seven moderately active collegiate males took part in the research [mean (±SD) height 182 (6.3) cm, weight 90 (15.4) kg and age 20 (1) yrs]. The participants completed three arm crank ergometry (ACE) protocols, initially a familiarisation test to determine VO2peak, and create relative working intensity’s during the latter two incremental tests. Both incremental protocols began at an intensity of 20% of the Wpeak established via the familiarisation protocol with 10% increments every 1 or 3 minutes dependant on protocol. Breath-by-breath analysis via computer system was used to analyse inspired and expired gases. Results reported test time(s) was highest during the 3- min protocol compared to the 1-min protocol [1689 (85) vs 928 (31), P<0.05], however the 1-min protocol produced the highest Wpeak (W) [173 (34) vs 144 (31), P<0.05] and RERpeak compared to the 3-min protocol [1.22 (0.07) vs 1.13 (0.04), P<0.05]. Analysis also reported that VT2 occurred at a significantly lower absolute PO during the 3-min protocol when compared to the 1-min [113 (19), 124 (22), P<0.05]. However VT2 occurred at a significantly higher relative PO (% of Wpeak) during the 3-min protocol when compared to the 1-min protocol [80 (7), 72 (4), P<0.05]. Nevertheless, no significant difference (P>0.05) was stated for VO2, relative VO2, HR or relative HR at the same breakpoint defined as VT2. It was unfeasible to determine VT1 during the 3-minute protocol via the V-slope method. Data from the research suggested that it is possible to test peak physiological responses, VT1 and VT2 during a single 1-minute incremental protocol. This finding can be applied to future research and allow simultaneous calculation of peak physiological responses and metabolic thresholds using a single incremental protocol.
DEGREE OF BACHELOR OF SCIENCE (HONOURS) SPORT AND EXERCISE SCIENCE
Yn dangos eitemau sy’n perthyn drwy deitl, awdur, pwnc a chrynodeb.
The effects of an increasing versus constant crank rate on peak physiological responses during incremental arm crank ergometry. Price, M.J.; Bottoms, L.; Smith, Paul M.; Nicholettos, A. (2011)We examined the effects of concomitant increases in crank rate and power output on incremental arm crank ergometry. Ten healthy males undertook three incremental upper body exercise tests to volitional exhaustion. The first ...
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