한국 남자 청소년의 VO2max 추정을 위한 새로운 20-m PST 프로토콜과 추정식의 타당도 및 신뢰도
Validity and Reliability of a New 20-m PST Protocol for Predicting VO2max of Male Youths Aged 13-18 Years
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PURPOSE: To develop and validate regression models to estimate maximal oxygen uptake (VO2max) from the new 20-m Progressive Shuttle Test (20-m PST) in Korean male youths aged 13-18 years. METHODS: The new 20-m PST and VO2max were assessed in a sample of 80 participants. Participants underwent a treadmill test (TT) in the laboratory and the new 20-m PST protocol (starting at 5.0 km/h and increasing by 0.75 km/h every 1 min) in a gymnasium. Participants in the validation study performed the TT with the stationary metabolic cart and the 20-m PST with a portable metabolic cart once, as well as the 20-m PST without the portable metabolic cart twice for test-retest reliability. All tests were conducted at least three days apart and in a random order. RESULTS: Mean measured VO2max (55.4±6.7 mL/kg/min) from the potable metabolic cart was significantly increased from that measured during the GXT from stationary metabolic cart (52.6±7.0 mL/kg/min, p=.001) using the new 20-m PST protocol. But it was a narrow range (2.8 mL/kg/min). The measured VO2max from the potable and stationary metabolic cart correlated at r=.89 (p<.001). Test-retest of the 20-m PST yielded comparable results (Laps r=.94 & final speed r=.89). New regression equations were developed from present data to predict VO2max for male youths: y=.875×BMI+2.031×DT (min.sec)+51.856 (r=.60, SEE=5.54 mL/kg/min). CONCLUSIONS: It is concluded that (a) the new 20-m PST protocol is a valid and reliable test and (b) this equation developed in this study provides valid estimates of VO2max of Korean male youths aged 13-18 years.
Abstract
PURPOSE: To develop and validate regression models to estimate maximal oxygen uptake (VO2max) from the new 20-m Progressive Shuttle Test (20-m PST) in Korean male youths aged 13-18 years. METHODS: The new 20-m PST and VO2max were assessed in a sample of 80 participants. Participants underwent a treadmill test (TT) in the laboratory and the new 20-m PST protocol (starting at 5.0 km/h and increasing by 0.75 km/h every 1 min) in a gymnasium. Participants in the validation study performed the TT with the stationary metabolic cart and the 20-m PST with a portable metabolic cart once, as well as the 20-m PST without the portable metabolic cart twice for test-retest reliability. All tests were conducted at least three days apart and in a random order. RESULTS: Mean measured VO2max (55.4±6.7 mL/kg/min) from the potable metabolic cart was significantly increased from that measured during the GXT from stationary metabolic cart (52.6±7.0 mL/kg/min, p=.001) using the new 20-m PST protocol. But it was a narrow range (2.8 mL/kg/min). The measured VO2max from the potable and stationary metabolic cart correlated at r=.89 (p<.001). Test-retest of the 20-m PST yielded comparable results (Laps r=.94 & final speed r=.89). New regression equations were developed from present data to predict VO2max for male youths: y=.875×BMI+2.031×DT (min.sec)+51.856 (r=.60, SEE=5.54 mL/kg/min). CONCLUSIONS: It is concluded that (a) the new 20-m PST protocol is a valid and reliable test and (b) this equation developed in this study provides valid estimates of VO2max of Korean male youths aged 13-18 years.
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