Key result
Ramp protocol treadmill testing achieved submaximal heart rate in 90.1% of examinations with a mean exercise time of 10.0 ± 2.0 minutes.
Why the study?
How do reached max VO2, velocity, and inclination compare to predicted values in a ramp treadmill protocol across different ages and sexes?
Observational (n=1,840)
How do reached max VO2, velocity, and inclination compare to predicted values in a ramp treadmill protocol across different ages and sexes?
Using actual reached maximum VO2, velocity, and inclination to guide ramp protocol prescription may optimize treadmill testing performance across all age groups and sexes.
Answers are grounded in this paper and cite their sources.
May support tailoring ramp protocols to achieved parameters; leaves open prospective validation for optimizing test performance across ages and sexes.
OBJECTIVE: To suggest criteria to guide protocol prescription in ramp treadmill testing, according to sex and age, based on velocity, inclination, and max VO2 reached by the population studied. METHODS: Prospective study describing heart rate (HR), time, velocity, inclination, and VO2 estimated at maximum effort of 1840 individuals from 4 to 79 years old, who performed a treadmill test (TT) according to the ramp protocol. A paired Student t test was used to assess the difference between predicted and reached max VO2, calculated according to the formulas of the "American College of Sports Medicine". RESULTS: Submaximal HR was surpassed in 90.1% of the examinations, with a mean time of 10.0 2.0 minute. Initial and peak inclination velocity of the exercise and max VO2 were inversely proportional to age and were greater in male patients. Predicted Max VO2 was significantly lower than that reached in all patients, except for female children and adolescents (age < 20 years old). CONCLUSION: Use of velocity, inclination, and maximum VO2 actually reached, as a criterion in prescribing the ramp protocol may help in the performance of exercise in treadmill testing. The ramp protocol was well accepted in all age groups and sexes with exercise time within the programmed 8 to 12 minutes.
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Silva et al. (2003) conducted an observational in Treadmill testing (n=1,840). Ramp protocol treadmill testing was evaluated on Difference between predicted and reached max VO2. Ramp protocol treadmill testing achieved submaximal heart rate in 90.1% of examinations with a mean exercise time of 10.0 ± 2.0 minutes.
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