Key result
The incremental ramp load protocol measured maximum threshold pressure with greater accuracy and less progression compared to the incremental step loading protocol in healthy individuals.
Why the study?
Existing protocols for obtaining maximum threshold pressure have limited precision to evaluate inspiratory muscle endurance, requiring new protocols to allow more reliable measurements.
Does an incremental ramp load protocol improve the assessment of inspiratory muscle endurance compared to an incremental step loading protocol in healthy individuals?
RCT (n=92)
randomly allocated
No
Does an incremental ramp load protocol improve the assessment of inspiratory muscle endurance compared to an incremental step loading protocol in healthy individuals?
An incremental ramp load protocol provides a more accurate and thorough measurement of inspiratory muscle endurance in healthy individuals compared to the traditional step loading protocol.
Answers are grounded in this paper and cite their sources.
New ramp protocol may improve inspiratory endurance measurement precision; leaves open validation in patients before clinical use.
INTRODUCTION: Protocols for obtaíníng the maxímum threshold pressure have been applied wíth límited precision to evaluate ínspiratory muscle endurance. In thís sense, new protocols are needed to allow more relíable measurements. The purpose of the present study was to compare a new incremental ramp load protocol for the evaluation of ínspíratory muscle endurance wíth the most used protocol in healthy indíviduals. METHODS: This was a prospective cross-sectional study carried out ín a síngle center. Nínety-two healthy indíviduals (43 men [22 ± 3 years] and 49 women [22 ± 3 years]) were randomly allocated to perform: (i) íncremental ramp load protocol and (íí) íncremental step loadíng protocol. The sustained pressure threshold (or maximum threshold pressure), maximum threshold pressure/dynamic strength índex ratío, time untíl task faílure, as well as dífference between the mean heart rate of the last five mínutes of baselíne and the peak heart rate of the last 30 seconds of each protocol were measured. RESULTS: Incremental ramp load protocol wíth small íncreases in the load and starting from mínímum values of strength index was able to evaluate the inspiratory muscle endurance through the maxímum threshold pressure of healthy indívíduals. CONCLUSION: The present study suggests that the íncremental ramp load protocol is able to measure maximum threshold pressure in a more thorough way, wíth less progression and greater accuracy in the load stratification compared to the límited incremental step loading protocol and with a safe and expected cardiovascular response in healthy individuals.
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Areias et al. (2024) conducted an RCT in healthy individuals (n=92). Incremental ramp load protocol vs. Incremental step loading protocol was evaluated on Maximum threshold pressure, maximum threshold pressure/dynamic strength index ratio, time until task failure, and heart rate difference. The incremental ramp load protocol measured maximum threshold pressure with greater accuracy and less progression compared to the incremental step loading protocol in healthy individuals.
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