What question did this study set out to answer?

To evaluate the concurrent validity, test-retest reliability, and diurnal variation of a portable back and leg dynamometer.

January 1, 1994Ergonomics

Sources of variation in back and leg dynamometry

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ACA. COLDWELLSLiverpool College GAGreg AtkinsonPreventive Cardiology TRT. ReillyVirginia Aquarium & Marine Science Center

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Implication

Validation study demonstrates high reliability and diurnal variation in back and leg dynamometry among healthy adults, indicating strength testing must account for time of day.

Key Points

To evaluate the concurrent validity, test-retest reliability, and diurnal variation of a portable back and leg dynamometer.
Compared portable Takei dynamometer strength measurements against a computer-controlled Lido dynamometer in 19 participants for leg extension and 18 participants for back extension.
Evaluated test-retest reliability across a 6-day interval using the Takei dynamometer in 36 subjects aged 19–30 years.
Assessed diurnal variation in back and leg strength across 6 different times of day in 4 subjects aged 21–30 years.
Concurrent validity between the Takei and Lido dynamometers was strong for both leg strength (r = 0.90, p < 0.001) and back strength (r = 0.79, p < 0.001).
Test-retest reliability was high for leg strength (r = 0.80, p < 0.001; test: 1450.4 ± 428.6 N vs retest: 1432.8 ± 449.1 N, p > 0.05) and back strength (r = 0.91, p < 0.001; test: 1057.2 ± 309.9 N vs retest: 1106.2 ± 334.4 N, 4.5% difference, p < 0.05).
A significant diurnal effect influenced performance (p < 0.05), with peak strength occurring late in the day at 16:53 h for the back and 18:20 h for the legs.

Cite This Study

COLDWELLS et al. (1994) studied this question.

synapsesocial.com/papers/6a154c22d73ae7522a4e2674 https://doi.org/10.1080/00140139408963625

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Implication

Validation study demonstrates high reliability and diurnal variation in back and leg dynamometry among healthy adults, indicating strength testing must account for time of day.

Sources of variation in back and leg dynamometry

Discussion

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Implication

Key Points

Cite This Study

Sources of variation in back and leg dynamometry

Discussion

Member takes

Implication

Key Points

Cite This Study

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