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Validity of the PUSH band 2.0 and Speed4lifts to measure velocity during upper and lower body free-weight resistance exercises

journal contribution
posted on 2023-04-04, 22:59 authored by Dean CallaghanDean Callaghan, Joshua GuyJoshua Guy, Nathan ElsworthyNathan Elsworthy, Crystal Kean
Accuracy and test–retest reliability were assessed for two devices, PUSH Band 2.0 (PUSH) and Speed4lifts. Two identical sessions were performed 6–8 days apart. Twenty rugby league players performed three repetitions with 20%, 40%, 60% and 80% of estimated one repetition maximum for back squat (BS), front squat (FS), and bench press (BP). Velocity was recorded using PUSH, Speed4lifts and 3D motion analysis system (gold standard). Passing-Bablok regression analysis assessed agreement of velocity measures with the gold standard. Intraclass correlation coefficients (ICC) and coefficients of variation (CV) assessed test–retest reliability. PUSH and Speed4lifts were accurate for BS velocities <1.00 m/s and FS velocities <0.65 m/s. PUSH was accurate for BP velocities <0.65 m/s. Speed4lifts was accurate for BP velocities between 0.65–1.00 m/s. PUSH was reliable at all loads (ICC = 0.79–0.92; CV = 2.63–6.89%) except for 20% FS and BP (ICC = 0.49–0.64; CV = 3.13–3.62%). Speed4lifts was reliable at all loads (ICC = 0.70–0.96; CV = 2.57–4.26%) except for 20% BP (ICC = 0.59; CV = 4.59%). These results suggest that both devices are unsuitable for measuring the velocity of BS, FS and BP at faster velocities and at lighter loads.

History

Volume

40

Issue

9

Start Page

968

End Page

975

Number of Pages

8

eISSN

1466-447X

ISSN

0264-0414

Publisher

Informa UK Limited

Language

en

Peer Reviewed

  • Yes

Open Access

  • No

Acceptance Date

2022-01-27

Era Eligible

  • Yes

Medium

Print-Electronic

Journal

Journal of Sports Sciences

Article Number

PII S1355617722000492