Abstract
This study aimed to determine whether the optimal minimal velocity threshold
(MVT) provides more precise estimates of one-repetition maximum (1RM) in the
hexagonal barbell deadlift (HBD) than the general and individual MVTs. The 1RMs
of 27 resistance-trained males were predicted using three types of MVT: (i)
General MVT: averaged across subjects’ velocity of the 1RM trial
(0.25 m·s-1), (ii) individual MVT: velocity attained
during the 1RM trial, and (iii) Optimal MVT: MVT that eliminated the
differences between the actual and predicted 1RM. Two individual load-velocity
relationships were modelled considering five (30-50-70-80%1RM) or six
(30-50-70-80-90%1RM) loading conditions. Negligible differences (Effect
size<0.20), low absolute errors (<5% of the actual 1RM), and extremely
high correlations (r>0.90) were observed between the actual and six
predicted 1RMs. The only significant difference was the lower raw errors for the
90%1RM condition (0.60±7.34 kg) compared to the 80%1RM condition (2.27±7.54 kg;
p=0.013). These results suggest that the individual load-velocity
relationship offers an accurate estimation of the HBD 1RM in resistance-trained
males, and these estimates could maintain similar levels of precision across
different types of MVT (general, individual, and optimal) and final tested loads
(80%1RM and 90%1RM).
Keywords
muscle strength - resistance training - velocity-based training - weight lifting
