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. 2021 Mar 16;9(3):39. doi: 10.3390/sports9030039

Table 4.

Equations used to estimate one-repetition maximum data (1RM) and estimated 1RM data for the eccentric–concentric (Ecc-Conc) and concentric-only (Conc-only) bench-press (Grp—group average MVT based equation, OLS—ordinary least squares regression equation, LASSO—least absolute shrinkage and selection operator regression equation).

Ecc-Conc
Grp 1RM = L-Vslope × MVT * + L-Vintercept
OLS 1RM = L-Vslope × 0.543 + L-Vintercept × 1.250 − 3.721
LASSO 1RM = L-Vslope × 0.542 + L-Vintercept × 1.249 − 3.711
Conc-only
Grp 1RM = L-Vslope × MVT * + L-Vintercept
OLS 1RM = L-Vslope × 0.302 + L-Vintercept × 1.128 − 3.749
LASSO 1RM = L-Vslope × 0.299 + L-Vintercept × 1.125 − 3.735

L-Vslope—slope of the load–velocity profile; L-Vintercept—intercept of the load–velocity profile; MVT—minimum velocity threshold (i.e., velocity at 1RM); * Ecc-Conc: MVT = 0.17 m/s; Conc-only: MVT = 1.66 m/s.