This study aimed to investigate the feasibility of using deadlift load-velocity (L-V) relationship variables, specifically the load-intercept (L₀), to monitor resistance training intensity. Fifteen well-trained male and fifteen well-trained female athletes completed two incremental load tests, recording movement mean velocity (MV) until reaching one repetition maximum (1RM) in two sessions. Although L₀ (CV = 4.98%, ICC = 0.974) demonstrated lower between-session reliability than 1RM (CV = 3.48%, ICC = 0.989), its reliability was still at an acceptable level. Furthermore, the 1RM/L₀ ratio showed acceptable between-subjects variability (CV = 6.39%). Consequently, L₀ could serve as an alternative reference for prescribing training intensity in place of the 1RM. Both the %1RM-MV and %L₀-MV relationships were found to be valid for monitoring training intensity in the high-intensity range (absolute error ≤ 4.05%, at around 80% and 90%1RM) but not in the low-intensity range (absolute error ≥ 6.31%, from 40% to 70%1RM). Although not a complete replacement for the 1RM, the %L₀ - MV relationship still offers a practical and convenient method for monitoring deadlift training in high-intensity range (above 80%1RM), particularly in settings where frequent assessments are required.

• The one repetition maximum (1RM)/load-intercept () ratio demonstrates acceptable between-subject variability in deadlift, which supports its usefulness as a general reference metric for intensity prescription at high intensities (above 80%1RM and 65%).

• Both the %1RM-mean velocity (MV) and %-MV relationships can be applied to accurately predict training intensity during the deadlift at higher intensities above 80%1RM and 65%, whereas their predictive accuracy diminishes at lower intensities

• Although was not as reliable as the 1RM, can still be used to reliably and practically monitor training intensity in male and female athletes at high intensities, offering an alternative method to traditional 1RM testing.