Athlete External Loads Across a Collegiate Men's Lacrosse Season.

Fields, JB, Jones, MT, Feit, MK, and Jagim, AR. Athlete external loads across a collegiate men's lacrosse season. J Strength Cond Res XX(X): 000-000, 2022-Tracking and quantifying athlete workload may provide insight into best practice periodization strategies and workload management. Limited information exists detailing the external demands associated with collegiate men's lacrosse. Therefore, the purpose of this study was to investigate and compare practice, game, and positional differences across a lacrosse season. Male collegiate lacrosse athletes (n = 17; body mass: 79.9 kg ± 9.7 kg; body fat %: 14.7 ± 3.8%) wore a global positional system device during practices (n = 66) and games (n = 19). External load metrics were total distance (TD), sprint distance (SD), accelerations (>3 m·s-2), sprint efforts, player load (PL), PL/min, and top speed. Multiple analysis of variances assessed differences in external loads across session (practice versus game) and sport position (attackers, midfielders, and defenders). A 3 × 4 analysis of variance was used to determine a position-by-time (first quarter [Q1], second quarter [Q2], third quarter [Q3], and fourth quarter [Q4]) interaction (p < 0.05). Total distance (p < 0.001, η2: 0.047), SD (p < 0.001, η2: 0.093), sprint efforts (p < 0.001, η2: 0.077), PL (p < 0.001, η2: 0.022), and top speeds (p < 0.001, η2: 0.086) were all higher in games compared with practices. Attackers and defenders covered more TD (p < 0.001, η2 = 0.0257), accelerations (p < 0.001, η2 = 0.126), PL (p < 0.001, η2 = 0.233), and PL/min (p < 0.001, η2 = 0.193) than midfielders. Attackers and midfielders covered more SD (p = 0.002 η2 = 0.043), sprint efforts (p < 0.001, η2 = 0.053), and achieved higher top speed (p < 0.001, η2 = 0.0063) than defenders. Volume and intensity metrics declined by Q4 in attackers and defenders (p < 0.05), whereas external load measures did not differ across quarters for midfielders. Monitoring in-game external loads can assist coaches with individualizing training programs and preparing athletes for game demands.