Relationships between measures of boat acceleration and performance in rowing, with and without controlling for stroke rate and power output

Purpose Boat acceleration profiles provide a valuable feedback tool by reflecting both rower technique and force application. Relationships between measures of boat velocity to inform interpretation in rowing were investigated here. Methods Thirteen male singles, nine female eight pairs, seven pairs participated (national international level, age 18–27 y). Data from each stroke for 74 2000-m races collected using Peach PowerLine OptimEye S5 GPS units. General linear mixed modelling established modifying effects on two within-crew SD variables class, without with adjustment rate power, identify potential performance-enhancement strategies given power. Measures magnitude at six peaks or dips, the change (jerk) these dips analyzed. Results interpreted rejection non-substantial substantial hypotheses smallest 0.3%. Several had decisively (-2.4–2.5%) before Most effect magnitudes reduced after although maximum negative drive acceleration, peak jerk during mid-drive phase, late recovery remained (-1.8–1.9%) some classes. Conclusion Greater absolute values are related improved performance, likely delayed centre-of-mass preparation catch. first early also associated propulsive drive. These proposed mechanisms performance enhancement additional increases power output.