EFFECT OF CADENCE ON TIME TRIAL PERFORMANCE IN RECREATIONAL FEMALE CYCLISTS

The impact of pedaling cadence on cycling performance remains unresolved especially in female cyclists. The purpose of this study was to determine the effect of cadence on time trial (TT) performance in recreational female cyclists. Ten recreational female cyclists volunteered to participate in this study. Subjects performed 3 exercise sessions: 1 to assess peak oxygen uptake ((V) over doto(2)peak) and 2 TTs. Cadence was randomly ordered and fixed for each TT (60 or 100 rpm), whereas power output (PO) was freely adjusted by the participant, as tolerated. Time trial time, heart rate (HR), blood lactate, PO, (V) over doto(2), and ratings of perceived exertion were measured throughout the TTs. The major finding of this study was the significantly faster (p = 0.001) TT time during the 60-rpm condition (34:23 +/- 4:21) vs. the 100-rpm condition (37:34 +/- 5:53). Also the 60-rpm TT resulted in significant differences for HR (155.9 +/- 3.97 vs. 161.2 +/- 5.20 b.min(-1), p=0.04), gross efficiency, (21.1 +/- 0.37 vs. 17.7 +/- 0.85%, p < 0.001), and PO (147 +/- 7.06 vs. 129 +/- 10.62 W, p=0.003). Thus, a slower cycling cadence was associated with greater mechanical efficiency and PO, resulting in significantly better performance in a TT. These results suggest that recreational female cyclists may benefit from adopting a low cadence during an 8-km TT.