Table 4. Intra-group indices of waveform similarity of synergies. The values are in mean (standard deviation). SE FE Synergy #1 .66 (.14) .64 (.13) Synergy #2 .64 (.17) .62 (.21) Synergy #3 .51 (.26) .68 (.09) SE, slide ergometer; FE, fixed ergometer.