Table 1. Mean (± SD) data assessed during the resisted swimming tests (semi-tethered and full tethered swimming).

v (m.s-1)	External Load (N)	SF (cycles.min-1)	DaST (N)	kaST (kg.m-1)
2.22 (± 0.07) [vMAX]	0.0 [FST]	59.6 (± 3.5)	186.8 (± 13.2)	37.9 (± 2.0)
1.70 (± 0.14) [vST]	66.0 [FST]	59.9 (± 3.7)	120.8 (± 13.2)	41.9 (± 5.5)
1.55 (± 0.12) [vST]	90.0 [FST]	60.2 (± 3.3)	96.8 (± 13.2)	40.3 (± 5.2)
1.36 (± 0.15) [vST]	115.0 [FST]	60.2 (± 3.6)	71.8 (± 13.2)	39.4 (± 9.1)
1.19 (± 0.18) [vST]	135.0 [FST]	60.4 (± 3.9)	51.8 (± 13.2)	37.5 (± 11.4)
1.00 (± 0.19) [vST]	160.0 [FST]	60.8 (± 4.1)	26.8 (± 13.2)	27.0 (± 14.7) *
0.00 [vT]	186.8 (± 13.2) [FT]	60.5 (± 3.1)	0.0	-

Active drag was calculated, at each load, as: Da_ST = (F_T - F_ST). Active drag coefficient was calculated as ka_ST = Da_ST / v_ST². v: swimmer’s velocity; v_MAX: maximal free-swimming velocity; v_ST: swimming velocity during semi-tethered swimming; F_ST: the external load during semi-tethered swimming; F_T: the external load during full-tethered swimming; SF: stroke frequency; Da_ST: active drag, as determined by means of the “residual thrust method”; ka_ST: active drag coefficient, as determined by means of the “residual thrust method”;* significantly different from all other conditions of ka_ST.