Table 1

Knee extensor peak twitch torque, contraction time, half-relaxation time, maximum rate of torque development and maximum rate of torque relaxation prior to (pre) and following (post, 24 and 48 h) 20 min of effective match-play tennis in cool and hot conditions

Contractile	Condition	Assessment time point
characteristic	Condition	Pre	Post	24 h	48 h
Peak twitch torque (N m)	Cool	58.6±7.9	50.2±10.3*	58.2±6.3	61.5±9.9
Peak twitch torque (N m)	Hot	62.4±7.3	56.9±8.5*	60.1±10.3	62.2±11.6
Contraction time (ms)	Cool	74.1±8.7	69.3±9.6	75.2±7.2	75.2±6.9
Contraction time (ms)	Hot	75.6±8.0	74.3±5.9	77.5±7.3	82.8±9.1
Half-relaxation time (ms)	Cool	67.8±9.8	69.3±10.0	73.9±8.5	74.3±8.1
Half-relaxation time (ms)	Hot	70.4±10.0	73.0±9.8	77.1±14.8	76.4±12.9
Maximum rate of torque development (N m/s¹)	Cool	1634±363	1358±318*	1582±204	1663±310
Maximum rate of torque development (N m/s¹)	Hot	1658±271	1438±210*	1599±223	1551±302
Maximum rate of torque relaxation (N m/s)	Cool	−719±161	−567±148*	−671±120	−685±149
Maximum rate of torque relaxation (N m/s)	Hot	−747±151	−607±132*	−704±143	−692±191

*Significantly different from pre, p<0.05.