Table 2. Multiple linear regressions results explaining the fatigue-induced changes in postural variables from the fatigue-induced changes in neuromuscular parameters (predictors).

Postural variable	Fatiguing exercise intensity
	25% MVIT		50% MVIT			75% MVIT
Δ Sway area	Adjusted R2	Multiple R2		Adjusted R2	Multiple R2		Adjusted R2	Multiple R2
	0.77	0.81***		0.10	0.21		0.46	0.52**
	Predictors	% R2 change		Predictors	% R2 change		Predictors	% R2 change
	Δ GAS	0.60		Δ MVIT	0.11		Δ VA	0.44
	Δ PT	0.15		Δ CT	0.09		Δ CT	0.09
	Δ MVIT	0.06
Δ ML velocity	Adjusted R2	Multiple R2		Adjusted R2	Multiple R2		Adjusted R2	Multiple R2
	0.45	0.51**		0.36	0.48*		0.18	0.28
	Predictors	% R2 change		Predictors	% R2 change		Predictors	% R2 change
	Δ GAS	0.44		Δ TA	0.29		Δ TA	0.17
	Δ PT	0.07		Δ HRT	0.05		Δ MVIT	0.11
				Δ CT	0.13
Δ AP velocity	Adjusted R2	Multiple R2		Adjusted R2	Multiple R2		Adjusted R2	Multiple R2
	0.50	0.56**		0.37	0.44*		0.32	0.44*
	Predictors	% R2 change		Predictors	% R2 change		Predictors	% R2 change
	Δ GAS	0.46		Δ TA	0.39		Δ SOL	0.28
	Δ SOL	0.10		Δ GAS	0.05		Δ MVIT	0.08
							Δ TA	0.08
Δ ML standard deviation	Adjusted R2	Multiple R2		Adjusted R2	Multiple R2		Adjusted R2	Multiple R2
	0.56	0.64**		0.11	0.22		0.40	0.47**
	Predictors	% R2 change		Predictors	% R2 change		Predictors	% R2 change
	Δ PT	0.25		Δ MVIT	0.15		Δ VA	0.34
	Δ GAS	0.27		Δ CT	0.06		Δ CT	0.14
	Δ HRT	0.11
Δ AP standard deviation	Adjusted R2	Multiple R2		Adjusted R2	Multiple R2		Adjusted R2	Multiple R2
	0.78	0.82***		0.06	0.17		0.67	0.73***
	Predictors	% R2 change		Predictors	% R2 change		Predictors	% R2 change
	Δ GAS	0.67		Δ MVIT	0.10		Δ VA	0.55
	Δ TA	0.08		Δ CT	0.07		Δ PT	0.10
	Δ MVIT	0.06					Δ TA	0.07

^***p<0.001;

^**p<0.01;

^*p<0.05.

Δ: fatigue-induced changes; MVIT: maximal voluntary isometric torque; PT: peak torque; CT: contraction time; HRT: half-relaxation time; VA: voluntary activation; GAS: gastrocnemii muscle activity; SOL: soleus muscle activity; TA: tibialis anterior muscle activity.