Strength Training Improves Fatigue Resistance and Self-Rated Health in Workers with Chronic Pain: A Randomized Controlled Trial

Table 3

Correlation between variables.

	Correlation coefficient (Spearman’s )
	Fear avoidance	Pain
Time to fatigue
Peak extensor EMG
Handgrip strength	0.17	0.13

Coefficient (Spearman’s ) between pre- and postintervention changes in fear avoidance, pain intensity, time to fatigue, peak extensor EMG (during the fatigue test), and handgrip strength. .