Table 3 Pearson (r) and Spearman (ρ) Correlations between Fitbit and GT3X+ SED and MVPA estimates

From: Concurrent validity of the Fitbit for assessing sedentary behavior and moderate-to-vigorous physical activity

		Fitbit Flex
		SED (r/ρ)	MVPA (r/ρ)
GT3X+	SED^a (Freedson/Troiano)	0.90^‡ / 0.86^‡	−0.28^† / -0.32^‡
	MVPA^b (Freedson)	−0.24 / -0.25^†	0.66^‡ / 0.71^‡
	MVPA (Troiano)	−0.22 / -0.24	0.65^‡ / 0.69^‡
	MVPA (VM3)	−0.31^† / -0.35^†	0.76^‡ / 0.79^‡

^aSED: sedentary behavior
^bMVPA: moderate-to-vigorous physical activity
^†P < .05; ^‡P < .01;

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