Table 1 Sample characteristics (N = 201).

Demographics	M (SD)^a
Age (years)	24.2 (5.3)
Sex (n, (%) females)	104 (52)
Education (n, (%))
High school^b	102 (51)
Bachelor’s degree or higher^c	99 (49)
Intelligence quotient
Shipley vocabulary	112.2 (8.8)
Figure series (n correct; max. 30)	2.4 (1.2)
BMI (kg m⁻²)	24.2 (3.9)
Overweight or obese (n, (%))	69 (34)
FFVO₂peak (mL kg⁻¹ min⁻¹)	57.1 (7.3)
VO₂peak percentile
Low fit (< 35%-tile^d; n(%))	70 (35)
Accelerometry
Valid days of accelerometer wear [Med (IQR)]	6.0 (2.0)
Accelerometer wear time (min/day)	865.9 (119.4)
Sedentary time (min/day)	603.6 (119.2)
MVPA (min/day)	41.3 (24.8)
Meeting physical activity guidelines (n, %)	159 (79)
Local efficiency (range 0–1)
FPN	0.35 (0.03)
DAN	0.35 (0.03)
VAN	0.38 (0.04)
DMN	0.32 (0.02)
Global efficiency (range 0–1)
FPN	0.28 (0.04)
DAN	0.30 (0.04)
VAN	0.32 (0.04)
DMN	0.26 (0.03)
A-DMC
A-DMC index (z score)	0.08 (0.52)
Over/underconfidence (range 0–1)	0.92 (0.06)
Applying decision rules (range 0–1)	0.84 (0.15)
Consistency in risk perception (range 0–1)	0.75 (0.11)
Recognizing social norms (range −1 to 1)	0.48 (0.21)
Resistance to framing (range 0–5)	4.20 (0.43)
Resistance to sunk cost (range 0–6)	4.36 (0.69)

BMI body mass index; overweight was defined based on BMI ≥ 25 and < 30, obesity was defined as BMI ≥ 30¹³³; FFVO₂peak peak oxygen uptake adjusted for fat free mass, MVPA moderate-to-vigorous physical activity, DAN dorsal attention network, VAN ventral attention network, FPN frontoparietal network, DMN default mode network, A-DMC Adult-Decision Making Competence Battery.
^aNumber and percent are included for categorical variables; median values are presented for the number of valid days; ^bincludes 1 participant with vocational school; ^cincludes 11 participants with an associate’s degree; ^d¹¹.

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