Table 2.
Descriptive statistics and psychometric properties of the major study variables.
| Range |
|||||||
|---|---|---|---|---|---|---|---|
| M | SD | α (items) | Potential | Actual | Skewness | Kurtosis | |
| Perceived stress | 3.71 | 2.61 | 0.75 (4) | 0–16 | 0–13 | 0.98 | 1.04 |
| Physical activity (min/week) | |||||||
| Overall LTPA (MPA + VPA) | 230.19 | 183.73 | — (4) | 0+ | 0–840 | 1.06 | 0.88 |
| MPA | 98.57 | 87.65 | — (2) | 0+ | 0–600 | 1.63 | 3.53 |
| VPA | 132.41 | 148.83 | — (2) | 0+ | 0–840 | 1.79 | 3.73 |
| Psychological need satisfaction | |||||||
| Overall PNS index | 5.46 | 0.61 | 0.86 (20) | 1–7 | 2.82–6.94 | –0.58 | 1.06 |
| Autonomy | 5.29 | 0.78 | 0.75 (7) | 1–7 | 2.71–7.00 | –0.63 | 0.39 |
| Competence | 5.50 | 0.75 | 0.72 (6) | 1–7 | 2.67–7.00 | –0.69 | 0.51 |
| Relatedness | 5.59 | 0.66 | 0.71 (7) | 1–7 | 2.75–7.00 | –0.43 | 0.81 |
| Burnout symptoms | |||||||
| Overall SMBM index | 2.42 | 1.01 | 0.95 (14) | 1–7 | 1.00–6.21 | 0.99 | 0.72 |
| Physical exhaustion | 2.72 | 1.26 | 0.92 (6) | 1–7 | 1.00–7.00 | 0.88 | 0.35 |
| Cognitive weariness | 2.43 | 1.16 | 0.95 (5) | 1–7 | 1.00–6.00 | 0.86 | 0.27 |
| Emotional exhaustion | 1.80 | 0.86 | 0.90 (3) | 1–7 | 1.00–5.33 | 1.34 | 2.13 |
LTPA, leisure-time physical activity; MPA, moderate physical activity; VPA, vigorous physical activity; PNS, psychological need satisfaction; SMBM, Shirom-Melamed Burnout Measure.