Assessment of physical activity intensity and duration in the paediatric population: evidence to support an a priori hypothesis and sample size in the agreement between subjective and objective methods

1. Nascimento-Ferreira, M.V.
2. De Moraes, A.C.F.
3. Toazza Oliveira, P.V.
4. Rendo-Urteaga, T.
5. Gracia-Marco, L.
6. Forjaz, C.L.M.
7. Moreno, L.A.
8. Carvalho, H.B.