Is the International Fitness Scale (IFIS) a reliable and useful tool for assessing physical fitness and cardiovascular profile in adolescents?
The International Fitness Scale (IFIS) is a reliable self-reported tool that accurately reflects measured physical fitness and cardiovascular health profiles in adolescents.
(i) The IFIS is able to correctly rank adolescents according to their measured physical fitness levels; (ii) adolescents reporting a good/very good overall fitness, CRF or SP-AG have a more favorable cardiovascular profile; and (iii) The IFIS is reliable in adolescents.
Ortega et al. (2011) studied this question.