Motor fitness , particularly balance , was the most studied fitness component , while cardiorespiratory fitness was the least studied .
While we wait for more evidence to be accumulated in preschool children , the PREFIT battery hereby proposed is a useful tool for assessing physical fitness in children aged 3–5 years
Background Physical fitness is a powerful health marker in childhood and adolescence , and it is reasonable to think that it might be just as important in younger children , i.e. preschoolers .
At the moment , research ers , clinicians and sport practitioners do not have enough information about which fitness tests are more reliable , valid and informative from the health point of view to be implemented in preschool children .
Objective Our aim was to systematic ally review the studies conducted in preschool children using field-based fitness tests , and examine their ( 1 ) reliability , ( 2 ) validity , and ( 3 ) relationship with health outcomes .
Our ultimate goal was to propose a field-based physical fitness-test battery to be used in preschool children .
After analyzing the information retrieved in the current systematic review about fitness testing in preschool children , we propose the PREFIT battery , field-based FITness testing in PREschool children .
Muscular strength in male adolescents and premature death: cohort study of one million participants
Objectives To explore the extent to which muscular strength in adolescence is associated with all cause and cause specific premature mortality ( < 55 years ) . Design Prospect i ve cohort study . Setting Sweden . Participants 1 142 599 Swedish male adolescents aged 16 - 19 years were followed over a period of 24 years . Main outcome measures Baseline examinations included  knee extension , h and grip , and elbow flexion strength tests  , as well as measures of  diastolic and systolic blood pressure and body mass index . Cox regression was used to estimate hazard ratios for mortality according to muscular strength categories ( tenths ) . Results During a median follow-up period of 24 years , 26 145 participants died . Suicide was a more frequent cause of death in young adulthood ( 22.3 % ) than was cardiovascular diseases ( 7.8 % ) or cancer ( 14.9 % ) . High muscular strength in adolescence , as assessed by knee extension and h and grip tests , was associated with a 20 - 35 % lower risk of premature mortality due to any cause or cardiovascular disease , independently of body mass index or blood pressure ; no association was observed with mortality due to cancer . Stronger adolescents had a 20 - 30 % lower risk of death from suicide and were 15 - 65 % less likely to have any psychiatric diagnosis ( such as schizophrenia and mood disorders ) . Adolescents in the lowest tenth of muscular strength showed by far the highest risk of mortality for different causes . All cause mortality rates ( per 100 000 person years ) ranged between 122.3 and 86.9 for the weakest and strongest adolescents ; corresponding figures were 9.5 and 5.6 for mortality due to cardiovascular diseases and 24.6 and 16.9 for mortality due to suicide . Conclusions Low muscular strength in adolescents is an emerging risk factor for major causes of death in young adulthood , such as suicide and cardiovascular diseases . The effect size observed for all cause mortality was equivalent to that for well established risk factors such as elevated body mass index or blood pressure
Motor fitness , particularly balance , was the most studied fitness component , while cardiorespiratory fitness was the least studied .
While we wait for more evidence to be accumulated in preschool children , the PREFIT battery hereby proposed is a useful tool for assessing physical fitness in children aged 3–5 years
Background Physical fitness is a powerful health marker in childhood and adolescence , and it is reasonable to think that it might be just as important in younger children , i.e. preschoolers .
At the moment , research ers , clinicians and sport practitioners do not have enough information about which fitness tests are more reliable , valid and informative from the health point of view to be implemented in preschool children .
Objective Our aim was to systematic ally review the studies conducted in preschool children using field-based fitness tests , and examine their ( 1 ) reliability , ( 2 ) validity , and ( 3 ) relationship with health outcomes .
Our ultimate goal was to propose a field-based physical fitness-test battery to be used in preschool children .
After analyzing the information retrieved in the current systematic review about fitness testing in preschool children , we propose the PREFIT battery , field-based FITness testing in PREschool children .