Conclusion A prospect i ve negative association was observed between muscular fitness in childhood/adolescence and adiposity and cardiometabolic parameters in later life , together with a positive association for bone health .
There is inconclusive evidence for low back pain benefits
Background No previous systematic review has quantitatively examined the association between muscular fitness during childhood and adolescence and health parameters later in life .
Objective The aim was to systematic ally review and meta-analyze the current evidence for a prospect i ve association between muscular fitness in childhood and adolescence and future health status .
Enhanced bone mass and physical fitness in young female handball players.
This study evaluates the effect of physical activity on the bone content ( BMC ) and density ( BMD ) in 51 girls ( 14.2+/-0.4 yr ) . Twenty-four were placed in the h and ball group as they have been playing h and ball for at least 1 year ( 3.9+/-0.4 ) . The other 27 who did not perform in any kind of regular physical activity other than that programmed during the compulsory physical education courses comprised the control group .  Bone mass and areal density were measured by dual-energy X-ray absorptiometry ( DXA ) . The maximal leg extension isometric force in the squat position with knees bent at 90 degrees and the peak force , mean power , and height jumped during vertical squat jump were assessed with a force plate . Additionally , 30-m run ( running speed ) and 300-m run ( as an estimate of anaerobic capacity ) tests were also performed . Maximal aerobic capacity was estimated using the 20-m shuttle-run tests . Compared to the controls , h and ballers attained better results in the physical fitness tests and had a 6 % and 11 % higher total body and right upper extremity lean mass ( all P<0.05 ) . The h and ballers showed enhanced BMC and BMD in the lumbar spine , pelvic region , and lower extremity ( all P<0.05 ) . They also showed greater BMC in the whole body and enhanced BMD in the right upper extremity and femoral neck than the control subjects ( all P<0.05 ) . As expected , total lean mass strongly correlated with total and regional BMC and BMD ( r=0.79 - 0.91 P<0.001 ) . Interestingly , 300-m running speed correlated with BMC and BMD variables ( r=0.59 - 0.67 and r=0.60 - 0.70 , respectively ; all P<0.001 ) . Multiple regression analysis showed that the 30-m running speed test , combined with the height and body mass , has also predictive value for whole-body BMC and BMD ( R=0.93 and R=0.90 , P<0.001 ) . In conclusion , h and ball participation is associated with improved physical fitness , increased lean and bone masses , and enhanced axial and appendicular BMD in young girls . The combination of anthropometric and fitness-related variables may be used to detect girls with potentially reduced bone mass
Conclusion A prospect i ve negative association was observed between muscular fitness in childhood/adolescence and adiposity and cardiometabolic parameters in later life , together with a positive association for bone health .
There is inconclusive evidence for low back pain benefits
Background No previous systematic review has quantitatively examined the association between muscular fitness during childhood and adolescence and health parameters later in life .
Objective The aim was to systematic ally review and meta-analyze the current evidence for a prospect i ve association between muscular fitness in childhood and adolescence and future health status .