title: [Severe and moderate haemophilia under prophylactic replacement treatment--maximal knee extensor and flexor torque of children and adolescents].
abstract: Due to its influence on haemophilic arthropathy, the evaluation of knee extensor (K(Ext)) and flexor (K(Flex)) torques plays an important role in the preventive and rehabilitative context of haemophilia. Thus, the present study aimed at investigating maximal static torque (M(Max)) of K(Ext) and K(Flex). 14 boys with haemophilia (8 severe, 6 moderate; age: 11.7 ± 2.8 years; prophylactic treatment > 5 years) and 14 healthy carefully pair-matched controls (age: 11.5 ± 2.7 years) were separately measured for the left and right leg for M(Max). Furthermore, the ratio K(Flex)/K(Ext )was calculated and the joint situation assessed using the Haemophilia Joint Health Score.
  
  
  RESULTS
  No significant group-effect was observed for M(Max) of the K(Ext) and K(Flex) as well as for the ratio K(Flex)/K(Ext) (p>0.05). Despite significant higher joint scores in haemophilic children compared to their healthy controls (p<0.01), patients merely showed minor joint impairments.
  
  
  CONCLUSIONS
  Children and adolescents with severe and moderate haemophilia under prophylactic replacement treatment with a good joint status showed comparable maximal strength performance of relevant knee muscles compared to their healthy peers.
authors.affiliation: Lehrstuhl für Sportmedizin und Gesundheitsförderung, Friedrich-Schiller-Universität Jena, Jena. marco.herbsleb@uni-jena.de
authors.forename: M
authors.initials: M
authors.lastname: Herbsleb
authors.forename: R
authors.initials: R
authors.lastname: Abou-Hamdan
authors.forename: C
authors.initials: C
authors.lastname: Puta
authors.forename: L
authors.initials: L
authors.lastname: Donath
authors.forename: R
authors.initials: R
authors.lastname: Kobelt
authors.forename: F-D
authors.initials: FD
authors.lastname: Stanek
authors.forename: T
authors.initials: T
authors.lastname: Hilberg
authors.forename: H H W
authors.initials: HH
authors.lastname: Gabriel
mesh_terms: D000293:Adolescent; D001779:Blood Coagulation Factors / Q000627:therapeutic use*; D002648:Child; D005260:Female; D006467:Hemophilia A / Q000150:complications* / Q000517:prevention & control*; D006801:Humans; D007719:Knee Joint; D008297:Male; D053580:Muscle Strength; D018908:Muscle Weakness / Q000175:diagnosis / Q000209:etiology* / Q000517:prevention & control*; D019415:Torque; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D001779:Blood Coagulation Factors